Murmidiella sola, Jałoszyński & Ślipiński, 2022

Jałoszyński, Paweł & Ślipiński, Adam, 2022, Revision of the family Murmidiidae (Coleoptera: Coccinelloidea), Zootaxa 5109 (1), pp. 1-102 : 82-88

Murmidiella sola sp. n.

( Figs 235–258 )

Type material examined. Holotype ( Ecuador): ♀, “ Ecuador: Napo, Res. Ethnica / Waorani, 1 km S. Onkone Gare / Camp , Trans. Ent. 20 June 1996 / 220m. 00º39’10’’S, 076º26’W / T. L. Erwin, et al. collectors”, “Insecticidal fog- ging of mostly bare / green leaves, some with covering / of lichenous or bryophytic plants in / terre firme forest. At Trans. 1, / Sta. 3 Project MAXUS Lot 1523” ( USNM) . Paratypes: 3 ♀♀ (2 disarticulated), same data as for holotype ( USNM) .

Diagnosis. As for genus; vide supra.

Description. BL 1.30–1.38 mm; BL/EW 1.26–1.27. Body nearly circular ( Figs 254–255 ) and in lateral view strongly convex ( Fig. 256 ); pigmentation dark brown, legs slightly lighter; dorsum with extremely short, barely discernible setae; microreticulation on clypeus distinct and matt, on frons and vertex much finer and superficial, semi-matt, pronotum and elytra smooth and glossy.

Head 0.38–0.39 mm wide; frons and vertex weakly convex, with small but sharply marked punctures ( Fig. 257 ) separated by spaces subequal to their diameters; clypeus matt; eyes large, strongly convex, coarsely faceted. Antennal club about twice as long as broad.

Pronotum ( Fig. 254 ) strongly transverse, widest at base; PL 0.28 mm, PW 0.78–0.89 mm, PL/PW 0.31–0.35; lateral margins weakly rounded and very strongly convergent anterad, with very fine lateral carinae; anterior pronotal margin with very fine, barely discernible marginal line. Punctures on disc ( Fig. 257 ) as small and distinct as those on frons and vertex but much sparser and slightly unevenly distributed, those on median area separated by spaces 1.5‒2 × their diameters.

Prosternum ( Fig. 255 ) with distinct, mostly transverse microreticulation and with fine, inconspicuous setiferous punctures; near anterior 2/3 with a pair of small glandular openings; prosternal carinae about as long as half-length of prosternum and each accompanied by a longitudinal row of densely distributed, large circular and shallow alveolate punctures; notosternal carinae curved outwards, not reaching anterior prosternal margin, the latter with narrow but distinct marginal carina.

Elytra ( Figs 254, 256 ) together oval, with strongly rounded sides, broadest near anterior 1/3, EL 0.90–0.98 mm, EW 1.03–1.09 mm, EL/EW 0.88–0.90. Humerus with distinct callus; elytra with shallow but well-discernible punc- tures arranged into partly irregular, not very distinct longitudinal rows, more distinct on sides, punctures reducing in diameters and depth toward elytral apices. Epipleura ( Fig. 255 ) broad and unmodified, at the level of middle of metaventrite slightly narrower than width of mesofemur.

Hind wings fully developed.

Mesoventral plate ( Fig. 258 ) lacking lateral longitudinal carinae and anterior submarginal carina; anterior margin evenly rounded; surface with sparse and shallow circular or oval alveolate punctures distributed along anterior margin and on sides.

Metaventrite ( Figs 255, 258 ) with similar alveolate punctures as those on mesoventral plate distributed on sides, median region smooth with a pair of slightly elevated strips of cuticle covered with fine longitudinal microsculpture and forming an inversed V-shaped structure ( Fig. 258 ). Discrimen externally not visible.

Tarsi with moderately long setae on tarsomeres 1–3 ( Fig. 255 ).

Distribution. Neotropical ( Ecuador).

Etymology. The specific epithet sola refers to fact that this is the only one known species in Murmidiella .

Genus Mychocerinus Ślipiński

Mychocerus LeConte, 1869: 255. Type species: Murmidius depressus LeConte, 1866 (by monotypy); preoccupied, not Mycho- cerus Erichson, 1845: 293.

Mychocerinus Slipinski, 1990: 85 ; new name for Mychocerus LeConte, 1866.

Emended diagnosis. Body elongate oval; distinctly flattened; dorsum with dense setae; labrum exposed; clypeus subrectangular, not broadening anterad or indistinctly broadening; antennal sulci along mesoventral margins of eyes present; ocular carinae along dorsomesal margins of eyes lacking; mentum subhexagonal with distinctly angulate sides; ligula distinctly cordiform but not bilobed; antenna composed of nine antennomeres, with unmodified, subconical scape and not elongate penultimate antennomere; antennomeres 4–6 slightly asymmetrical, with mesal margins expanded; prothoracic antennal cavities not visible in dorsal view; prosternal plate with anterior margin in lateral view not projecting beyond level of anterior margin of pronotum; submedian prosternal carinae present; notosternal carinae curved outwards or sinuate; prosternal process about three times as broad as procoxa, subtrapezoidal or subrectangular, strongly transverse; mesoventral plate with anterior margin straight or indistinctly convex and lacking submarginal carina; metaventrite with discrimen externally not discernible but complete, extending from posterior margin of mesoventrite nearly to posterior margin of metaventrite; elytra with lateral margins strongly flattened above epipleural carinae; elytral epipleural carinae entirely exposed in dorsal view; elytral punctures at least partly arranged in longitudinal rows; tegmen with well developed, articulated and elongate parameres, ~ times as long as broad at base, in all species with not only apical, but also subapical and often also basal setae along external margins.

Redescription. Body of adults 0.93–1.3 mm long, stout, flattened and strongly rounded laterally, light to dark brown, cuticle not very glossy and covered with short but dense setae well-visible under stereomicroscope.

Head ( Figs 259–262 ) prognathous, not declining or indistinctly declining in natural position. Occiput ( Fig. 259 ; occ) strongly transverse and demarcated from frons by step-wise vertexal ridge ( Figs 259, 262 ; vr) which extends laterad on each side where it becomes weaker and disappears near 1/3 of head height ( Fig. 262 ). Vertex ( Fig. 259 ; vt) strongly transverse and moderately convex, with posterior margin anteriorly indistinctly concave, vertex anteriorly confluent with strongly transverse, convex frons ( Fig. 259 ; fr); clypeus ( Figs 259, 261–262 ; cl) nearly as long as but much narrower than frons, subrectangular and transverse, demarcated by distinct impressed frontoclypeal line marking site of internal ridge, sides of clypeus not constricted or only indistinctly divergent anterad, anterior margin weakly convex or straight, entire clypeus weakly declining. Gular region demarcated from submentum and genae by fine gular ridge ( Figs 260, 262 ; gr) laterally extending to nearly middle of head height and posteriorly demarcating broad antennal sulcus ( Figs 260, 262 ; ans).

Antennal fossae ( Figs 261–262 ; anf) small, situated near mesal margin of each eye, not visible in dorsal view, exposed in lateral view. Antenna ( Fig. 263 ) composed of 9 antennomeres, only slightly longer than head; inserted in such a way that in resting position pedicel is directed ventrad and distal portion of recurved antenna rests in antennal sulcus, with club inserted into prothoracic antennal cavity. Scape ( Fig. 263 ; sc) strongly enlarged, with small subbasal and sublateral ‘stalk’ inserted into antennal foramen, subconical and indistinctly asymmetrical; pedicel ( Fig. 263 ; pd) shorter and much narrower than scape, subcylindrical with slightly asymmetrical base; antennomeres 3–8 ( Fig. 263 ; an 3–8) each much narrower than pedicel, of unequal width, and slightly asymmetrical, especially antennomere 6 slightly enlarged and with mesal margin expanding; antennomere 8 ( Fig. 263 ; an8) subquadrate, never elongate; antennal club ( Fig. 263 ; clb) oval, elongate and as broad as or indistinctly broader than scape, with slightly more than basal half showing transverse annulate microsculpture and distal portion lacking microsculpture but with uneven, slightly granulate surface and bearing several strongly elongate basiconic sensilla in addition to setae.

Labrum ( Figs 259, 261–262 ; lbr) exposed, strongly transverse and much shorter than clypeus, with dense and irregularly distributed dorsal setae. Mandibles ( Figs 264–265 ) symmetrical, subtriangular, each with short basal region bearing massive, darkly sclerotized oval, plate-shaped mola ( Figs 264–265 ; mo) with microtuberculate surface, in resting positions molar grinding surfaces touch at middle ( Fig. 261 ); prostheca ( Figs 264–265 ; pst) present, membranous and in anterior half setose; distal mandibular region with three blunt teeth; external mandibular margin with several short erect setae. Maxilla ( Fig. 260 ) with semioval cardo ( Fig. 260 ; cd); basistipes ( Fig. 260 ; bst) short, triangular; mediostipes ( Fig. 260 ; mst) subrectangular; lacinia and galea (not shown) each elongate, flat and with dense mesal and apical fringe of setae; maxillary palp tetramerous, with conspicuously small palpomere 1 ( Fig. 260 ; mxp1) which is minute and inserted on poorly differentiated palpifer, palpomere 2 ( Figs 260 , 214 ; mxp2) large, asymmetrical, with external margin convex, angulate and long and mesal margin concave or straight and short, weakly elongate and sparsely setose, palpomere 3 ( Figs 260, 262 ; mxp3) much smaller than palpomere 2, subcylindrical and transverse, with several setae, palpomere 4 ( Figs 260, 262 ; mxp4) only slightly shorter than mxp2 and much longer than mxp3, slightly narrowing distad and truncate at apex, with one seta. Submentum ( Fig. 260 ; smn) short, transverse with straight anterior margin. Mentum ( Fig. 260 ; mn) at base as broad as submentum, strongly broadening anterad and near middle rapidly, strongly narrowing toward short and concave anterior margin, general shape hexagonal with lateral margins in posterior half convex, and in anterior half concave, ventral surface sparsely covered with short setae. Ligula ( Fig. 260 ; lig) large and cordiform but not bilobed, with dense setae on anterior half. Labial palps inserted laterally at base of ligula, trimerous; labial palpomere 1 ( Fig. 260 ; lp1) minute, indistinctly elongate, subcylindrical; palpomere 2 ( Fig. 260 ; lp2) nearly as large as maxillary palpomere 2 and similarly shaped; palpomere 3 ( Fig. 260 ; lp3) as terminal maxillary palpomere but distinctly smaller.

Tentorium lacking corporatentoria, with W-shaped tentorial bridge ( Fig. 260 ; tb) bearing anterior median projection; posterior tentorial arms ( Fig. 260 ; pta) fused with ventral wall of head, and posterior tentorial pits ( Fig. 260 ; ptp) visible at least in some specimens; anterior tentorial arms ( Fig. 260 ; ata) long and slender, each with small angulate lateral expansion near middle.

Prothorax ( Figs 266‒267 ) strongly transverse; pronotum anteriorly shallowly emarginate with relatively strong- ly projecting, subtriangular and obtuse-angled anterior corners; sides rounded with complete lateral carinae ( Fig. 267 ; lc); posterior corners distinct, slightly obtuse-angled or nearly right; pronotal base strongly projecting towards scutellar shield. Antennal cavities ( Figs 266–267 ; anc) large but not visible in dorsal view. Prosternum ( Fig. 266 ; pst) much longer than half length of prothorax, laterally fused with hypomera anteriorly, and posteriorly demarcated by sinuate notosternal carinae ( Figs 266–267 ; nsc) externally marking sites of reduced notosternal sutures; submedian prosternal carinae ( Fig. 266 ; psc) present in all species; prosternal process ( Fig. 266 ; psp) subtrapezoidal or subrectangular, strongly transverse, with weakly concave posterior margin, as broad as three widths of procoxa. Hypomeron ( Fig. 266 ; hy) broad and weakly impressed, with well-defined postcoxal process. Profurcal arms (not shown) long, profurcal foveae not visible externally.

Fore legs ( Fig. 266 ) with subglobose coxae; elongate and subtriangular trochanters; broad, short and dorsoventrally flattened femora; tibiae only slightly longer than femora, gradually broadening distad; tarsi subcylindrical, distinctly longer than half length of tibia, with tarsomere 4 longer than 1–3 combined; tarsal claws long

Mesonotum ( Fig. 268 ) with strongly transverse mesoscutum ( Fig. 268 ; sc2) and mesoscutellum ( Fig. 268 ; scl2) demarcated by weakly marked scutoscutellar suture; mesoscutellum with strongly sclerotized scutellar shield ( Fig. 268 ; scs), its posteromedian triangular portion exposed between elytral bases.

Elytra ( Fig. 270 ) together suboval with truncate bases; epipleura visible in lateral view and demarcated from elytral disc by complete, sharp epipleural carina which is entirely or almost entirely visible in dorsal view, narrow supra-epipleural region of each elytron strongly flattened; elytral apex with ventral field of cuticular projections arranged in rows, interlocking with crenulation of abdominal ventrite 5. Elytral punctures at least partly arranged in distinct rows.

Mesoventrite ( Fig. 269 ; v 2 ) with transverse, hexagonal posteromedian mesoventral plate ( Fig. 269 ; mvp) with its posterior margin in most dry-mounted specimens poorly marked, plate lacking anterior submarginal carina; mesoventrite in front of plate situated more dorsally, interlocking with prothorax in such a way that in natural position prosternal process and procoxae overlap anterior portion of mesoventrite and medially tightly fit to anterior margin of mesoventral plate. Mesanepisterna and mesepimera large, in natural position subvertical (in Fig. 269 artificially ‘unfolded’ laterad).

Middle legs ( Fig. 269 ) with subglobose coxae; elongate, subtriangular trochanters; broad and short, flattened dorso-ventrally femora; tibiae relatively slender, slightly longer than femora, gradually and weakly thickening distad; tarsi subcylindrical, distinctly longer than half length of tibia, tarsomere 4 longer than 1–3 combined, tarsal claws long.

Metanotum ( Fig. 268 ) with large metascutum ( Fig. 268 ; sc3) divided at middle by median membranous area ( Fig. 268 ; mma); alacristae ( Fig. 268 ; alc) complete; postnotum ( Fig. 268 ; pn3) transverse, with rounded posterior margin.

Hind wings (not shown) well-developed and functional in all nominal species.

Metaventrite ( Fig. 269 ; v 3 ) strongly transverse, with entire discrimen ( Fig. 269 ; dsc) which is not marked externally in most studied specimens; sides with metaventral femoral lines ( Fig. 269 ; mfl) mesally and posteriorly demarcating impressed mesofemoral rests; posteromedian margin of metaventrite straight or nearly so. Metanepisterna ( Fig. 269 ; aest3) and metepimera (not shown) narrow, in natural position subvertical.

Metendosternite with elongate, divergent metafurcal arms ( Fig. 269 ; mtfa), each with additional submedian lateral projection, each arm ending with small plate for muscle attachment close to middle of metaventrite.

Hind legs ( Fig. 269 ) with transverse, weakly convex and drop-shaped coxae; elongate, subtriangular trochan- ters; broad and short, flattened dorso-ventrally femora; tibiae relatively slender, slightly longer than femora, gradually and weakly thickening distad; tarsi subcylindrical, distinctly longer than half length of tibia, tarsomere 4 about as long as 1–3 combined, tarsal claws long.

Abdomen ( Fig. 271 ) with five visible ventrites, of which first is as long (or nearly so) as 2–4 combined and bears abdominal femoral lines ( Fig. 271 ; afl) bordering slightly impressed metafemoral rests; ventrite 5 with posterior margin crenulate, bearing transverse row of peg-like cuticular projections interlocking with ventral apical trichial fields of each elytron.

Aedeagus (e.g., Figs 284–285 ) with tubular penis, sheath-like tegmen with elongate median strut and a pair of elongate articulated parameres (articulation in one species poorly marked) with apical and subapical setae, in some species also basal setae.

Immature stages. Unknown.

Composition and distribution. Six nominal species are distributed in New Caledonia, Hawaiian Islands, USA (Arizona, Eastern North America from southern Ontario south to Florida and west to eastern Texas), Mexico, Guatemala, Argentina (see also remarks).

Remarks. Very rare genus in surveyed collections. Adults have been collected under bark of various trees, often infested by fungi. There are two further species (found in Paraguay and Samoa) which are left undescribed due to the lack of sufficient material and distinctive external features.

Key to the species of Mychocerinus

1 - 2

-

3

- 4 - 5

- Dorsum with suberect pubescence ( Figs 282 , 308 )........................................................... 2 Dorsum with recumbent pubescence ( Figs 275 , 289 , 294 , 301 )................................................. 3 Body nearly circular ( Fig. 305 ) and in lateral view with the highest site situated near middle of elytra ( Fig. 308 ); elytra darker than pronotum ( Fig. 305 ); flattened sides of pronotum lacking large punctures ( Fig. 306 ); rows of punctures on elytra indistinct, even on outer half composed of small and sparse punctures separated by spaces over 3‒4 times wider than their diameters ( Fig. 306 ); sides of metaventrite with about a dozen sparse punctures ( Fig. 309 )......... M. oahuanus sp. n. [Hawaiian Islands] Body shortly elongate ( Fig. 279 ) and in lateral view with the highest site situated clearly behind middle of elytra ( Fig. 282 ); elytra not darker than pronotum ( Fig. 279 ); flattened sides of pronotum covered with large punctures ( Fig. 280 ); rows of punctures on elytra distinct at least in outer half, where large punctures are separated by spaces equal to or narrower than their diameters ( Fig. 280 ); sides of metaventrite with about three dozens densely distributed punctures ( Fig. 283 ).......................

.................................................................... M. caledonicus sp. n. [ New Caledonia] Lateral pronotal margins parallel in posterior half or slightly more ( Fig. 271 ).......................................

.......................................... M. arizonensis Lawrence & Stephan [ USA: Arizona; Mexico: Sonora] Lateral pronotal margins narrowing anterad from base ( Figs 292 , 297 , 285 )....................................... 4 Body dark brown............................................................... M. piceus sp. n. [ Argentina] Body light brown...................................................................................... 5 Parameres in lateral view slender, about 3 times as long as broad, with setae on distal half ( Fig. 303 ).....................

................................................................... M. pilifer (Lewis) [ Guatemala, Mexico] Parameres in lateral view stout, about 1.5 times as long as broad, with setae distributed from near base ( Fig. 291 ). ..........

.................................................................... M. depressus (LeConte) [eastern USA]

Figures

FIGURES 235–241. Morphological structures of Murmidiella sola gen. & sp. n. Head in dorsal (235), ventral (236), anterior (237) and lateral (238) views; antenna in dorsal (239) and lateral (240) views, and antennal club (241). Abbreviations: an3–7, antennomere 3–7; anf, antennal fossa; ata, anterior tentorial arm; bst, basistipes; cd, cardo; cl, clypeus; clb, antennal club; dta, dorsal tentorial arm; fr, frons; gal, galea; gr, gular ridge; lac, lacinia; lbr, labrum; lig, ligula; lp1–3, labial palpomere 1–3; md, mandible; mn, mentum; mst, mediostipes; mxp1–4, maxillary palpomere 1–4; oc, ocular carina; occ, occiput; pd, pedicellus; pta, posterior tentorial arm; sc, scapus; smn, submentum; tb, tentorial bridge; vr, vertexal ridge; vt, vertex.

FIGURES 242–246. Morphological structures of Murmidiella sola gen. & sp. n. Labrum in dorsal view (242); labial-maxillary complex in ventral view (243); mandible in dorsal (244) and mesal (245) views; maxilla in ventral view (246). Abbreviations: bst, basistipes; eps, epipharyngeal scaffold; gal, galea; lac, lacinia; lp1–3, labial palpomere 1–3; mn, mentum; mo, mola; mst, mediostipes; mxp1–4, maxillary palpomere 1–4; ppf, palpifer; pst, prostheca; smn, submentum; tr, torma.

FIGURES 247–253. Morphological structures of Murmidiella sola gen. & sp. n. Prothorax in ventral (247) and lateral (248) views; mesonotum in dorsal view (249); metanotum in dorsal view (250); pterothorax in ventral view (251); right elytron in dorsal view (252); abdomen in ventral view (253). Abbreviations: aest2–3, meso- and metanepisternum; afl, abdominal femoral line; alc, alacrista; anc, antennal cavity; av1–5, abdominal ventrite 1–5; dsc, discrimen; epm2, mesepimeron; hy, hypomeron; lc, lateral carina; mfl, metaventral femoral line; mma, median membranous area; mtfa, metafurcal arm; mvp, mesoventral plate; nsc, notosternal carina; pf, profurcal arm; pn3, metapostnotum; psc, prosternal carina; psp, prosternal process; pst, prosternum; sc2– 3, meso- and metascutum; scl2, mesoscutellum; scs, scutellar shield; smc, submarginal carina; v2–3, meso- and metaventrite.

FIGURES 254–258. Morphological structures of Murmidiella sola gen. & sp. n. Body in dorsal (254), ventral (255) and lateral (256) views; head in anterior view (257); and pterothorax in ventral view (258).

FIGURES 259–265. Morphological structures of Mychocerinus depressus (LeConte). Head in dorsal (259), ventral (260), ante- rior (261) and lateral (262) views; antenna (263); mandible in drsal (264) and mesal (265) views. Abbreviations: an3–8, antennomere 3–8; anf, antennal fossa; ans, antennal sulcus; ata, anterior tentorial arm; bst, basistipes; cd, cardo; cl, clypeus; clb, antennal club; fr, frons; gal, galea; gr, gular ridge; lac, lacinia; lbr, labrum; lig, ligula; lp1–3, labial palpomere 1–3; md, mandible; mn, mentum; mst, mediostipes; mxp1–4, maxillary palpomere 1–4; oc, ocular carina; occ, occiput; pd, pedicellus; pta, posterior tentorial arm; ptp, posterior tentorial pit; sc, scapus; smn, submentum; tb, tentorial bridge; vr, vertexal ridge; vt, vertex.

FIGURES 213–219. Morphological structures of Murmidius elongatus sp. n. Body in dorsal (213–214), ventral (215) and lateral (216) views; pterothorax in ventral view (217); aedeagus (218), and isolated penis (219).

FIGURES 266–271. Morphological structures of Mychocerinus depressus (LeConte). Prothorax in ventral (266) and lateral (267) views; meso- and metanotum in dorsal view (268); pterothorax in ventral view (269); right elytron in dorsal view (270); abdomen in ventral view (271).Abbreviations: aest2–3, meso- and metanepisternum; afl, abdominal femoral line; alc, alacrista; anc, antennal cavity; av1–5, abdominal ventrite 1–5; dsc, discrimen; epm2, mesepimeron; hy, hypomeron; lc, lateral carina; mfl, metaventral femoral line; mma, median membranous area; mtfa, metafurcal arm; mvp, mesoventral plate; nsc, notosternal carina; pf, profurcal arm; pn3, metapostnotum; psc, prosternal carina; psp, prosternal process; pst, prosternum; sc2–3, meso- and metascutum; scl2, mesoscutellum; scs, scutellar shield; smc, submarginal carina; v2–3, meso- and metaventrite.

FIGURES 1–7. Morphological structures of Botrodus montserratensis sp. n. Head in dorsal (1), ventral (2), anterior (3) and lateral (4) views; antenna in dorsal view (5); mandibles in dorsal (6) and mesal (7) views. Abbreviations: an3–7, antennomere 3–7; anf, antennal fossa; ans, antennal sulcus; ata, anterior tentorial arm; bst, basistipes; cd, cardo; cl, clypeus; clb, antennal club; dta, dorsal tentorial arm; fr, frons; gal, galea; gr, gular ridge; lac, lacinia; lbr, labrum; lig, ligula; lp1–3, labial palpomere 1–3; md, mandible; mn, mentum; mo, mola; mst, mediostipes; mxp1–4, maxillary palpomere 1–4; occ, occiput; pd, pedicellus; pst, prostheca; pta, posterior tentorial arm; sc, scapus; smn, submentum; tb, tentorial bridge; vr, vertexal ridge; vt, vertex.

FIGURES 279–285. Morphological structures of Mychocerinus caledonicus sp. n. Body in dorsal (279–280), ventral (281) and lateral (282) views; pterothorax in ventral view (283); and aedeagus (284–285).

FIGURES 305–311. Morphological structures of Mychocerinus oahuanus sp. n. Body in dorsal (305–306), ventral (307) and lateral (308) views; pterothorax in ventral view (309); and aedeagus (310–311).

FIGURES 272–278. Morphological structures of Mychocerinus arizonensis Lawrence & Stephan. Body in dorsal (272), ven- tral (273) and lateral (275) views; head in anterior view (274); pterothorax in ventral view (276); and aedeagus (268–278; after Lawrence & Stephan (1975). 271–275: ©President and Fellows of Harvard College.

FIGURES 286–292. Morphological structures of Mychocerinus depressus (LeConte). Body in dorsal (286–287), ventral (288) and lateral (289) views; pterothorax in ventral view (290); and aedeagus (291–292).

FIGURES 293–297. Morphological structures of Mychocerinus piceus sp. n. Body in dorsal (293, 295), lateral (294) and ventral (296) views; and pterothorax in ventral view (297).

FIGURES 298–304. Morphological structures of Mychocerinus pilifer (Lewis). Body in dorsal (298–299), ventral (300) and lateral (301) views; pterothorax in ventral view (302); and aedeagus (303–304).