Empis (Planempis)

Saigusa, Toyohei, 2012, Revision of the type series of Empis (Planempis) mandarina Frey, the type species of Planempis (Diptera: Empididae), Zootaxa 3353, pp. 55-68 : 67-68

Empis (Planempis) sp.

( Fig. 3 F)

Empis (Planempis) mandarina: Frey, 1953: 40 (partim.). Empis mandarina: Frey, 1954: 417 (partim).

Empis (Planempis) mandarina: Frey, 1955: 11 (partim.).

Diagnosis. Entirely blackish brown to black, medium-sized species of E. ( Planempis ), female with dark brown wings, no acrostichals, uniserial dorsocentrals, 6 scutellars, f2 and f3 clothed with short dense subpennate pv bristles on apical 1/3.

Description. Female. The following description is based on three female syntypes of E. mandarina sensu Frey taken from Kuatun.

Head black, dark grey pollinose, compound eyes widely separated on frons with all facets subequal; frons slightly wider than ocellar tubercle, densely black pollinose, without setae; face broader than frons, gently widened towards narrowly polished blackish oral margin, densely grey pollinose; postocular ciliation of very short and fine setae, but represented on vertex by several short bristles; several longish bristles on each side of vertex; a few dark long setae on ventral surface of occiput. Ocellar tubercle with pair of short stiff bristles together with a few weaker setae behind. Antenna slightly longer than head, dark brown to black, relative lengths of 3 antennal segments and stylus roughly 4:3:8:3. Clypeus polished dark brown; labrum 1.5X as long as head, dark brown to dark reddish brown; maxillary palpus dark brown with a few setae basally and bearing black apical seta.

Thorax. Mesonotum black to blackish brown, brown on humerus and postalar callus, densely blackish brown pollinose; mesonotum almost monochromatic, but viewed anteriorly with very obscure paler stripes hardly visible on one specimen. Chaetotaxy: Bristles and hairs all black; acrostichals absent, uniserial dorsocentrals short, fine and scarce in number, ending in prescutellar bristle that is as long as scutellum; humerus with 1—3 short bristles and a few weak setae; notopleural depression with 5—7 fairly strong bristles, of which 4—5 posterior ones arranged in oblique line, and 1—2 on anterior part together with weak short setae; 1 fairly strong supra-alar, 1 similar postalar bristle with a few setae in front; scutellum with 6 bristles, two inner pairs equally strong. Antepronotum with transverse row of short strong bristles; proepisternal and laterotergal setae all black; prosternum bare.

Legs rather thick and blackish brown to black, bristles and hairs all black. Coxae thinly dark grey pollinose, bearing moderately strong distal bristles, and vertical row of strong bristles on cx2 and cx3; cx1 short setose anteriorly. Femora short setose dorsally, bearing dense subpennate pv bristles on apical 0.33; pennate bristles slightly shorter than f thickness, those on f1 more weakly pennate than on f2 and f3; femora also with av row of short setae, those near apex stronger and bristle-like; ad setae of f2 and f3 dense and more or less subpennate. Tibiae short setose; t1 and t2 with ad and pd rows of several bristles at most as long as thickness of tibiae pd bristles shorter and scarce in number; t3 with similar ad and pd bristles strong and slightly longer than t3 thickness. Fore and mid tarsi slender, metatarsi with double row of ventral bristles; hind metatarsus more or less swollen, as thick as t2 apical part, and 0.5X as long as t2, bearing 2—3 ad, pd, av and pv bristles, pd ones weak.

Wing ( Fig. 3 F) broad, slightly less than 3X as long as wide, widest at middle, only weakly tapered to round apical part; wing strongly infuscated, darker towards costa, veins dark brown; veins M1, M2 and M4 reaching wing margin; outer margin of cell r2+3 0.6–0.75X as long as cell r4; basal angle of cell r4 almost rectangular, vein R4 gently curved posteriorly around basal 0.33. Halter blackish brown with brown shaft.

Abdomen blackish brown, thinly dark grey pollinose, subshining, and clothed with black setae; dorsal setae of terga short, lateral setae of 3 anterior terga long.

Length: Body 6.5—7.5 mm; wing 8.2—8.8 mm.

Distribution. China (Fujian).

Specimens examined. 1 Ψ, Kuatun (2300 m) 27, 40 n. Br. /117,40 ö. L.J. Klapperich/ 12.4.1938 (Fukien) // Spec. typ. // Pl. manda/ rina/ Frey [hand-written by R. Frey]// // [PARALECTOTYPE]/ Empis (Planempis) / mandarina Frey, 1953 / designated by / T. SAIGUSA, 2012 (ZFMK); 1 Ψ, Kuatun (2300m) 27, 40 n. Br. /117,40 ö. L.J. Klapperich/ 30.4.1938 (Fukien)// // [PARALECTOTYPE]/ Empis (Planempis) / mandarina Frey, 1953 / designated by / T. SAIGUSA, 2012 (ZFMK); 1 Ψ, Kuatun (2300m) 27, 40 n. Br. /117,40 ö. L.J. Klapperich/ 12.4.1938 (Fukien)/ / // [PARALECTOTYPE]/ Empis (Planempis) / mandarina Frey, 1953 / designated by / T. SAIGUSA, 2012 (ZMH).

Remarks. As stated in the above section on the original type series, the species represented by the females from Kuatun, Fujian are not conspecific with the lectotype male of E. mandarina from the same locality. The female specimens appear to be almost conspecific with male specimens from the Bishop Museum as discussed above. These males have the flat-topped type of male genitalia, therefore the females undoubtedly belong to the subgenus Planempis .

These males are different from E. mandarina in the black legs with dense stiff av setae on femora. The males are somewhat similar to E. lindebergi sp. nov. described above, but differ from the latter in the thicker legs, femora with densely set stiff av setae towards tip, the dorsal process of cercus slender and without ventral drooping in lateral aspect, and the epandrial lobe furnished with strong spine-like bristles along posterior margin. The males are easily distinguished from E. janssoni sp. nov. by the uniserial dorsocentrals and the absence of the acrostichals, besides different shape of the male genitalia.

Figures

FIGURE 3. Wings of Empis (Planempis) spp. A: E. (P.) mandarina Frey, lectotype male; B: E. (P.) lindebergi sp. nov., holotype male; C: E. (P.) janssoni sp. nov., holotype male; D: ditto, paratype female 1; E: ditto, paratype female 2; F: E. (P.) sp. female syntype of E. (P.) mandarina sensu Frey from Kuatun.