Cheiloneurus amadeus, Noyes, 2023

Noyes, John Stuart, 2023, ENCYRTIDAE OF COSTA RICA (HYMENOPTERA: CHALCIDOIDEA), 4 Subfamily Encyrtinae: tribes Arrhenophagini, Habrolepidini, Cerapterocerini, Cheiloneurini, Trechnitini, Cercobelini, Polaszekiini, Protyndarichoidini, Gahaniellini and Syrphophagini (part), mainly primary parasitoids and hyperparasitoids of Coccoidea and Psylloidea (Hemiptera), Taxonomic Monographs on Neotropical Hymenoptera (Oxford, England) 2 (11), pp. 1-921 : 300-302

Cheiloneurus amadeus sp.nov.

( Figs 742-747)

DIAGNOSIS. Female (length about 1.4mm): body more or less completely dark brown with a weak to moderate metallic sheen; antenna ( Fig. 744) with scape mostly white with dorsal and ventral margins largely brown; pedicel and flagellum dark brown; mesoscutum with a narrow, transverse line of dense silvery setae subparallel to posterior margin of pronotum; coxae dark brown; legs otherwise mostly dark brown; fore wing ( Fig. 746) mostly infuscate with a well-defined, V-shaped hyaline area in basal cell, a small hyaline area at apex of venation which virtually connects with a larger hyaline area opposite, two or three paler, virtually hyaline, longitudinal streaks from apical margin connect with this paler transverse line; head ( Fig. 747) about 4.0X as wide as frontovertex, in facial view clearly longer than broad, suboval, genae converging, slightly curved, but more strongly curved inwards near mouth; frontovertex with a single seta medially between anterior ocellus and scrobes; eye separated from scrobe by slightly more than diameter of anterior ocellus, area between eye and scrobe with shallow, irregular, polygonally reticulate sculpture; scrobes deep, sharply margined, carinate below eye; interantennal prominence with about 35 inconspicuous setae and dorsally rounded and without a median ridge; mandible with one tooth and a broad truncation; antenna ( Fig. 744) with scape about 4.3X as long as broad; F1-F3 slightly longer than broad, F4-F6 quadrate or transverse; linear sensilla on F3-F6; clava 3-segmented, slightly longer than F4-F6 combined; sensory area enlarged, extending ventrally nearly 0.5X length of clava, apex obliquely truncate; head width about equal to flagellum length; mesoscutum in anterior half with longitudinally elongate striate-reticulate sculpture which is delimited by a line of silvery setae, posterior half with fine, fairly uniform, polygonally reticulate sculpture; scutellum with a distinct, apical tuft of setae; wings fully developed, fore wing ( Fig. 746) about 2.6X as long as broad; parastigma downcurved; costal cell dorsally naked, ventrally with a complete line of setae in proximal 0.7X, apex naked; area below proximal part of parastigma with a group of about 14-17 setae; apices of postmarginal and stigmal veins connected by a naked hyaline area that continues a little way into disc ( Fig. 743); apical bristle of postmarginal vein at least about 0.6X as long as marginal vein; mid tibial spur slightly longer than basitarsus; propodeum with about seven inconspicuous setae adjacent to spiracle, side naked; syntergum about 0.8X as long as mid tibia with apex broadly truncate; ovipositor ( Fig. 745) about 5.7X gonostylus or about 1.1X as long as mid tibia; gonostylus about 0.6X as long mid tibial spur; exserted part of ovipositor about 0.3X as long as mid tibial spur. Male: unknown.

Female (holotype): length, including ovipositor, 1.43mm; excluding ovipositor, 1.39mm ( CPD) .

Head dark brown; area between occipital margin and posterior ocellus with a moderately strong metallic purple, green and blue sheen; area between ocelli and frontovertex relatively dull with a weak brassy sheen with weak purple and green reflections, more purplish immediately above scrobes; temple with a relatively strong blue-green and purple sheen, the purple continued behind eye to vertex; anterior part of gena similar to temple without conspicuous purple areas, posterior part similar but conspicuously duller; area above base of mandible coppery; area between eye and scrobe metallic purple, coppery and green; scrobes shining metallic green and coppery; interantennal prominence margined by a very narrow coppery line dorsally, below this metallic green, a wide purple and brassy area between toruli, this delimited below by a narrow metallic purple, blue and brassy line connecting lower margins of toruli, below this purple, mouth margin coppery; frontovertex clothed with inconspicuous, pale brown setae, these continued as a line below eye; gena and interantennal prominence with moderately dense, short, translucent setae; antenna ( Fig. 744) with radicle orange, dark brown on sides; scape mostly white to very pale, slightly dusky orange, ventral margin dark brown from base to widest part, dorsal margin dark brown, apex dark brown; pedicel and flagellum dark brown, almost black; maxillary palpus dark brown, proximal segments slightly paler brown; thorax dark brown, dorsally virtually black; pronotum and anterior half or so of mesoscutum more or less matt, but with a very slight silky sheen, posterior part of mesoscutum with a weak brassy lustre and distinct metallic, dark blue and purple reflections, anterior, part of mesoscutum with relatively sparse dark brown setae, this area delimited posteriorly by a narrow line of relatively dense silvery setae that runs subparallel to posterior margin of pronotum, posterior part of mesoscutum with only a single, submedian pair of dark brown setae; tegula dark brown with a slight brassy and purple sheen; axilla with dark brown setae; scutellum more or less completely matt with dark brown setae, subapical tuft black; mesopleuron anteriorly with a weak, mixed brassy, blue and green sheen, posteriorly with a distinct coppery sheen; legs almost completely brown to dark brown, mid tarsi orange-brown; fore wing ( Fig. 746) mostly infuscate, largely hyaline towards base; venation brown; propodeum dark brown, virtually black, medially with a weak purple and brassy sheen, area around spiracle with a metallic blue, green, brassy, coppery and purple sheen, 7 or 8 dark brown setae outside spiracle; gaster dark brown, mostly with purple, brassy, coppery and green reflections; visible part of gonostylus slightly dusky orange.

Head ( Fig. 747) about 4X as wide as frontovertex, in profile about 2.0X as high as deep, frontovertex weakly and evenly curved to top of scrobes then slightly angled towards mouth margin and virtually straight from top of scrobes to mouth margin, interantennal prominence slightly protuberant; occipital margin sharp, weakly carinate; ocelli forming an angle of about 75°; frontovertex quite shiny, with shallow, fairly regular, polygonally reticulate sculpture in ocellar area, anteriorly almost imbricate-reticulate and a little transversely elongate, mesh size much smaller than diameter of eye facet, sculpture slightly coarser and more transversely elongate immediately above scrobes; interantennal prominence with moderately deep, quite coarse, regular polygonally reticulate sculpture; temple with very shallow, irregular, longitudinally elongate polygonally reticulate sculpture, posterior part of gena with similar sculpture, anterior part of gena with relatively deep, regular coarse, polygonally reticulate sculpture; area between eye and scrobe hardly wider than diameter of anterior ocellus and with shallow, irregular, polygonally reticulate sculpture; scrobes deep, meeting dorsally, sharply margined, carinate below eye, very broadly ∩-shaped, interantennal prominence dorsally broadly rounded, without a median ridge; antenna as in Fig. 744; scape broadened and flattened, broadest above middle, about 4.3X as long as broad; F1-F3 very slightly longer than broad, F4-F6 quadrate or transverse, segments wider and larger distally so that F6 is largest and widest, linear sensilla present only on F3-F4; clava slightly broadened, a little longer than F4-F6 combined, sensory area slightly enlarged, extending nearly 0.5X along ventral surface, giving it an obliquely truncate appearance; eye not reaching occipital margin, separated by about diameter of facet, clothed with inconspicuous, short setae that are much shorter than diameter of facet; inner eye margins subparallel, narrowest point of frontovertex about midway between anterior ocellus and scrobes; malar sulcus absent; clypeal margin medially weakly protuberant, but protuberant part slightly concave; mandible with one acute tooth and a very broad, hardly concave truncation; apical segment of maxillary palpus not enlarged, about 1.6X as long as radicle. Relative measurements: HW 97, HH 104, FV 25, POL 17.5, OOL 0.5, OCL 11.5, AOL 14.5, EL 61, EW 49, MS 43, SL 43, SW 10.

Thorax with pronotum hardly exposed behind head and about 0.6X as long as mesoscutum; pronotum matt with similar, fairly deep, coarse, regular, polygonally reticulate sculpture that is deeper and of smaller mesh than that between posterior ocelli; slightly more than anterior half of mesoscutum matt, clothed with numerous setae and with longitudinally elongate striate-reticulate sculpture which is delimited by a line of silvery setae, posterior part shiny, with only two setae and fine, relatively shallow, fairly uniform, polygonally reticulate to imbricate-reticulate sculpture; axilla and scutellum with polygonally reticulate sculpture that is conspicuously deeper and coarser than that on anterior part of mesoscutum; visible part of mesoscutum about 2.3X as broad as long; scutellum about 1.3X as broad as long with a distinct subapical tuft, setae mostly about half as long as scutellum; hind femur about 3.9X as long as broad; fore wing with venation and setation as in Figs 743, 746; costal cell naked dorsally at apex; apices of postmarginal and stigmal veins connected by a distinct, naked, hyaline streak ( Fig. 743); mid tibia with a weak, external carina in proximal half; propodeum medially about 0.23X as long as scutellum and smooth. Relative measurements: FWL 81, FWW 31; HWL 76, HWW 19.

Gaster without “gland-like” structures on Gt1 or Gt5; hypopygium ( Fig. 742) reaching about 0.3X to apex; syntergum about 0.8X as long as mid tibia, with apex very weakly rounded, more or less broadly; ovipositor ( Fig. 745) hardly exserted, the exserted part about 0.3X as long as md tibial spur or 0.1X as long as mid tibia. Relative measurements: OL 109, GL 19 [MT 97].

Variation. Only holotype examined.

Male. Unknown.

DISTRIBUTION. Costa Rica.

HOSTS. Unknown.

MATERIAL EXAMINED.

Type material. Holotype E: COSTA RICA, Puntarenas, Pen. Osa , Puerto Jimenez , 8°32’N 83°19’W, 10m, xi.1991 (P. Hanson) . Holotype in NHMUK .

COMMENTS. See comments under dipsas (p. 297), medusa (p. 299), grimus (p. 304), seius (p. 309), poeana (p. 314) and oshtan (p. 316).