Coticheresiarches dirus (WESMAEL)

A. M, 2009, Illustrated key to the tribes of subfamilia Ichneumoninae and genera of the tribe Platylabini of world fauna (Hymenoptera, Ichneumonidae), Linzer biologische Beiträge 41 (2), pp. 1317-1608 : 1341-1343

Coticheresiarches dirus (WESMAEL) (Plate 4)

Eurylabus dirus WESMAEL 1853 - Bull. Acad. Sci. Belgique 20: 307.

Coticheresiarches dirus: TOWNES et al. 1965 - Mem. Amer. Ent. Inst. 5: 315, syn. Coticheresiarches dirus: GUPTA 1983 - Contr. Amer. Ent. Inst. 19 (7): 104.

M a l e

F l a g e l l u m: Bristle-shaped, with 38 segments, with densely coalescent segments, moderately stout, first segment fairly short, only two times longer than width at apex, without white annulus, not widened and not flattened beyond middle. Distinct tyloides on male flagellum practically absent, only in the form of weak convexity on segments 13- 21. Flagellum 1,1 times shorter than the front wing and 1,4 times shorter than body length.

H e a d: Head contour from front rounded, strongly narrowed downwards, 1,3 times wider than height, temples from the front visible up to top; genae from front short, 5,8 times shorter than height of eye; head contour from above strongly transversal, 1,8 times wider than length. Vertex from lateral slightly slanting down to occipital carina, between hind ocelli, eyes and occipital carina with sharp, broad impressions; temples long, 1,2 times longer than longitudinal diameter of an eye at the middle, from side parallel to hind margin of eye, from above strongly swollen; occipital carina sharp all round, from above angularly impressed, but far not reach level of eyes and hind ocelli; hypostomal carina not visible from lateral, meeting with occipital carina on the level of lower margin of eye far not reaching base of mandible; length of abscissula equal 0,6 breadth of mandible base width; malar space 1,9 times shorter than the mandible base width; mandibles strong, without teeth, smoothly and quite sharply narrowed from base to apex, from above gradually curved; clypeus small, only just wider than length, slightly convex, strongly unbent forward relatively face, with sharp protrude ahead front margin, sharply separated from middle field of face; clypeal foveae small, deep; labrum equal by breadth to clypeus, roundish, strongly protrude from under clypeus; middle field of face sharply differentiated, narrow, in middle almost two times narrower than lateral fields; antennal cavities quite slightly (moderately) impressed, reach borders of eyes and far not reach level of front ocellus, without tubercles laterally and with strong tooth between antennal fossae; margins of antennal fossae quite high elevated above face surface; ocelli of normal size, diameter of lateral ocellus 1,5 times less than distance from ocellus to eye; ocellar triangle distinctly elevated, especially laterally. Surface of clypeus with big punctures, without microsculpture, face very densely punctured, slightly shining and with visible microsculpture, apical part of frons wrinkled, temples densely punctured, without microsculpture.

T h o r a x: Collar of pronotum short with straight front margin (from above); transverse furrow deep, not interrupted by keel; pronotal ridge not thickened; epomiae very strong, sharp; pronotal base practically straight. Mesonotum moderately convex, 1,2 times longer than width; notauli absent; axillary tongue slightly developed; surface of mesonotum densely punctured, shining, without microsculpture; subalarum high, thin, not sharpened; speculum densely punctured by big punctures (interspaces narrower than the punctures); area of mesopleural fovea sharply impressed; mesopleural suture straight, interrupted by sharp ribs; mesopleurae at bottom with sharp bend; sternauli absent; upper half of mesopleurae very densely punctured to wrinkle-punctured on separate parts, shining, lower wrinkly-punctured with developed microsculpture, slightly shining; scutellum high elevated above postscutellum, with convex horizontal part, laterally carinated. Hind margin of metanotum with broad triangle projections opposite lateral longitudinal carinae. Propodeum from lateral with angular break (of broken type), length of horizontal part 2,1 shorter than length of area posteromedia in middle; carinae of propodeum expressed, with ex- ception of costulae and coxal carina, but not distinct because of general roughly-wrinkled sculpture of surface; basal area short and deep; area superomedia square, rounded in front; area dentipara at apex with flat tooth; spiracles long, along external contour 2 times longer than width. Surface of propodeum, including metapleurae roughly-wrinkled, slightly shining.

L e g s: Strong. Hind tarsi thickened and compressed from side. Claws long, thin, slightly curved, at apex without sharp bend, smooth.

W i n g s: Areolet quadrangular, symmetrical, front veins longer than hind; stigma narrow and dark, radial cell narrow and long, radius sinuous at base and especially at apex; nervulus interstitial; ramulus not developed; all veins dark; membrane of wing darkened. Wings long, length of front wing some longer than length of flagellum and 1,3 times shorter than body length.

A b d o m e n From above longish-oval, apical tergites not hidden. First tergite from lateral with distinct bend between petiolus and postpetiolus; petiolus flattened at base, approximately 1,5 times wider than height, from lateral sharply bordered by carinae and with strong transversal ribs between them; dorsomedian and dorsolateral carinae independently reach base of tergite; middle field of postpetiolus sharply expressed, slightly wider than lateral fields, its surface irregularly wrinkly-punctured with distinct microsculpture. Gastrocoeli deep, slightly oblique, almost perpendicular to longitudinal axis of a body and almost reach to borders of tergite; thyridia distinct, approached to base of second tergite, approximately equal to interval between them; lunulae very distinct, elongated; interval and middle part of tergite to apex very roughly punctured to wrinkled, other part of second tergite with dense punctures and distinct microsculpture, slightly shining; second and third tergites sharply separated; tergites 3-4 densely punctured, apical tergites with superficial punctures. 2-7th sternites completely sclerotized, but with sharp longitudinal fold.

C o l o r a t i o n: Body completely black, only legs partially red: femora of all legs, tibiae of front and middle and tarsi of front legs, middle and hind tarsi darkened.

S i z e: Body length: 12,0; flagellum: 8,7; front wing: 9,5 mm.

F e m a l e

Abdomen of female amblypygous, blunted at apex. Body length 14-16 mm.

B i o l o g y:

In literature, it was recorded as parasite Lymantria monacha L. and L. dispar L. ( GUPTA 1983), but many years investigations of parasites of these phytophages by the author in Byelorussia did not confirm this connection.