Asthenolabus HEINRICH, 1951

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 : 1505-1506

24. Asthenolabus HEINRICH

Stenolabus HEINRICH 1935 - Dt. Entom. Zeitschr.: 197.

Type species: Platylabus latiscapus THOMSON ; Name preocc. by RECHBERG 1910.

Asthenolabus HEINRICH 1951 - Bonn. Zool. Beitr. 2: 240.

Asthenolabus: HEINRICH 1962 - Syn. Nearct. Ichn. Sten.: 772.

Asthenolabus: TOWNES et al. 1965 - Cat. Reclass. East. Pal. Ichn.: 514, 600.

Asthenolabus: HEINRICH 1974 - Ann. Zool. Wars. 32 (8): 169-170.

D i s t r i b u t i o n: Holarctic, Oriental Region.

I n t r o d u c t i o n:

In contrast to Cyclolabus , it possesses long and narrow sickle-shaped spiracles, in contrast to Platylabus gastrocoeli and thyridia are atrophied.

M o r p h o l o g y:

F l a g e l l u m: Of females always very long and slender, not widened and strongly attenuated toward apex; of males normal, without notches between segments, without tyloides with the exception of canadensis ( HEINRICH 1962).

H e a d: Head contour from front roundish, genae from front roundly narrowed; temples from above smoothly, roundly narrowed behind eyes; mandibles with form character to tribe, gradually narrowed from base to apex; clypeus convex, transversal, with form character to Platylabini , with straight front margin and rounded lateral corners.

T h o r a x: Transverse furrow of pronotum not interrupted by keel; pronotal ridge not thickened; epomiae sharp; pronotal base with gradual, but sharply curved backwards front margin. Hind margin of metanotum with triangle projections. Scutellum comparatively slightly elevated and carinated laterally. Propodeum from lateral strongly and gradually slanting backwards, carinae developed with exception of costulae; area dentipara without tooth at apex; spiracles large, long.

L e g s: Slender, hind femora thickened.

W i n g s: Areolet quadrangular, symmetrical; radius slightly sinuous. Front wing distinctly shorter than body length.

A b d o m e n: Abdomen from above longish-oval; sheath of ovipositor protrude behind apex of abdomen. Petiolus at base slightly wider than height, without sharp bend, from above slightly broadened to postpetiolus; petiolus slightly carinated; middle field of postpetiolus not developed. Gastrocoeli only just impressed, thyridia atrophied, interval many wider than gastrocoeli; lunulae small, distinct. Hypopygium of females with sharpened apex and slight longitudinal fold.

C o l o r a t i o n: Head and thorax black with limited white pattern; abdomen black or partially red; of type and relative species last tergite of females with distinct white anal spot in contrast to Platylabus .