Eurylabini HEINRICH

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 : 1337-1338

Tribe Eurylabini HEINRICH

Eurylabini HEINRICH 1934 - Mitt. Zool. Mus. Berlin: 64, 66, 132.

Type genus: Euylabus WESMAEL.

Eurylabini : HEINRICH 1968 - Ichn. Stenop. of Africa 2: 201.

D i s t r i b u t i o n: Palaearctic, Oriental and Ethiopian Regions.

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

The representatives of tribe are characterized by flat pointed clypeus simultaneously with flattened petiolus of first tergite of abdomen. Flagellum is bristle-shaped, thin, at males with or without tyloides. Scutellum is convex of one or another degree. Abdomen of females is partially elongated and narrow. Gastrocoeli are small, slightly developed but rather distinct. Thyridia are atrophied. Abdomen of females is amblypygous with character, unusually thin, usually curved downwards ovipositor.

M o r p h o l o g y:

F l a g e l l u m: Of females bristle-shaped, very slender, flattened ventrally, but not widened beyond middle, strongly attenuated toward apex. Flagellum of males not nodose, with or without tyloides.

H e a d: In general of normal structure; genae and temples with tendency to swollen, but narrowed at only one African species; clypeus not convex like majority of Platylabini , with more or less slanting lateral sides and straight sharpen front margin (at Eurylabus WESMAEL angular in profile), sharply separated from face; mandibles normal, rather strong, upper tooth slightly longer than lower; middle field of face narrow, strongly elevated above lateral fields; antennal cavities very deeply impressed. Front surface with rough sculpture.

T h o r a x: Mesonotum (in contrast of Platylabini ) more often from distinctly to considerably more longer than width (equal length and breadth of type species), moderately convex ; notauli from only just indicated or not developed, to rather distinct; subalarum high, not sharpened; upper front part of mesopleurae distinctly swollen, lower part separated angularly; sternauli superficial or not developed; scutellum convex in different degree, laterally not carinated. Hind margin of metanotum with broad triangle projections. Propodeum in profile more or less angular, convex in central part; horizontal part of propodeum usually shorter than vertical; structure of propodeum normal in general; area basalis always strongly impressed; areae dentiparae with tendency to form projections or short blunt teeth; carination of propodeum complete, or atrophied in part and changed by coarse rugosity; spiracles large elongated to slit-shape.

L e g s: Moderately long and slender. Hind coxae of females without scopa.

W i n g s: Areolet pentagonal or quadrangular; nervulus interstitial or postfurcal; radius more or less distinctly sinuous; membrane of wing hyaline.

A b d o m e n:Offemalesamblypygous, usually some elongated and rather narrowed, sometimes apex compressed from side. Petiolus of first tergite dorsally flat, wider than height, from above gradually broadened to postpetiolus, from lateral with sharp bend; postpetiolus flat, without distinct median field, spiracles of Eurylabus genus nearer one another than to apex of postpetiolus; gastrocoeli of Eurylabus small but rather distinct, thyridia atrophied; ovipositor unusually thin, usually curved downwards.

C o l o r a t i o n: Most of known species dark colored, with orange or red legs and black or red abdomen without white pattern, sometimes with limited white pattern on head and thorax.