Cyclolabus HEINRICH, 1935

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 : 1448-1449

5. Cyclolabus HEINRICH

Cyclolabus HEINRICH 1935 - Dt. Entom. Zeitschr.: 198.

Type species: Platylabus nigricollis WESMAEL.

Cyclolabus: TOWNES 1951 - Hym. of A. North of Mexico: 280.

Cyclolabus: HEINRICH 1962 - Syn. Nearct. Ichn. Sten.: 756-772.

Cyclolabus: TOWNES et al. 1965 - Cat. Reclass. East. Pal. Ichn.: 513-514.

Cyclolabus: TOWNES H. & M. TOWNES 1966 - Cat. Reclass. Neotr. Ichn.: 273.

Cyclolabus: HEINRICH 1974 - Ann. Zool. Wars. 32 (8): 143-144.

D i s t r i b u t i o n: Holarctic, Neotropical and Oriental Regions.

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

The genus is distinguished by small, roundish or almost circular spiracles of propodeum, in combination with transversal (not oblique), rather large gastrocoeli and thyridia with interval narrower of each of them for most species. The width of gastrocoeli, nevertheless varies within the genus. For some species interval is equal by breadth to gastrocoeli, or even wider. Horizontal surface of propodeum in the middle is often two times shorter than length of area posteromedia. The genus is relative to Platylabus and differs by form of spiracles. The morphology of gastrocoeli and thyridia differs Cyclolabus from Ectopius WESMAEL and Linycus CAMERON with small and circular spiracles (as Afrectopius HEINRICH ). All species are small, 6-8 mm by length.

M o r p h o l o g y:

F l a g e l l u m: Of female bristle-shaped, beyond middle scarcely widened and flattened ventrally. Flagellum practically equal by length to front wing. Flagellum of male with distinct tyloides.

H e a d: Head contour from front roundish. Temples behind eyes from above from slightly to strongly roundly narrowed; mandibles with form character to tribe, gradually narrowed to apex; clypeus convex, transversal, with straight front margin and rounded lateral corners, separated from face by deep impression; antennal cavities deep, with distinct tooth between antennal fossae.

T h o r a x: Transverse furrow of pronotum not interrupted by keel; pronotal ridge not thickened; epomiae sharp; pronotal base sharply sinuously curved. Mesonotum strongly convex, with equal length and breadth; notauli sharp in front third; subalarum high, thin, sharpened; sternauli only just marked up to middle of mesopleurae; scutellum high, from above triangle, laterally carinated up to apex. Hind margin of metanotum with projections opposite lateral longitudinal carinae. Propodeum strongly shortened; all carinae of propodeum developed; area dentipara with denticle at apex; spiracles of propodeum small, circular.

L e g s: Long and slender. Claws small, thick sharply curved at apex.

W i n g s: Areolet from quadrangular, practically symmetrical, to pentagonal with very narrow base; radius straight, strongly curved at apex; nervulus interstitial. Front wing shorter than body length.

A b d o m e n: Abdomen of female from above longish-oval, second tergite wider than length at apex, ovipositor distinctly protrude. Petiolus of first tergite strongly flattened at base, from lateral with sharp passage to postpetiolus and strong carinae; from above petiolus gradually broadened to postpetiolus; middle field of postpetiolus sharply carinated. Gastrocoeli deep, transverse, perpendicular to longitudinal axis of a body; thyridia distinct, approached to base of tergite, interval narrow, vary by breadth; lunulae distinct. Hypopygium with longitudinal fold.

C o l o r a t i o n: Main color mainly red or black, or combination of red and black, with traces of white pattern on head and thorax and mainly with white pattern at apex of abdomen.