Carlsonia HEINRICH, 1973

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 : 1460-1461

9. Carlsonia HEINRICH

Carlsonia HEINRICH 1973 - Nat. Canad. 100: 461.

Type species: Linycus perturbator HEINRICH.

D i s t r i b u t i o n: Nearctic. 1 species.

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

Carlsonia belongs to the group of Platylabini with small, short-oval or almost circular spiracles of propodeum along with genera Cyclolabus HEINRICH Linycus CAMERON Neolinycus HEINRICH and Apaeleticus WESMAEL. Carlsonia is differed from all of these four genera by most sharply elongated form of females abdomen, adaptation of females abdomen to deposition of the eggs on specialized host, like number of species from other tribes. Some of the peculiarities are similar to Linycus , like only slightly impressed gastrocoeli, narrower than interval between them, irregularly reticulate rugose, same as interspace between them, and strongly developed at front third notauli.

Head is wider than of both sexes of Linycus , with temples strongly curved not narrowed behind eyes and genae laterally broad and strongly convex; clypeus rather strongly convex. Scutellum is moderately elevated above postscutellum and of females from lateral slightly carinated up to middle, of males more strongly carinated up to apex; area superomedia short, of females almost three times wider than length in middle.

M o r p h o l o g y:

F l a g e l l u m: Bristle-shaped, moderately long, flattened ventrally beyond middle but not widened, with white annulus. Flagellum equal by length to front wing. Flagellum of male with longish-oval light-colored tyloides.

H e a d: Head contour from front roundish, slightly narrowed downwards, from above strongly transversal, some more than two times wider than length. Temples convex, long; occipital and hypostomal carinae meeting on mandible base; malar space shorter than mandible base width; mandibles with form character to Platylabini , behind base gradually narrowed to apex; clypeus convex with straight front margin, distinctly separated from face by impression; antennal cavities not big, deep, with slight tubercle between antennal fossae.

T h o r a x: Transverse furrow of pronotum not interrupted by keel; pronotal ridge not thickened; pronotal base gradually uniformly curved. Mesonotum strongly convex, only just longer than width, notauli distinct up to middle; subalarum narrow; scutellum moderately elevated above postscutellum, gradually sloping backwards, laterally carinated. Hind margin of metanotum with projections opposite lateral longitudinal carinae. All carinae developed, with exception of carina, limiting coxal area; areae dentiparae without apophysises, only with small denticles; spiracles of propodeum small, roundish.

L e g s: Long and thin.

W i n g s: Areolet pentagonal, asymmetrical, narrow in front. Front wing considerably shorter than body length.

A b d o m e n From above long, elongated, almost parallel sided. Petiolus only just wider than height; first tergite from lateral angulate, with sharp passage to postpetiolus and strong lateral carinae, from above gradually broadened to postpetiolus; middle field of postpetiolus limited by strong carinae. Gastrocoeli long with cellular sculpture; thyridia slightly expressed, but distinct, strongly removed from base of second tergite; lunulae distinct, large; second tergite almost parallel sided, at front half cellulate, third tergite some longer than width, also parallel sided same as subsequent tergites.