INTRODUCTORY PAPERS ON ICHNEUMONID^. 127 



-+■- *■ Transverse anal nervure not divided. - - - Agrypon. 



oo Eyes hairy. Trichomma. 



b. Claws of tarsi pectinated. 



* Scutellum rather convex ; areolet of wing present. 



•j- Spiracles of 1st abdominal segment placed before the middle. 

 I Spiracles of metathorax elongate or oblong. 



§ Supero-medial area of metathorax distinct. - - Oplieltes. 



§§ Supero-medial area obsolete. - ... Paniscus. 



H Spiracles of metathorax subrotund. - Absyrtus. 



ff Spiracles of 1st abdominal segment placed behind the middle. 



Campoplex. 

 ** Scutellum depressed, subquadrate ; areolet of wings wanting. 



Char ops. 

 B. Spiracles of metathorax circular, rarely subovate. 



a. Areolet of wings minute, subtriangular, subpentagonal, or none. 



* Clypeus not, or imperfectly, separated from the face. 



f Eyes hairy. Cymodusa. 



ft Eyes not hairy. 



I Apex of clypeus produced into a distinct tooth. - Sagaritis. 



JJ Apex of clypeus not toothed. 



§ Eyes against the antennas distinctly emarginate ; area of metathorax 

 most frequently none, or next to none. - - Casiriaria. 



§§ Eyes against the antennas not, or only slightly, emarginate. 

 x Head moderately large. 



o 2nd segment of abdomen transverse. ... Canidia. 



oo 2nd segment of abdomen not transverse. 

 -+■ Head very much buccated; 1st segment of abdomen very short and 



rather stout. Pyracmon. 



-*■- «- Head transverse or subbuccated. 



*■■* Petiole of 1st segment of abdomen slender, not thickened, longer 



than the post-petiole. Limneria. 



•**■•-* 1st segment of abdomen short and rather stout; post-petiole a little 

 shorter than the petiole. - - - Meloboris. 



x x Head much wider than the thorax; abdomen narrow; aculeus long. 



Nemeritis. 

 ** Clypeus separated from the face ; stigma of wing large. 

 u» Abdomen in both sexes compressed ; aculeus long ; wings without 

 an areolet. .... . . Cremastus. 



«»<&> Abdomen in female most frequently compressed ; depressed in the 

 male ; rarely depressed in both sexes ; aculeus of female very 

 short; areolet of wings subpentagonal, triangular, or very 

 incomplete. 

 A Abdomen of male depressed ; 1st segment of abdomen shorter than 

 the coxse and trochanters of hind legs. - - Atractodes. 

 A A Abdomen of both sexes depressed ; 1st segment longer than the hind 

 coxas and trochanters. Exolytus. 



b. Areolet of wings large and rhomboidal ; anal styles of male and 



aculeus of female exserted. .... Mesochorus. 

 B. Radial cell of front wings rather short, subtrapezoid ; radial and 

 discoidal cells almost touching in the middle. 



* Antennas with a moderate space between them ; metathorax scarcely 



shorter than high. Porizon. 



