CLASS V. INSECTA. 269 



Division I. — Abdomen xc'dli Jive very distinct segments. 



Suljdivision 1. — Superior zvings 'with t he first submarginal cell -very large, 

 the two discoidal cells situated longitudinally, one above the otlicr. 



Genus 429. ICHNEUMON. Latr., Leach. 

 Maxillarr/ palpi with very unequal joints; oviduct with its base not co- 

 vered by a large scale, exsertcd. 



[This Genus consists of several natural genera; but the charac/- 

 ters are obscure, and are not yet fully understood. The following 

 divisions are proposed by Latreille, who has submitted these in- 

 sects to a scrupulous and daily investigation. 



Division A. 



Abdomen but little or not at all compressed. 



Subdivision a. 



Extremity of the abdomen of the female compressed and obliquely trun- 

 cated : oviduct exserted. 



1, '* Abdomen cylindric, with a very short peduncle. 

 Genus Pxmpi.a of Fabricius. 



o ** Abdomen somewhat ovoid, with the peduncle long, slender, and 

 arcuate. 



Genus Cryptus of Fabricius. 



Subdivision b. 



Extremity of the abdomen of the female slightly compressed, not ob- 

 liquely truncated: oviduct scarcely prominent or exserted. 



3. * Abdomen cylindric, almost sessile. 



Genus Metopius of Panzer. Pelastes of Illiger. 



4. ** Abdomen almost fusiform or cylindric, gradually narrower to- 



wards the base; the peduncle not slender or arcuate. 

 Genus Alomya of Panzer. 



*** ... 



arcuate. 

 Genus Ichneumon of Fabricius 



Division B. 

 Abdomen very much compressed. 



6. * Apex truncate in the females. 



Genus Ophiox of Fabricius. 



0. "^* Abdomen ellipsoid or ovulate, with the peduncle shndir and 



I . 



** 



Abdomen with the apex pointed. 

 Genus Bam.;uus of Fabricius.] 



