CLASS V. IN3ECTA. 269 



Division I. — Abdomen with Jive very distinct segments. 



Subdivision 1 . — Superior wings with the first submarginal cell very lai^ge, 

 the trco discoidal cells situated longitudinalli/, one above the other. 



Genus 4(29. ICHNEUMON. Lutr., Leach. 

 Maxillari) palpi with very uneqyal joints; oviduct with its base not co- 

 vered by a large scale, exserted. 



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

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

 divisions are proposed l)y Latreille, who has submitted these iii- 

 sects to a scrupulous and daily investigation. 



Division A. 

 Abdomen but little or not at all compressed. 



Subdivision a. 

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

 cated,: ot'(V/«c^ exserted. 



1. * Abdomen ci/lindric, zcith a very short peduncle. 



Genus Pimpla of Fabricius. 



2. ** Abdomen somewhat ovoid, with the peduncle long, slender, and 



arcuate. 



Genus Cryptus of Fabricius. 

 SubdivisioJi b. 

 Extremity of the abdomen of the female slightly compressed, not obr 

 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. 



5. *** Abdomen ellipsoid or ovulate, with the peduncle slender and 



arcuate. 

 Genus Ichneumon of Fabricius. 



Division B. 



Abdomen very much compressed. 



6. * Apex truncate in the females. 



Genus Ophion of Fabricius. 



7. **" Abdomen with the apex pointed. 



Genus BA^CIIU5 of Fabricius.] 



