220 INSECTA. 



Bombyx vinula. They are attached to it by means of a long 

 and slender pedicle. There the larvae live and grow, Avith the 

 posterior extremity of their body involved in the pellicle of the 

 eggs from which they sprung, without preventing the Caterpil- 

 lar from spinning its cocoon ; but they finally kill it by consum- 

 ing its internal svibstance, when they make their own cocoons, 

 Avhich are placed close together, and at length issue forth imder 

 the form of Ichneumons. 



The larva of another species, the O. moderator. Fab,, de- 

 stroys that of another Ichneumon, the Pimpla strobilellce. Fab. * 



BaxVChus, Fab. 



Similar as to the antennae, but the abdomen of the females is nar- 

 rowed at the end and terminated in a point f . 



Helwigia. 



The port of the preceding Insects, but the antennae thicker near the 

 extremity %. 



Sometimes the abdomen is rather flattened than compressed, being 

 either somewhat oval, or almost cylindrical, or fusiform. 



In these, the abdomen is considerably narrowed at base in the man- 

 ner of a pedicle, 



JoppA, Fab. 



The Joppa are removed from the following subgenera by their an- 

 tennae, which are widened or thickened anterior to the extremity, and 

 then terminate in a i)oint §. 



Ichneumon proper. 



Where the head is transversal and the abdomen somewhat oval, and 

 almost equally narrowed at both ends. 



Panzer has separated generically, under the name of Tragus, those 

 species in which the scutellum forms a conical tubercle, and the abdo- 

 men presents deep transversal incisures ||. 



Alomya, Fab., 



Where the head is narrower and more rounded, with the abdomen 



more widened near its posterior extremity. 



An Ichneumon inhabiting France, and which appears to us 

 nearly allied to the femoralis of Gravenhorst — Ichn. Pedem., 

 No. 136 — and otherwise closely approximated to the Alomyae, 

 is remarkable for its pyramidal head with an anterior elevation 

 bearing the antennae. It might form the type of another sub- 

 genus — Hypsicera \ 



* Fab., Syst. Piez. ; and Encyc. Method., article Ophion. 



t Fab., Ibid. 



X See the Bullet. Univers. des Sc. of Baron F^russac. 



§ Fab., Syst. Piez. 



II Fab., Ibid., and Panz. Hymenopt. 



15 The same works. 



