380 CLASS VIII. 



Bracon FABK. (in part), LATR. Clypeus exscinded, a hiatus 

 being left above the mandibles. Maxillary palps quinquearticulate. 

 Head transverse or subglobose. 



Sp. Bracon impostor NEES, Bracon denigrator FABK. (excl. syn. L.), 

 PANZER, Deutschl. Ins. Heft 45, Tab. 14, &c. 



Rogas NEES. (See WESTWOOD, 1. 1. p. 64 for other sub-genera). 



Sigalphus LATR. (Chelonus JURINE). Clypeus entire. Abdo- 

 men fornicate beneath, triannulate above, or continuous, no vestige 

 of incisures remaining, with all the segments united into one. 

 Maxillary palps sexarticulate, labial shorter, quadriarticulate. 



Sp. Sigalphus irrorator, Cryptus irrorator FABR., DE GEER, Ins. I. Tab. 36, 

 fig. 12 ; GUERIN, Icognogr., Ins. PL 68, fig. 9 (in this figure the division 

 of the nervures in the wings is incorrectly represented as though there 

 were a second recurrent nerve, as in the Ichneumones genuini) ; 4^ lines 

 long ; expanded wings 8 lines ; abdomen glistering at the extremity with 

 brownish green from fine smooth hairs, wings brownish with blacker exter- 

 nal margin and a white spot in the middle under the radial cell. The 

 larva, according to DE GEER, lives in the caterpillar of Noctua psi, 1. 1. 

 P- 577- 



Helcon NEES. 

 Microgaster LATR. 



Note. For other genera and sub-genera, here omitted 011 account 

 of our limited space, the works recommended above may be con- 

 sulted. 



B. Ichneumones genuini. Recurrent nerves two, one dividing 

 the area situated under the cubital cells. First cubital cell large, 

 confluent with the first discoidal cell ; second cubital cell rhombic, 

 pentagonal or trigonal, very small, in some none. Maxillary palps 

 with five joints, labial palps with four joints. 



In this division no such small species occur as in the preceding 

 (ex. gr. the genus Aphidiua). The larvae live principally in cater- 

 pillars. Some species do not lay their eggs in the caterpillars, but 

 fasten the eggs, which are provided with a pedicle for the purpose, 

 on the skin of the caterpillars. See HAKTIG, Ueb. d. qestielten Eier 



J- t/ 



der Schlupfwespen, WIEGMANN'S Archiv, 1837. s. 151 158. Taf. iv. 



GRAVENHORST has described more than 1600 species of Ichneumones genuini ; 

 a number which will be continually increased by fresh observers. 



