ICHNEUMOXIDJE. 



195 



is widely distributed, and in Cuba, according to Cresson, it 

 devours tlie eggs of Periplaneta Americana. 



The genus Aulacodes of Cresson, "forms a very close con- 

 necting-link between the minute Ichneumons and the Elvaniae," 

 A. nigriventris Cresson (Fig. 124, a; 6, metathorax ; c, inser- 

 tion of the abdomen) lives in Cuba. 



Fortius is quite a different genus, as the abdomen is very long 

 and slender. Foenus jaculator Linn, is known in Europe to 

 frequent the nests 

 of Crahronid(i2 , 

 ovipositing in the 

 larvae. 



Pelecinus is a fa- 

 miliar insect, the im- 

 mensely elongated, 



linear abdomen of -^ j i % 



the female easily Fig. 125. 



distinguishing it. The male is extremely rare ; its abdomen 

 is short and clavate. It strikingly resembles Trypoxylon, 

 though the abdomen is considerably larger, Pelecinus poly- 

 cerator Drury (Fig. 125, $ and ?) is widely distributed 

 throughout this country. 



The genuine Ichneumonidce have long, straight, multiarticu- 

 late antennae. The first subcostal (cubital) cell of the fore- 

 wings is united with the median 

 cell lying next to it, while the 

 second is very small or wholly 

 wanting. There arc two recurrent 

 veins. Mr. Cresson has described 

 the genus EipJiosoma (Fig. 126), 

 Tig. 126. which he states may be known by 



the long, slender, compressed abdomen, and the long posterior 

 legs, with their femora toothed beneath the tips. E. annu- 

 latum Cresson, a Cuban species, is, according to Poe}^, "para- 

 sitic upon a larva of Pyralis." (Cresson.) 



In Ophion the antennae are as long as the body, the abdo- 

 men is compressed, and the species are honey-yellow in color. 

 0. macrurum Linn. (Fig. 127) attacks the American Silk- 

 worm, Telea Polyphemus. Anomalon is a larger insect and 

 usuall}^ black. A. vesparum is, in Europe, parasitic on Vespa. 



