TREMEX. 



GENERIC CHARACTER. 



Antennae setaceous, inserted on the front, 

 thirteen or fourteen jointed ; mandibles robust, 

 short, denticulated ; labial palpi terminated by a 

 thick, hairy joint; superior wings with two 

 radial cellules, the second incomplete, and two 

 cubital cellules, of which the first is very large, 

 receiving the two recurrent nervures, the second 

 incomplete, not attaining the end of the wing ; 

 abdomen sessile, terminating in a point ; oviduct 

 exserted. 



OBSERVATIONS. 



This genus is very similar to Sirex, from 

 which it was separated by Jurine. It may be 

 distinguished by the smaller number of joints in 

 the antennae, as well as by the number and form 

 of the cellules of the wings. 



PLATE XT^'XII. 



