412 AMERICAN HYMENOPTERA. 



much more than their diameter from the margins of the 

 eyes ; vertex usually narrow and appearing at least slightly 

 depressed ; third antennal segment as long as, or longer than, 

 the fifth ; malar space usually shorter than its width at the 

 apex ; volsellas of genitalia long and, in the majority of the 

 species, extending noticeably beyond the tips of the squamae ; 

 hind metatarsi with long hind fringes. 



Fore wing of both females and males with the transverse 

 median vein (fig. 14) usually forming an acute inner angle 

 with the median and usually not coalescing at the base with 

 the base of the discoidal vein ; hind wing with transverse 

 median vein (fig. 15). usually curved somewhat, forming 

 nearly a right angle with both the median and the anal vein. 



The two New World groups included in this subgenus 

 may be conveniently and briefly distinguished as follows : 



Females with the disc of the clypeus finely and evenly punctate all 

 over ; the males with the third antennal segment as long as 

 the fourth and fifth taken together Auriconius. 



Females with at least the anterior part of the disc of the clypeus more 

 or less smooth ; the males with the third antennal segment 

 at most not much longer than the fifth Fraternus. 



THE AURICOMUS GROUP. 

 Type. — Bomhis auricomus Robertson. This group is newly 

 established in this paper. 



Characters of the Group. 



Females. — Base of labrum with transverse, narrowly inter- 

 rupted ridge ; clypeus finely and evenly punctate over entire 

 surface. 



Males. — Vertex above ocelli much narrower than space 

 between eyes at ocelli ; flagellum of antennae not more than 

 two and one-third times as long as the scape ; third antennal 

 segment as long as the fourth and fifth taken together ; eyes 

 greatly swollen ; posterior tibiae with outer faces somewhat 

 concaved and covered with very fine short hair, with no bare 

 area ; posterior metatarsi less than three times as long as 

 their greatest width, their outer faces somewhat concaved 

 and finely and evenly pubescent. 



