232 ASHMEAD [226] 



Genus Enizemum Forster. 



EXIZEMl'M TIBIALE (Cresson). 



JSassus tibialis CRESSOX, Trans. Am. Ent. Soc., II, p. no, ?, 1868. CRESSON, 



Syn. Hym. North Am., p. 214, 1887. 

 Enizfinum tibialc I)A\'IS, Trans. Am. Ent. Soc., XXII, p. 27, $ rj\ 1895. 



Type in collection of the American Entomological Society. From 

 St. Paul Island (Fur Seal Commission). Occurs also in Canada, 

 Montana, Colorado, Kansas and Illinois. 



Genus Hoinotropus Forster. 

 IIOMOTROPUS ALASKENSIS sp. nov. 



Female. Length 5.5 mm. Black; a spot just above clypeus, the 

 clypeus, mandibles, scape and pedicel beneath, a band on each side of 

 the mesonotum, a spot in front of tegula? and a line beneath, most of 

 the coxa? and trochanters, the venter, and the second and third dorsal 

 sutures of abdomen more or less lemon-yellow; basal half of hind 

 coxa,' and the front and middle coxae basally, black ; remainder of legs 

 mostly ferruginous, the front and middle femora and tibia? more or less 

 streaked with yellow, the basal joints of trochanters and all femora at 

 base beneath fuscous. Wings hyaline, the stigma, except along the 

 outer margin, yellowish, costoe and internal veins brownish. Abdomen, 

 except the first and second segments and the base of the third, smooth 

 and shining; first and second segments rugulose, the first the more 

 coarsely, the third feebly sculptured at base only. 



Type. Cat. Xo. 5669, U. S. Xat. Museum. From Popof Island, 

 July 10, 14. Five specimens. 



Tribe ORTHOCENTRINI. 



Genus Synoplus Forster. 

 SYXOPLUS BREVIPEXXIS sp. nov. 



(IM. xi, fig. 2.) 



Female. Length 2.^ mm. Polished black; mandibles rufous; 

 palpi pale fuscous, the last joint sometimes darker; legs ferruginous, 

 tin- femora and hind coxa? usually, but not ahvavs, obfuscated, the 

 trochanters and tiltial -purs pale yellowish. 



Antenna- 2 1 -jointed, usually light brownish with the scape and 

 terminal joints darker or fuscous; the iirst joint of the tlagellum is 

 the longest, a little lunger than the second, or about 2 l /% times as long 

 as thick at apt-x, the following joints to the seventh very imperceptibly 



