AMERICAN HYMENOPTERA. 45" 



Ifaacl nearly as wide as thorax ; eyes not approximate ; labrum 

 large ; mandibles long in the males. 



Ilody slightly villose ; emargination of first segment of abdomen 

 very slight; the four posterior femora unarmed, thickened in males. 



J II hah its JCurope. 



Lanceolate cell closed in middle. 



4. ZAKEA, Leach. > 



Zftrcn, Loach, Zool. Misc. 

 Terithrcdo, Spec, Jurine, Fab., &c. 



Wings as in Cimbex, excepting that the lanceolate cell is closed ; 

 they are generally fasciate ; the stigma is wider. 



Aiifeniise 6-articulate, third article long, slender and curved ; fifth 

 and sixth fonuing an obtuse club. 



Head small, much narrower than thorax; eyes united behind in the 

 male; maxillary palpi having the three first joints short, the three 

 others elongate ; nasus retracted ; labrum advanced. 



Body glabrous; abdomen as in Cimbex, but rather more ovate and 

 flattened, with deeper sutures in females ; basal plates not emarginate. 



Legs slender; femora of males not incrassate; tibiae with two obtuse 

 apical spurs. 



1. Z. infiatus. 



Znrcn infiatus, I^ortoii, Proc Bost. Soe. viii, l.jl, 9 • 

 Greenisli-black ; abdomen blue-black, obovate, glabrous; apex of basal mem- 

 brane whitish; legs testaceous; wings fasciate. Length 0.48. Br. wings 1.00 

 incli. 



9 . Head and thorax metallic, greenish black ; antennte black, api- 

 cal joints piceous beneath, apical joint of club longest; head coarsely 

 punctured, and, with the prothorax and pleura covered with whitish 

 hair; eyes large, reniform, partly inclosing ocelli and base of antennae; 

 nasus not so much retracted as in Trichiosoma, with a sinuous edge 

 and large fovea behind; thorax sparsely, abdomen finely punctured ; 

 collar and abdomen blue-black ; the cenchri at sides of post-scutel, or- 

 dinarily round, are oval and lengthened ; base of metathorax and of 

 basal membrane whitish ; abdomen flattened, sutures distinct, curved ; 

 each of the five apical segments having in the middle a transverse glau- 

 cous band of fine hair, greenish beneath, the basal segments beneath 

 and the legs brownish-yellow ; coxae at base and a band in middle of 

 femora black ; wings hyaline, nervures and stigma yellow testaceous ; 

 apex of superior wings, a broad band at tlu; stigma and a dense darker 

 spot fuscous. 



Karmington, Conn. One specimen. 



Mr. Walsh informs me that he has both B $ from Massachusetts. 



