KO. 2340. TRIBE EPHIALTINI OF THE ICHNEUMONINAE—CUSHMAN. 341 



9. Face in female slightly longer than broad at clypeus; malar space only about one- 

 third as long as basal width of mandible ; temples seen from above very sharply 

 eloping, their cephalo-caudad length barely half that of eye ; hind coxae of male 



lilack obesus (Cushman). 



Face in female slightly wider than long, malar space nearly half as long as basal 

 width of mandible ; temples seen from above less sharply sloping, their cephalo- 

 caudad length about two-thirds that of eye; male unknown. Jatus, new species. 



10. Malar space about a third as long as basal width of mandible; tegulae entii'ely 



yellow; apical joint of hind tarsus with complete basal white annulus 11. 



Malar space distinctly more than a third as long as basal width of mandible; 

 tegulae brown at apex; apical joint of hind tarsus with incomplete annulus. 



montana, new species. 



11. Tergites enth-ely black; apex of hind femur blackish; humeral angle of pronotum 



without a white spot Icavitti, new species. 



Tergites narrowly piceous apically ; hind femiu* not black at apex; humeral angle 

 of pronotum with a more or less distinct whitish spot pacificus, new species. 



EPHIALTES (ITOPLECTIS) ATROCOXALIS (Cresson). 



Pimpla atrocoxalis Cresson, Trans. Amer. Ent. Soc, vol. 3, 1870, p. 145, female. 

 Type, Acad. Nat. Sci. Phila., No. 1423. 



Discussion based on homotype female (Viereck), 12 other females, 

 and 6 males. 



This species and the European ovalis Thomson differ from all other 

 species of the genus Ephialtes by the form of the front coxae, a char- 

 acter common to both sexes. In general appearance it resembles 

 EpMaltes more closely than Itojjlectis, but the short malar space, 

 deeply emarginate eyes, location of antennal foramina, short tarsal 

 spines, and the basaliy lobate front claws in the female ally it with 

 Itoplectis. It is very distinct from all other North American species 

 of the latter subgenus in the unannulated tibiae and tarsi, black 

 trochanters, and strongly margined scutellum. 



From ovalis, represented in the United States National Museum 

 by a single female, it differs only slightly as follows: Antennae 

 generally darker; temples more strongly rounded; tegulae pale only 

 at extreme base; carinae weaker and slightly more convergent 

 posteriorly. 



Malar space distinctly less than haK as long as basal width of 

 mandible; clypeus truncate at apex; inner eye margin deeply emar- 

 ginate; face shghtly narrower than vertex; antennae about two- 

 thirds as long as body, rather stout but not attenuate either at base 

 or at apex, the lower margin of their foramina at about middle of 

 eye; front rather deeply concave, strongly punctate; diameter of 

 lateral ocellus greater than length of ocell-ocular line, which is but 

 little more than haK as long as postocellar line; temples narrow, 

 nearly flat; notauli very weakly impressed but indicated well back 

 on the mesoscutum; propodeum rather strongly ridged laterally, 

 polished medially and posteriorly, otherwise confluently punctate. 



