286 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 84 



Wings deeply infumate, veins and stigma black. 

 Tyije locality. — Siskiyou County, Calif. 

 2V2>e.— U.S.N.IVI. no. 51813. 

 Two females, 



30. EXETASTES RUFIPES Cresson 



Exetastes abdominalis var. a Cressox, Proc. Ent. Soc. Philadelphia, vol. 4, 



p. 277, 1865; female. 

 Exetastes rufipes Cresson, Proc. Ent. Soc. Philadelphia, vol. 4, p. 277 (note), 



1865; female. 



Differs structurally hardly at all from purpureus, but the wings are 

 not so dark, the front and middle legs beyond the trochanters are 

 entirely red, and the hind tibia is red at base, this color extending 

 nearly to apex below. 



The hitherto undescribed male has the temples more strongly con- 

 vex, the wmgs subhyalme, and joints 2-4 of the hind tarsus yellow. 



Type locality. — Colorado. 



Type. — Acad. Nat. Sci. Philadelphia no. 1613. 



Remarks. — In addition to the type, I have seen one female compared 

 w4th the type and, like the type, from Colorado; and one male from 

 Mount Adams, Wash., June 26, 1932, A. R. Rolfs. 



31. EXETASTES ORNATUS, new species 



Plate 16, Figure 13; Plate 17, Figure 36; Plate 18, Figure 45; Plate 20, 

 Figures 83, 96; Plate 21, Figure 105 



The group including this and the next five species is characterized 

 by the unusually small clypeus, wliich is distinctly narrower than the 

 face, weakly convex and almost without trace of division into basal 

 and apical portions ; broad head with large eyes and strongly receding 

 temples; short malar space; long, slender, and apically attenuate 

 antennae; slender abdomen with first tergite nearly or quite three 

 times as long as broad; and unusually short ovipositor sheath. 



The present species differs conspicuously from all the others of 

 the group in that the head and thorax are ornamented with yellow and 

 the propodeum and metapleurum in the female are partly ferruginous. 



Female. — Length 12 mm, antenna 11 mm. 



Head much broader than thorax, fully twice as broad as thick 

 medially; temples strongly receding, flat, sparsely punctate; occiput 

 narrow, shallowly concave ; frons shallowly concave, densely punctate, 

 with a more or less distinct median groove; face densely punctate, 

 with a rather wxak median elevation, less than twice as broad as long; 

 clypeus much narrower than face, much broader than long, weakly 

 convex in profile, weakly divided into basal and apical portions only 

 by difference in sculpture, truncate at apex with neither emargination 

 nor median groove; cheeks in front view very short, their extended 

 angle about a right angle ; malar space hardly tw^o-thirds as long as 

 basal width of mandible; mouth almost exactly as broad as face; 



