1903.] NATURAL SCIENCES OF PHILADELPHIA. 573 



with a median blackish l^and; legs red without black markings, even 

 the C0X8B all red; wings yellowish-smoky; stigma dull ferruginous; 

 basal nervure ending a short distance basad of transverso-medial ; 

 abdomen red without yellow spots, hind margins of segments more or 

 less golden; first segment with a median black bell-shaped mark; 

 pygidium narrowly rounded at end. 



Hab. — Santa Cruz Mts., Cal., one in U. S. Nat. Museum. Differs from 

 N. corvallisensis by its lighter color and narrower and much more finely 

 sculptured mesothorax; from N'. oregonica by the absence of yellow 

 spots on sides of second abdominal segment the venation and the im- 

 maculate face and pleura. The name tintmnahulum refers to the bell- 

 shaped mark. 

 Nomada atrofrontata, sp. n. 



9 . — Length about 8 mm. ; rather dark red, marked with black, little 

 hairy (hair on scutellum dark, on sides of metathorax white) ; eyes pale 

 greenish-gray; facial quadrangle a little broader than long, scarcely 

 narrowed below ; extreme lower corners of face yellowish ; front black 

 from antennae upward, and over to cheeks, leaving the orbital margins 

 (broadly except at top of eyes, where narrowed to a line) red; antennae 

 red, except the small second joint, which is dark, contrasting with the 

 others ; flagellum suffused with bluish-gray; third antennal joint a very 

 little longer than fourth ; mesothorax very densely and minutely pmic- 

 tured, with a broad median black band; scutellum with a narrow 

 median black band; metathorax with a broad band; sides of pro- 

 thorax (except tubercles, which are yellowish) black; area between 

 wings and middle and hind coxae black ; legs red, coxae with much black ; 

 wings smoky, stigma dull ferruginous; second submarginal cell large, 

 quadrate, nearly square, parallel-sided ; third narrowed almost to a 

 point above; basal nervure ending a considerable distance basad of 

 transverse medial; abdomen rather broad, shining, convex, red with 

 obscure yellow spots on sides of third, fourth and fifth segments, and 

 a pair on dorsum of fifth; third and fourth segments with some median 

 blackish suffusion; first segment with a broad black band on each side. 



Hah. — "So. Cal.," one in Coll. Acad. Nat. Sciences Phila. Allied 

 to A'', ultima, CklL, but the head is not so broad, and the proportions 

 of the third and foiu'th antennal joints, and the venation, are very 

 different. 

 Nomada excellens, sp. n. 



? . — Length about 11 mm.; rol^ust, red marked with black. Head 

 and thorax quite hairy, the hair of the dorsal parts pale brownish, that 

 of the sides and under parts dull white; eyes pale yellowish-green; 



