1903.] NATURAL SCIENCES OF PHILADELPHIA. 563 



thorax very densely punctured, abundantly clothed with pale ferrugi- 

 nous hair; face broad; occiput and front (except a red patch below 

 middle ocellus) black; face up to level of antennae (except narrow edges 

 of supraclypeal mark and line half-way down edge of clypeus) red, the 

 red lateral face-marks continuing above very broadly until a point 

 about level with end of scape, where they are much narrowed and 

 notched, thence continuing over eyes, and suddenly broadening to 

 form a broad postorbital red band; antennae red, apical half of fla- 

 gellum dusky above; third joint conspicuously longer than fourth; 

 upper margin of prothorax, very narrow lateral margins of mesothorax, 

 scutellum, postscutellum, metathorax except narrow lateral margins 

 and basal enclosure connecting with a smaller apical triangle, tubercles, 

 tegulae and nearly all of pleura, all red ; legs bright red ; basal joint of 

 hind tarsi long and broad, and slightly dusky; wings reddish, nervures 

 dark brown, stigma ferruginous; third submarginal cell much con- 

 tracted above ; basal nervure ending very slightly basad of transverso- 

 medial, the latter very slightly oblique; abdomen ornamented nearly 

 as in A^. superha, but the yellow is orange, and the fifth segment is 

 without black; ventral surface orange with three black bands. 



Hab.—"So. Cal.," four in Coll. Acad. Nat. Sci. Phila. A very dis- 

 tinct and beautiful species. 

 Nomada (Holonomada) hesperia, sp. n. 



cJ^. — Length about 10 mm.; black and yellow. Head and thorax 

 thickly clothed with white hair, very dull above, clear and shining 

 beneath, dense and silvery over clypeus; eyes pale green, converging 

 below; basal half of mandibles, labrum, clypeus and broad lateral 

 face-marks (irregularly notched on inner margin above clypeus, and 

 ending abruptly at about level of antennae), all yellow; no supraclypeal 

 mark; scape thick but not swollen, yellow beneath and black above; 

 flagellum black above and dull reddish beneath (third antennal joint 

 yellow beneath); joint 3 slightly longer than 4; thorax black with a 

 yellow spot on tubercles, but no other yellow; tegulae lemon-j^ellow ; 

 wings clear, nervures dull ferruginous; second and third submarginal 

 cells greatly contracted above; basal nervure ending some distance 

 basad of transverso-medial ; legs yellow in front, largely black behind, 

 especially the hind legs; first joint of anterior and middle tarsi all 

 yellow; anterior femora expanded below into a large yellow lamina, ichicli 

 i< convex anteriorly; abdomen black with five continuous greenish- 

 yellow bands, that on second segment only moderately narrowed in 

 the middle; apical plate dark, entire; ventral surface yellow stained 

 with green, without much black except at base. 



