578 PROCEEDINGS OF THE ACADEMY OF [Aug., 



rowing to a line which ends at level of antennae ; the face-markings are 

 almost as in N. sayi, Rob., but the face is not so densely covered with 

 hair as in that species; scape hairy, black, with a red spot at base in 

 front; fiagellum long, rather crenulated, dull reddish-brown beneath, 

 blackish above; third antennal joint hardly more than half length of 

 fourth, wdiich is unusually long; thorax all black, except an obscure 

 reddish spot on tubercles; tegulse shining pale testaceous; legs yellow- 

 ish-red, basal parts and femora beneath blackened; first four tibiae 

 with a blackish stripe on the outer side, the stripe on hind tibiae is more 

 obscure; hair on inner side of basal joint of hind tarsi very pale yel- 

 lowish; wings quite long, nearly clear, slightly dusky at apex; stigma 

 dull reddish-brown; second submarginal cell square, not in the least 

 narrowed above ; third narrowed almost to a point above ; basal nerv- 

 ure ending a short distance basad of transverso-medial ; abdomen 

 rather narrow, shining yellowish-ferruginous ; basal two-thirds of first 

 segment black ; second segment blackish basally at sides ; second, third 

 and fourth segments with yellow lateral spots, easily overlooked be- 

 cause of the yellowish-red of the abdomen ; sixth segment with a very 

 obscure short yellowish band; apical plate strongly bifurcated at end, 

 with two sharp points; venter pale red without markings, the first 

 segment mainly black. 



fjah.—"^o. Cal.," one in Coll. Acad. Nat. Sciences Phila. Allied 

 to A'', sayi, Rob. 



Nomada elegantula, sp- n. 



9 . — Length about 6 mm. ; head and thorax black, moderately hairy; 

 facial quadrangle nearly square, a little narrowed below; labrum dark; 

 mandibles, narrow anterior margin of clypeus, and extremely narrow 

 stripe on anterior orbits nearly up to level of antennae, pale ferruginous 

 suffused with yellow ; scape black with a large red basal batch in front ; 

 fiagellum ferruginous beneath,- dark brown above, except first (third 

 antennal) joint, which is red, with the margin prominent; third an- 

 tennal joint a trifle longer than fourth; thorax black without light 

 marks except the reddish tubercles ; legs red ; anterior and middle fem- 

 ora with a black stripe above and beneath ; anterior and middle tibiae 

 blackish behind; hind legs black or nearly so, femora beneath at apex, 

 and tarsi beneath in middle, red; wings rather long, nearly clear, apex 

 dusky; stigma practically black; second submarginal cell square, not 

 narrowed above; transverso-medial nervure a little basad of end of 

 basal; abdomen narrow, bright coppery-red; base and sides of first 

 segment, spots on extreme lateral margins of second and third (followed 



