58 Journal of Entomology and Zoology 
upward as rather narrow bands to about level of antenne; scape 
stout, entirely yellow in front; third antennal joint much shorter 
than fourth, but more than half its length; flagellum thick, bright 
ferruginous beneath, black above, the joints conspicuously dentic- 
ulate; tubercles yellow, but thorax otherwise all black; anterior 
coxe unarmed; legs mainly red, but anterior and middle femora 
yellow in front, anterior femora black beneath, middle femora black 
behind except at apex; hind femora black, with the knees red, and 
a yellow spot at apex in front; hind tibiz suffusedly blackish behind; 
tegule light ferruginous; wings ample, dusky at apex, stigma clear 
red; b. n. going a little basad of t. m.; first r. n. joining second s. 
m. well beyond middle; abdomen bright ferruginous marked with 
black and bright yellow; first segment black with a broad red band 
on which are two obscure dusky spots; all the segments with fuscous 
hind margins, second and third segments intense black at base; 
second to fifth segments laterally with yellow spots, very large on 
second, successively smaller on the others; sixth segment red; apical 
plate strongly notched; venter with two yellow spots on second 
segment. 
Habitat: Mountains near Claremont, California (Baker; Po- 
mona coll. 168). Allied to N. undulaticornis Ckll., but easily 
distinguished by the scutellum, which is not prominent or bigibbous, 
and by many details of the coloration. Also related to N. dentic- 
ulata Rob. 
N. elegantula Ckll. was also taken by Baker at Claremont. 
Exomalopsis velutinus sp. n. 
@ Length about 9 mm.; black, with a rather long, not sub- 
globose, abdomen; head broad, facial quadrangle broader than 
long; eyes gray; blade of maxilla broad to end, the inner half 
(longitudinally) pallid; labrum densely covered with pale ochreous 
hair; clypeus densely rugosopunctate, the lower margin dark red; 
face and front with long dull white hair; vertex smooth and pol- 
ished; flagellum bright chestnut red beneath, except at base; thorax 
with pale ochreous-tinted hair; mesothorax polished, shining, with 
scattered punctures, only hairy at front and sides, and narrowly 
on hind margin; scutellum with similar sculpture and hairy border, 
but more closely punctured, and some short black hairs bordering 
