Pomona College, Claremont, California 55 
black; abdomen with sublateral dark spots; apical plate minutely 
notched. 
Nomada pyrrha sp. n. 
@ Length about 8 mm.; bright ferruginous red, without yel- 
low markings, and practically without dark ones; mandibles simple; 
head very broad; third antennal joint a little longer than fourth; 
black between ocelli; mesothorax densely roughened, with three 
faintly indicated bands of darker red; post scutellum not yellow; 
metathorax with a dusky shade in middle below the enclosure; face, 
scape and front with scattered long fuscous hairs; thorax above 
practically hairless; sides of metathorax with a patch of white 
hair; a black patch near bases of middle and hind legs; tegule 
bright red, punctured; wings dilute brown, darker at apex; stigma 
ferruginous, nervures fuscous; b. n. going a considerable distance 
basad of t. m.; third s. m. much narrowed above; hind tibiz rough- 
ened on outer side, but not distinctly tuberculate; abdomen dullish, 
minutely granular; sides apically with fuscous hair; fifth segment 
with a narrow band of shining white tomentum. 
Habitat: Claremont, California (Baker; Pomona coll. 169). 
Closely resembles N. californie Ckll., but is evidently an entirely 
red Xanthidium, to be associated with NV. miniata Sm., which how- 
ever, has the third antennal joint much shorter than the fourth, 
and orange spots on the abdomen. 
Nomada melanosoma sp. n. 
é Length a little over 5 mm.; black, the body almost without 
light markings; hind margins of abdominal segments (fully half 
of second and third) obscurely brown; extreme sides of segments 
2 to 5 with very oblique broad white stripes; mandibles simple, 
white at base; lower edge of clypeus very narrowly reddish, with 
a white mark on each side; malar space white; head broad; face 
covered with silvery-white hair; antenne long, the flagellum thick, 
the joints swollen, obscure dark reddish beneath; third antennal 
joint about half length of fourth; vertex, cheeks and thorax (espe- 
cially pleura and metathorax) with white hair; mesothorax dull, 
extremely densely rugoso-punctate; anterior legs in front, middle 
tarsi and apical part of femora in front, and apex of hind femora 
