50 Journal of Entomology and Zoology 
long fuscous hair at sides of front and on scape; cheeks with long 
white hair; mesothorax and scutellum with thin long erect white 
hair; abdomen quite without bands, hair at apex dark grayish- 
fuscous. 
Habitat: Claremont, California (Baker; Pomona coll. 203, 
229). <A distinct species, readily known from D. puthua CkIl. 
(male) by the dark hair at apex of abdomen. The dull surface 
of the abdomen at once separates it from the two following species. 
Diandrena clariventris sp. n. 
8 Length a little over 6 mm., robust, with broad-pyriform 
abdomen; head and thorax dull blue-green; legs black, the femora 
perhaps faintly metallic; abdomen polished, shining, very dark blue- 
green, the hind margins of the segments broadly subtranslucent 
brown; head very broad, facial quadrangle much broader than 
long; antenne only moderately long, flagellum dark reddish; face 
and front with pure white hair, hair of thorax also white, no dark 
hair on head or thorax; area of metathorax granular, faintly plica- 
tulate basally, and with a faint median raised line; tegule piceous; 
wings dusky; stigma and nervures reddish-fuscous, the stigma dark, 
not very large; hair at apex of abdomen very pale, with an ochreous 
tint. 
Habitat: Claremont, California (Baker; Pomona coll. 212). 
Allied only to the next species, which is much smaller. D. cha- 
lybea (Cress.), also taken by Baker at Claremont, has the abdomen 
shining blue. 
Diandrena scintilla sp. n. 
? Length about or hardly 5 mm., robust, with very broad ab- 
domen. General characters as in D. clariventris, but much smaller; 
head nearly circular, seen from in front; flagellum very short and 
stout, the middle joints about twice as broad as long, dark reddish 
beneath; front shining, punctate; mesothorax and scutellum olive- 
green, shining, with distinct minute punctures; area of metathorax 
concave, finely striatulate; stigma and nervures paler than in D. 
clariventris, and wings not so gray; punctures on second abdominal 
segment sparse; hair at apex of abdomen light ferruginous. 
