Pomona College, Claremont, California 45 
Halictoides miilleri Ckll. 
Both sexes were taken by Baker at Claremont. 
Hesperapis nitidulus sp. n. 
é Length a little over 6 mm.; shining black, with white hair; 
eyes pea-green; mandibles broad, red and notched at end; head 
large and broad; flagellum very obscurely reddish beneath; tegule 
piceous in front, testaceous posteriorly; wings hyaline, nervures and 
stigma dusky ferruginous; abdomen with rather thin hair-bands. 
near to H. Jarree Ckll., but mesothorax with very minute regular 
punctures; area of metathorax dull and abdomen more shining. 
Easily known from H. olivie Ckll. by the clearer wings and dark 
antenne. 
Habitat: Claremont, California (Baker; Pomona coll. 229). 
Agapostemon californicus Crawford. 
Claremont (Baker). A male with the scape all dark; it usually 
has a yellow stripe in this species. 4. radiatus Say was also taken 
by Baker at Claremont. 
Panurginus atriceps (Cresson) 
Mountains near Claremont (Baker; Pomona coll. 204). 
Andrena osmioides sp. n. 
é Length about 10 mm., robust, very hairy, looking like an 
Osmia; head, thorax and legs black, abdomen olive-green, the sur- 
face minutely granular, not polished or punctate; hair of head and 
thorax white, dullish and faintly creamy above, very long and 
abundant, forming an immense white beard over mouth; abdomen 
with erect or sub-erect pale hair, all over the surface but not dense, 
long on the first two segments, apex with pale soot-colored hair; 
legs with pale hair. Head extremely broad, facial quadrangle very 
much broader than long; malar space very short; cheeks very broad, 
obtusely angled behind below level of middle of eye; antenne ordi- 
nary, third joint equal in length to next two combined; flagellum 
very obscurely reddish beneath; vertex dull, only shining on orbital 
margin; mesothorax dull, not punctate, but scutellum anteriorly 
shining; area of metathorax dull and granular, with long erect hairs 
like the adjacent parts; tegule piceous; wings dusky on apical mar- 
