Pomona College, Claremont, California 45 



Halictoides miiUeri Ckll. 

 Both sexes were taken by Baker at Claremont, 



Hespcrapis nitididus sp. n. 

 $ 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; Hagellum very obscurely reddish beneath; tegulae 

 piceous in front, testaceous posteriorly; wings hyaline, nervures and 

 stigma dusky ferruginous; abdomen with rather thin hair-bands, 

 near to H. larrea Ckll., but mesothorax with very minute regular 

 punctures; area of metathorax dull and abdomen more shining. 

 Easily known from H. oliv'ia Ckll. by the clearer wings and dark 

 antennae. 



Habitat: Claremont, California {Baker; Pomona coll. 229), 



Agapostemon californiciis Crawford. 

 Claremont (Baker). A male with the scape all dark; it usually 

 has a yellow stripe in this species. J. radiatus Say was also taken 

 by Baker at Claremont. 



Pairiirgiiiiis a triceps (Cresson) 

 Mountains near Claremont (Baker; Pomona coll. 204). 



Andrena osmioides sp. n. 

 $ 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; antenncE 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; tegulae piceous; wings dusky on apical mar- 



