730 PROCEEDINGS OF THE ACADEMY OF [NoV., 



Colletes californicus Prov. 



Two d^c?, La Jolla, August. 



Provancher's description is very brief, but this is doubtless the 

 species he had before him ; a fuller description is submitted. 



d^. — Length 8 mm. All of face below antennae hidden by a 

 long white pubescence. Above the antennae the face is closely 

 punctured, opaque, the pubescence sparser, yellowish. Cheeks 

 with whitish pubescence, space between eyes and base of mandibles 

 a little less than width of the latter at base, labrum polished, 

 divided into five ridges, the one in the middle broadest, with a dent 

 near its base. First joint of flagellum apparently a little shorter 

 than the second. Dorsulum closely punctured, opaque, shiny in front, 

 the punctures a little larger than those on top of head. Pubescence 

 on dorsum of thorax the same color as that on top of the head. 

 Mesopleurse as closely punctured as possible without being confluent, 

 punctures about the same size as those on dorsulum, pubescence 

 white like on the cheeks. Disk of metathorax divided into about 

 eight deep, shining, squarti pits, by narrow longitudinal ridges. En- 

 closed space on posterior face of metathorax not exactly smooth nor 

 highly polished, triangular in shape and wider at base than long. 

 The adjoining areas indistinctly sculptured, subopaque. Legs 

 covered with loose white hairs. Wings perfectly clear, the ner- 

 vures and stigma dark brown. First recurrent nervure received in 

 about the middle of the second submarginal cell, the same cell 

 about three-fourths as long on the radius as on the cubitus. Trans- 

 verse median nervure interstitial, curved out. Abdomen subopaque, 

 closely finely punctured. The first segment with loose hairs, those 

 on remaining segments sparser. All the segments, except the 

 apical, with an apical distinct fascia of appressed pubescence. On 

 top of the abdomen the pubescence is pale yellowish, to the sides 

 whitish. The apical segment is covered with a fine appressed, 

 whitish pubescence. 



Black; spurs white, claws dark brown. 



The other specimen has the pubescence above, whiter, and the 

 dent on the middle ridge of labrum continued into a longitudinal 

 fovea; otherwise identical. 



Ceratina dupla Say. 



One 9, 5 mm. in length. Alpine Tavern, Mt. Lowe, August 12. 



