52 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



nervure falling short of transverse median. Second submarginal cell 

 broad, receiving first recurrent nervure almost at its end. Hair on 

 hind tibiae pale ocherous or almost cream colored, shining. Abdomen 

 finely granular, without evident punctures, the thin loose hair hardly 

 forming distinct bands; second segment in middle depressed more 

 than two-thirds but less than one-half; hair at apex fight reddish 

 ochreous. 



Type. — Collection of the American Entomological Society. 

 b 76 . Smaller ; hair of hind tibiae longitudinally bicolored, sooty brown and pale fulvous. 



ANDRENA SALICICOLA, new species. 



Halfway House, Pikes Peak, Colorado. On Salix. May 30, 1904. 

 (Cockerell.) 



Female. — Length nearly 9 mm. Black. Pubescence long, pale fer- 

 ruginous, very bright on thorax above. Facial quadrangle broader 

 than long. Process of labrum emarginate. Clypeus shining, sparsely 

 punctured. Facial f o veae seen from above very dark brown, occupying 

 two-thirds space between eye and antenna, below they end a little below 

 level of antennae. Flagellum dark reddish beneath. Third antennal 

 joint about as long as next two combined. Mesothorax and scutellum 

 dull, without evident punctures, the median and parapsidal lines on 

 mesothorax shining. Area of metathorax scarcely defined, obscurely 

 wrinkled at base. Tegulae dark brown. Wings hyaline, slightly 

 dusky at apex. Stigma and nervures reddish sepia. Basal nervure 

 falling a little short of transverse median. Second submarginal cell 

 receiving first recurrent nervure almost at apex. Third submarginal 

 very long. Hind tarsi reddish. Hair on hind tibiae pale reddish 

 anteriorly and pale sooty posteriorly, the colors abruptly contrasting. 

 Abdomen shining, not punctured, with thin long hair but no bands. 

 Hair at apex pale but slightly sooty. Second segment in middle 

 depressed nearly one-half. 



Very closely allied to A. paenefulva. 



In the key, A. salicicola falls near A. asmi, and is separated thus: 



Foveae black; pleurae with pale pubescence asmi. 



Foveae dark brown; scopa partly brown and compact salicicola. 



Type.— Cat. No. 18161, U.S.N.M. 



6 73 . With distinct light hair bands on abdomen. 



a 76 . Wings strongly red-brown; first recurrent nervure joins second submarginal cell 

 about middle ; facial foveae light reddish, very narrow. 



ANDRENA DAVIDSONI, new species. 



Mount Wilson, Southern California. (Davidson.) 



Female. — Length, 9 mm. Black, with pale ocherous pubescence. 

 Facial quadrangle broader than long. Process of labrum truncate, 

 the truncation slightly concave. Clypeus finely granular, with 

 numerous shallow punctures. Facial foveae seen from above very 



