no. 2064. BEES OF GENUS ANDRENA— VIERECE AND GOCKERELL. 29 



at middle. Spurs white. Abdomen shining, without evident punc- 

 tures. Hind margins of second and following segments with thin but 

 entire white hair bands. Apical plate truncate. 



Type.— Cat No. 18141, U.S.N.M. 



The cheeks and top of head are quite different from those of 

 A. occidentalis. 



In the key this falls in a couplet with canadensis, and is distin- 

 guished by the "hind metatarsi yellowish stramineous." 



6 33 . Flagellum dark. 



a 34 . Head very large, with broad shining cheeks, which have a sharp rim behind; 

 legs reddish brown. 



ANDRENA NAVAJORUM, new species. 



Albuquerque, New Mexico. (Oslar.) 



Male. — Length, 8 mm. 



Very close to A. occidentalis variety A, but smaller. Clypeus with- 

 out well defined median depression. Cheeks not angled behind 

 but with same sharp raised border. The tarsi and hind tibiae rather 

 light brown. 



Type.— Cut. No. 18142, U.S.N.M. 



6 34 . Head ordinary. 



ANDRENA AGRICOLARUM, new species. 



Fort Collins, Colorado. May 12, 1903. (Colorado Agricultural 

 College.) 



Male. — Length, nearly 8 mm. Black, with dull white hair, pale 

 ocherous on thorax above. Head broad, but otherwise ordinary. 

 Facial quadrangle considerably broader than long. Mandibles short. 

 Process of labrum small and narrow. Clypeus shining, rather sparsely 

 punctured. Vertex dull and depressed on each side of ocelli, but a 

 shining ridge between vertex and cheeks. Antennae slender, flagel- 

 lum dark reddish beneath. Third antennal joint little longer than 

 fourth, but not nearly as long as fourth and fifth combined. Meso- 

 thorax slightly shining, feebly punctured. Area of metathorax 

 dull and granular. Tegulae rufopiceous. Wings hyaline, faintly 

 reddish, slightly dusky at apex. Stigma and nervures clear amber 

 color, the outer nervures more or less fuscous. Basal nervure meeting 

 transverse median. Second submarginal cell narrow, receiving first 

 recurrent nervure a little beyond middle. All the tarsi clear ferru- 

 ginous. Abdomen black, not at all metallic, not evidently punctured, 

 the segments dark reddish apically ; third and following segments and 

 second at sides with white hair bands; second segment in middle 

 depressed hardly a third. Apical plate very small and narrow, 

 truncate, surrounded by hair, but without long fringe extending 

 beyond. 



