no. 2064. BEES OF GENUS ANDRENA—VIERECK AND COCEERELL. 55 



median. Second submarginal cell receiving first recurrent nervure 

 far beyond middle. Middle and hind tarsi dark reddish. Abdomen 

 shining, not punctured; second segment depressed in middle about 

 two-fifths; second and following segments with thick pale hair bands, 

 that on second rather broadly and on third very narrowly interrupted 

 in middle. Hair at apex of same color. 



Type.— Cat. No. 18163, U.S.N.M. 



b 80 . Clypeus without a distinct median ridge. 



a 81 . Clypeus dullish; third submarginal cell on upper side not as long as second 

 transverse cubital. 



ANDRENA BRACHYCARPAE, new species. 



Florissant, Colorado. June 1, 1907. (S. A. Kohwer.) At flowers 

 of Salix br achy car pa. 



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

 Facial quadrangle broader than long. Process of labrum narrowly 

 truncate, but the truncation depressed in middle, so as to give a 

 slight appearance of emargination. Clypeus shining, rather sparsely 

 punctured. Facial foveae seen from above light reddish, quite 

 narrow, ending below at level of antennae. Antennae dark, third 

 joint not as long as next three combined, but a little longer than 

 next two. Mesothorax dull and granular; scutellum more shining. 

 Area of metathorax minutely wrinkled, not denned. Tegulae piceous. 

 Wings reddish hyaline. Stigma and nervures ferruginous. Basal 

 nervure meeting transverse median. Second submarginal cell 

 receiving first recurrent nervure well beyond middle. Hair of hind 

 tibiae pale ocherous, reddish sooty at base; on inner side of hind tarsi 

 light golden. Abdomen shining, without distinct punctures; hind 

 margins of segments brownish; segments 2 to 4 with rather thin 

 hair bands, and the surfaces of segments 3 to 6 thinly hairy all over. 

 Hair at apex light reddish. 



In the key this falls in a group, which also includes A. decussata 

 A. perezana, A. astragali, A. davidsoni, and A. per sonata. It is dis- 

 tinguished from all these by the following combination of characters: 

 Scopa appressed and hiding tegument; inclosure of metathorax 

 rugose; abdominal fasciae indistinct, but nevertheless more or less 

 developed. 



o 81 . Clypeus shining; third submarginal cell on upper side as long (or almost) as 

 second transverse cubital nervure ; middle and hind tarsi red. 

 (See A. medionitens variety a, above.) 



6 78 . Facial foveae white or whitish. 



a 82 . Small species, 8 mm. long or less; first recurrent nervure joining second sub- 

 marginal cell at middle or not much beyond. 



a 83 . Facial foveae a little broader; abdomen seems faintly metallic. 

 (See A. coloradina, described above.) 



6 83 . Facial foveae a little narrower. 



