no. 2084. BEES OF GENUS ANDRENA—VIERECK AND COCKERELL. 37 



marginal cell receiving first recurrent nervure not far from its end. 

 Spurs dark. Hair on inner side of hind tarsi chocolate. Abdomen 

 shining, without distinct punctures; hind margins of segments 

 obscurely brownish; second segment in middle depressed about one- 

 third; first segment with long white hair, the others with little hair 

 and no bands. Apical plate small and narrow. 



Type.— Cat. No. 18148, U.S.N.M. 



In the key this falls near A. moesticolor. 



o 43 . Smaller, more ordinary species. 



a 45 . First recurrent nervure joins second submarginal cell far beyond middle ; hair of 



thorax pale ochreous or fulvous. 

 a 46 . Head extremely broad. 



ANDRENA LAMINIBUCCA, new species. 



Topaz Butte, Colorado. June 17. (S. A. Rohwer.) 

 Male. — Length, 10 J mm. Black, small joints of tarsi reddish. 

 Pubescence pale fulvous, bright on scutellum. Head very broad, 

 malar space rather large. Process of labrum strongly emarginate. 

 Mandibles with a projecting angle at base beneath. Clypeus shining, 

 indistinctly punctured, with a flattened median ridge. Antennae 

 very long; third joint only a little longer than fourth. Flagellum 

 dark reddish beneath. Cheeks very broad, flattened, angled behind 

 at about level of middle of eye. Thorax with long hair. Mesotho- 

 rax, scutellum and area of metathorax dull and granular. Tegulae 

 dark reddish. Wings reddish hyaline, nervures and stigma ferrugi- 

 nous. Basal nervure falling just short of transverse median. Second 

 submarginal cell receiving first recurrent nervure near its end. Third 

 submarginal very broad above. Abdomen shining, without evident 

 punctures; hind margins of segments dark reddish, no distinct hair 

 bands. Apical plate rounded. 



Easily known from A. tacitula grossulariae, another red-haired 

 species found at Topaz Butte, by the smooth, impunctate abdomen. 



o 46 . Head ordinary. (See A. profundiformis in Trachandrena, above.) 



ft 45 . First recurrent nervure joins second submarginal at or not far beyond middle. 



a 47 . Pubescence ferruginous. 



(See A. tactitula grossulariae in Trachandrena, above.) 

 6 47 . Pubescence not ferruginous. 

 a 48 . Head very broad. 

 a 49 . Eyes diverging below; cheeks shining, broad, with a rim behind. 



(See A. navajorum, above.) 

 o 49 . Eyes not diverging below. 



ANDRENA, species. 



Sioux County, Nebraska. May. (L. Bruncr.) 



Male. — Length, 7 mm.; pubescence clear white; wings clear hya- 

 line; basal nervure going far basal of transverse median; second 

 submarginal receiving first recurrent nervure in middle. 



