58 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 48. 



ANDRENA TRAPEZOIDINA, new species. 



War Bonnet, Sioux County, Nebraska. May 27, 1901. (M. A. 

 Carriker.) 



Female. — Length, 9J mm. Black, with grayish white hair, very 

 faintly yellowish on thorax above. Facial quadrangle much broader 

 than long. Process of labrum rounded at end, the sides strongly 

 concave. Clypeus minutely granular, with small not dense punctures. 

 Facial foveae seen from above white, quite broad, ending below at 

 about level of top of clypeus. Flagellum except at base rather bright 

 red beneath. Third antennal joint shorter than next three combined. 

 Mesothorax dull, not distinctly punctured, somewhat shining pos- 

 teriorly. Scutellum shining. Area of metathorax coarsely rough- 

 ened, scarcely denned, nearly all the metathorax covered with hair. 

 Tegulae reddish. Wings reddish, stigma and nervures ferruginous. 

 Basal nervure meeting transverse median. Second submarginal cell 

 receiving first recurrent nervure near its end. Hair of hind tibiae 

 shining white; hair on inner side of hind tarsi creamy white. Abdo- 

 men shining, not punctured, narrow hind margins of segments tes- 

 taceous. Second segment in middle depressed about one-third. 

 Segments 2 to 4 with white hair bands, that on 2 interrupted in 

 middle. Hair at apex pale grayish brown. Rather like A. cam- 

 panulae from same locality, but easily distinguished by the broad face, 

 color of nervures, etc. 



[This appears to be a race or subspecies of A. sapellonis Cockerell, 

 from which it differs by the clearer, reddish hair at apex of abdomen, 

 and absence of a smooth keel in middle of clypeus. Superficially,, it 

 is just like a specimen of A. nudiscopa Viereck (det. Viereck) from 

 Fort Collins, Colorado, June 12, 1900 (Gillette); but the abdomen is 

 brilliantly shining in irapezoidina, perfectly dull in nudiscopa.] 



Type. — Entomological collection of the University of Nebraska. 



