no. 2064. BEES OF GENUS ANDRENA—VIERECK AND COCKERELL. 27 



following three together. Mesothorax dull, almost entirely concealed 

 by hair. Area of metathorax small, irregularly, transversely, wrin- 

 kled, the margins smooth but not shining. Tegulae piceous. Wings 

 strongly brownish, the broad apical margins darker. Stigma slender 

 and small, blackish, but a bright red spot at its base; nervures dusky 

 ferruginous, some lighter than others. Basal nervure meeting trans- 

 verse median. Second submarginal cell very broad, its lower inner 

 corner produced, the first recurrent nervure joining it before the 

 middle. Abdomen broad and flattish, not punctured; first segment 

 with hind margin red; sides of segments with short reddish hair 

 forming interrupted band on third and complete one on fourth; hair 

 at apex dense, reddish brown. 



Distinguished from A. pecosana by the darker pubescence and 

 much larger size. 



Type.— Cat. No. 18139, U.S.N.M. 



o 26 . Less than 15 mm. long. 

 a 29 . Males. 



a 30 . Abdomen dull, with dense entire hair bands ; legs red ; clypeus and lateral face 

 marks yellow. 



ANDRENA COLLETOIDES, new species. 



Colorado. (Snow, 1030.) 



Male. — Length, 10 mm. Black; legs ferruginous, blackish at base; 

 clypeus except lower edge, and small lateral face marks receding from 

 eye and following sides of eye, yellow. Pubescence grayish white, 

 very abundant on head and thorax and first abdominal segment, 

 remaining abdominal segments thinly covered with pubescence, and 

 all with thick, shaggy apical hair bands. 



Head ordinary; facial quadrangle about square, somewhat broad- 

 ened above. Process of labrum emarginate. Clypeus shining, with 

 distinct scattered punctures. Vertex moderately shining. Cheeks 

 normal, very hairy. Flagellum red, brighter beneath, blackened at 

 base. Third antennal joint nearly twice as long as fourth and longer 

 than fifth. Mesothorax dullish, very feebly punctured; the small 

 long-triangular area of metathorax dull and granular, only defined 

 by absence of hair; tegulae warm reddish testaceous. Wings clear 

 hyaline, the small narrow stigma and the nervures testaceous. Basal 

 nervure falling a trifle short of transverse median. Second submar- 

 ginal cell very large, receiving first recurrent nervure beyond middle. 

 Abdomen dull, not evidently punctured. Apical plate narrow, 

 emarginate. 



In the key this is separated from A. vernoni by the whitish pubes- 

 cence. 



