no. 2064. BEES OF GENUS ANDRENA— VIERECK AND OOGKERELL. 9 



fine but well marked longitudinal ridges. Tegulae dark reddish. 

 Wings dusky hyaline, nervures and stigma dark ferruginous. Basal 

 nervure meeting transverse median. Second submarginai receiving 

 first recurrent nervure just beyond middle. Abdomen shining, with 

 small but very distinct punctures. Hind margins of third to fifth 

 segments with hair bands and the same at sides of second. Second 

 segment in middle depressed about two-fifths. Hair at apex very 

 pale yellowish. Apical plate truncate. 



ANDRENA TACITULA, variety. 



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

 Male. — Length, 8 mm. Black. Pubescence vary pale ochreous. 

 Head very broad. Mandibles red at end. Clypeus shining, strongly 

 and closely punctured. Antennae dark, third joint a little longer 

 than fourth. Cheeks normal. Vertex strongly punctured. Meso- 

 thorax and scutellum shining, with strong and only moderately 

 large punctures, well separated on middle of mesothorax, irregularly 

 confluent on scutellum. Area of metathorax with numerous strong 

 ridges. Tegulae rufopiceous. Wings reddish hyaline. . Basal nervure 

 almost reaching transverse median. Second submarginai cell broad, 

 receiving first recurrent nervure well beyond middle. Small joints 

 of tarsi ferruginous. Abdomen finely punctured, with short thin 

 hair and distinct bands at sides of segments. Second segment in 

 middle depressed nearly one-half. Apical plate truncate. 



(This was given as a distinct species, but I believe it to be conspe- 

 cific with A. tacitula.) 



ANDRENA TACITULA GROSSULARIAE, new variety. 



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



Male. — Length, 8 mm. Black. Tarsi ferruginous apically, man- 

 dibles dark chestnut red at apex. Pubescence throughout warm 

 reddish ochreous, long and bright on scutellum. Head ordinary, 

 facial quadrangle broader than long, process of labrum shallowly 

 emarginate. Clypeus rugosopunctate; vertex dull and granular; 

 cheeks rather broad; antennae black, flagellum obscurely brownish 

 beneath; third antennal joint about as long as fourth; fifth only a 

 trifle longer; mesothorax closely punctured, but shining on disk be- 

 tween the puctures; metathorax dull and roughened, except the 

 rather large triangular basal area, which is well defined, moderately 

 shining, and covered with weak irregular longitudinal wrinkles. 



Wing hyaline, faintly dusky apically, nervures and stigma rather 

 dusky ferruginous. Basal nervure meeting transverse median, 

 whereas in A. jockorum it goes basal of it. First recurrent nervure 

 joining second submarginai about the middle. Third submarginai 

 not so long as in A. jockorum. 



