16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



of the segments reddish. Legs dark red brown, small joints of the 

 tarsi ferruginous. Pubescence black except on occiput, mesothorax, 

 scutellum, post scutellum, and tubercles, where it is reddish ochreous, 

 and on inner side of tarsi, where it is dark reddish. Facial quadran- 

 gle much broader than long. Process of labrum large, dark reddish, 

 broadly rounded, with a small median truncation. Clypeus black, 

 shining, with small sparse punctures, no median line or ridge. Facial 

 foveae seen from above red brown, occupying hardly half the distance 

 between eye and antenna, below not going below antennae. Flagel- 

 lum dull reddish beneath. Third antennal joint longer than next 

 two together but not so long as next three. Mesothorax and scutel- 

 lum dull and granular; area of metathorax granular; sides of meta- 

 thorax with long black hair. Tegulae reddish. Wings strongly 

 reddish; nervures and stigma dark ferruginous. Basal nervure 

 meeting transverse median. Second submarginal cell broad, receiv- 

 ing first recurrent nervure much before middle. Hair of hind tibiae 

 sooty, appearing pallid in some lights. Abdomen shining, without 

 distinct punctures. Hair at apex reddish sooty. Second segment 

 in middle depressed about one- third. 



In the key this falls in a special group, along with another, still 

 undescribed, species. The group is characterised especially by its 

 attenuated palpi. 



6 16 . Female about 10 mm. long; hair of head (except occiput) black; of thorax above 

 red; abdomen purple; no hair bands. 



ANDRENA PURPURINA, new species. 



Colorado. 



Female. — Length, 11 mm. Dark purplish blue, the clypeus and 

 face black, thorax very dark obscure blue; abdomen quite brilliantly 

 colored a sort of pearly blue when well lighted, but the hind margins 

 of the segments becoming reddish. Legs and underside of abdomen 

 very dark chestnut red. Facial quadrangle broader than long. 

 Eyes small. Process of labrum rather narrowly truncate. Clypeus 

 very prominent, convex, shining, rather strongly punctured, without 

 any smooth line or ridge. Facial foveae seen from above reddish 

 chocolate, occup} r ing little more than half space between eye and 

 antenna, little narrowed below where they end at about level of 

 antennae. Front striate. Flagellum reddish, beneath pruinose. 

 Third antennal joint nearly as long as next three together. Hair of 

 head black, hair of thorax bright fulvous on mesothorax and scutella, 

 otherwise black. Mesothorax and scutellum dull, finely roughened. 

 Area of metathorax granular. Tegulae rufotestaceous. Wings 

 brownish hyaline, stigma and nervures dull ferruginous. Basal 

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

 ginal cell rather narrow, receiving first recurrent nervure about 



