Genus Andrena Jbmid in New Mexico. 83 



the pubescence on the face and the colour of the legs, as well 

 as in tiie pale clypeus. 



A. pi'unorum, Jessicce, and Casadce all show a blunt curved 

 tooth at end of hind coxa. 



(jb) Pubescence of pleura, face, and cheeks dull white ; second 

 segment of abdomen with a black band. 



Andrena Casadce, Ckll., sp. n. 



(J. Length about 10 millim. Head and thorax black; 

 clypeus pale primrose-yellow, witli two black spots ; abdomen 

 red and black ; pubescence dull whitish, ochraceous on front, 

 occiput, and dorsum of thorax ; build more slender than in 

 prunorum. 



This is in all respects closely similar to prunorum^ but 

 differs in being smaller, the antennaj perhaps relatively some- 

 what longer, the base of the antennas not ferruginous, the 

 pubescence of the face relatively longer, the pubescence of the 

 face, cheeks, pleura, and metathorax greyish white instead of 

 fulvous, the basal process of the labrum not emarginate, the 

 tegulte dark brown, the mesothorax duller, the middle femora 

 not so broad, the punctuation of the abdomen finer, the 

 second abdominal segment black at base. 



The flagellum is black, not fulvous beneath as in modesta. 

 The scape shows only the slightest rufous stain in front. 

 The mandibles are wholly black, bituberculate at base. The 

 second segment of the abdomen is not entirely ferruginous as 

 in fastuo^a^ which must, however, be closely similar. 



'llah. College Farm, lilesilla Valley, N. M., April 9, 1895, 

 on plum (/. E. Casad, 164). 



2. Species ivith the abdomen black or dark brown. 



a. Pubescence black. 



Andrena nigerrima, Casad, sp. n. 



$ . " Entirely deep shiny black, with black pubescence ; 

 head about as wide as thorax and but sparsely pubescent ; 

 clypeus large, punctured, shiny, but very slightly hairy; 

 pubescence heaviest on sides of face and around insertion of 

 antennae ; a longitudinal raised line between antennas ; 

 flagellum becoming slightly brownish beneath and toward 

 tip ; face between ocelli and antennae striated ; occiput and 

 cheeks punctured ; mesothorax sparsely hairy, closely punc- 

 tured ; scutellum and pleura with dense tufts of long pubes- 

 cence; metathorax comparatively bare, with fringed margins; 



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