ROCKY MOUNTAIN BEES 1 95 



Flagellum dark, sometimes obscure reddish. 



3 



3 Abdomen beyond the second segment covered with ochreous tomen- 

 tum, not at all banded (New Mexico). 



Xenoglossodes imitatrix Ckll. and Porter 

 Abdomen beyond the second segment banded. 



4 



4 Larger and more robust, breadth of thorax about 5 mm.; thorax 

 covered above with fulvous hair; hind basitarsus thinly haired, but 

 the hairs long. Xenoglossa pruinosa Say 

 Smaller and narrower, breadth of thorax 4 mm. or less; hair of 

 thorax above not brilliantly colored; hind basitarsus more densely 

 hairy. 5 



5 Middle third of fifth abdominal segment with the hair dark chocolate 

 brown (New Mexico). Xenoglossodes lippiae Ckll. 

 Middle of fifth abdominal segment with the hair wholly pale (Raton, 

 New Mexico). Xenoglossodes neotomae Ckll. 



