16 PROCEEDINGS OP THE ACADEMY OF [1895. 



Legs black. Wings hyaline with a milky tint, iridescent. Vena- 

 tion pale brown. 



Recognized among the species with partly white face, by its denser 

 hairs on head and thorax, white bands on abdomen, and black legs. 



Hab.— San Augustine, N. M., August 29th. (Ckll., 2,270.) 

 Another example, from the same locality and taken on the same 

 day (Ckll., 2,277, a $ ), differs a little, having the dark marks on 

 clypeus reduced, mesothorax above very dark, slightly greenish, not 

 blue (metathorax and pleura blue), band of 2d segment of abdomen 

 constricted, not interrupted medially. 



Mr. Fox writes: " albovittata also very distinct by dark legs, im- 

 maculate pronotum and long marginal cell." 



Perdita nitidella n. sp. tf- 



About 4 mm. long; head and thorax greenish-blue. Face (in- 

 cluding clypeus) up to level of insertion of antennae bright yellow, 

 furthermore, the yellow extends as much beyond the insertion of the 

 antennae as the length of the scape, but is divided by two incursions 

 of the dark blue, which descend to the bases of the antennae, their 

 sides forming right angles thereat. Antennae yellow, funicle, flagel- 

 lum, and tip of scape more or less dark brown above. 



Head and thorax finely rugulose. Borders of prothorax, and 

 tegulae, yellow. Abdomen shiny, yellow, becoming darker towards 

 the tip, with dark brown bands. These bands are one at base of 

 1st segment and one at its distal border, these two connected by a 

 longitudinal median line; a broad one at distal border of 2d seg- 

 ment, bulging (especially posteriorly) in the middle; a linear one at 

 proximal border and a broad one at distal border of 3d segment, 

 and rather broad ones about the distal borders of 4th, 5th, and 6th 

 segments. 



Legs primrose-yellow, hind tibiae and tarsi brownish. 



Wings hyaline, iridescent, veins dark brown, 3d discoidal exces- 

 sively indistinct. 



Recognized among the species with partly yellow face, by the yel- 

 low extending over the whole of that portion of the face beneath the 

 level of the antennae, but not to the middle ocellus; by the yellow 

 legs ; and by the small size and shiny abdomen with yellow and 

 brown bands. 



Hab — Las Cruces, N. M., on the campus of the Agricultural 



