98 PROCEEDINGS OF THE ACADEMY OF [1896, 



yellowish, except the usual black dots, and a pair of obscure suf- 

 fused brownish spots adjacent to hind margin. Supraclypeal mark 

 wanting. Dog-ear marks present. Lateral face-marks white, 

 broad, subquadrate, the lower border occupied by a black line, the 

 upper border passing somewhat obliquely from the point on orbital 

 margin opposite the antennal sockets, to slightly below the upper 

 end of the dog-ear marks. 



Thorax smooth and shining, mesothorax sparsely punctured ; 

 hairs on thorax above sparse, brownish, those on pleura white. No 

 light markings except that the tubercles are pale 

 yellow with a dark spot, and the collar shows a lit- 

 tle yellow. 



Tegulfe pale testaceous ; wings hyaline, nervures 

 Fig. 15. jaractically colorless, stigma very pale yellowish. 



Marginal cell rather long and narrow, its poststigmatal and substig- 

 matal portions about equal. Second submarginal subtriangular, 

 narrowed more than half to marginal. Third discoidal very weak. 

 Legs black with the knees and tarsi testaceous ; anterior and 

 middle tibiae testaceous in front. Abdomen above shining dark 

 brown, the hind margins of the segments a little pale; no light 

 marks. Venter light brown. 



Hab. — Albuquerque, N. M., June 30, 1895, one specimen on a 

 yellow-flowered species of Corapositpe not identified. (Ckll., 3,253.) 



62. Perdita laticeps n. sp. 



S . — 5i mm. long. This greatly resembles cfrassiceps, in fact I had 

 regarded them as the same until a close examination was made when 

 writing the description of the latter. P. laticeps diflTers from crassi- 

 ceps as follows : 



The head is a little larger, the face is much more hairy, the sides 

 of the cheeks are covered with short hairs (whereas in crassiceps 

 they are bare and shining), the clypeus is distinctly panama-hat- 

 shaped, the supraclypeal mark is represented by a narrow trans- 

 verse line, adjacent to the upper border of the clypeus, the dog-ear 

 marks are absent, the antennae are dark brown above and below, 

 the mandibles are stouter, the anterior and middle tibiae are not 

 testaceous in front, the hind tibipe are more hairy, the abdomen is 

 considerably shorter and broader, with the hind margins of the seg- 

 ments broadly hyaline. The tip of the abdomen is narrowly but 

 abruptly truncate. There is no transverse ridge behind the ocelli,^ 

 but this area shows strong punctures, which are wanting in crassi- 

 ceps. The wings are as in crassiceps. 



