1896.] NATURAL SCIENCES OF PHILADELPHIA. 53 



of each sex. I know of no other specimens, and nothing is known 

 of the exact locality or habits. The dark chocolate-brown head and 

 black thorax at once separate this species from P. latior. In both 

 species the marginal cell is obliquely truncate. 



2. Perdita latior n. sp. Fig. 6, (part of wing). 



S 9 , length 52-6 mm., broad, head large, broader than long ; 

 head, thorax, legs and tip of abdomen with pubescence consisting of 

 dull white erect hairs : punctuation of vertex, mesothorax and 

 scutellum very fine and close; upper surface of nieta- 

 thorax bare, shining, minutely granular; dorsum of 

 abdomen very minutely punctured, the punctures on 



Fig, 6. first segment very sparse. Tegulse pale testaceous ; 

 ■wings hyaline, nervures pale brown, stigma little developed, 3d 

 discoidal present, marginal about as long as 1st submarginal, 2d sub- 

 marginal narrowed more than half to marginal. 



$ . — Clypeus prominent, with a minute tooth on each side. Head 

 and thorax dark green, metathorax strongly tinged bluish. Mandi- 

 bles except their dark tips, clypeus, lower corner of face, and a broad 

 transverse band between antennae, dull testaceous. The punctua- 

 tion, which is close before the ocelli, becomes sparse behind them. 

 Antennae dull testaceous, more or less suffused with blackish. Legs 

 dark piceous, the front of the anterior tibiae and all the tibial spurs, 

 dull testaceous. Abdomen shining, ferruginous ; first segment more 

 or less suflTused with blackish. 



9 . — Head and thorax dark green, face almost black, dorsum of 

 mesothorax and scutellum purplish, dorsum of metathorax bluish. 



Antennae dark brown, the last 7 joints of flagellum beneath be- 

 coming dull testaceous or ferruginous. Mandibles yellowish-ferru- 

 ginous, dark at tips. Legs colored as in ^ . Abdomen brown- 

 black, the margins of the segments subtestaceous. 



Hab. — Las Cruces, N. M., middle of August, 1895, on flowers of 

 Sphceralcea angustifolia, 3^,3?. (Ckll., 4,806, 4,809, 4,814, etc.) 

 It was associated with Diadasia and Halictus. 



Ohs.. P. arcuata Fox, the description of which reads rather like 

 latior, is of a different group, viz. that of californica, etc. 



Species of California and Mexico, with the cly2yeus in the $ 

 narroivly produced at the sides to the bases of the mandibles, resemb- 

 ling in, shape a panama hat. 



8. Perdita californica (Cr.) Cr., Cat. Hym., 1887, p. 296. 



^ Macrotera californica Cr., Tr. Am.^Ent. Soc, 1878, p. 71. (Hab., California). 



Three specimens are known, collected by Edwards and Crotch. 



