l6 CALIFORNIA ACADEMY OF SCIENCES. 



fine, indistinct punctures, shining; scutellum likewise 

 and not impressed; metathorax above at base with a 

 rather narrow transverse, curved, depression, which is 

 rugose within; tegular testaceous; wings subhyaHne, 

 strongly iridescent, nervures and stigma brownish, sec- 

 ond submarginal cell if anything narrowed a little less 

 than one-half at the top; tarsi apically testaceous, their 

 pubescence slightly brownish; abdomen with the apical 

 margins of the segments, particularly the dorsal ones, 

 testaceous, the last segment with subfuscous pubescence; 

 the ventral segments are rather strongly punctured. 

 Length, 5-5^ mm. 



Four specimens. Margarita Island, L. Cal. {Haines). 

 March. Resembles very much our ornatipes and alhi- 

 tarsis, but the dorsulum is much more finely punctured 

 than in either. 



Perdita sp. One specimen. Calmalli Mines, L. Cal. 

 {Haines). April. 



Perdita sparsa n. sp. 



$ . — Head and thorax light metallic green, clothed with 

 pale pubescence ; clypeus in the middle, glabrous, im- 

 punctate, on the sides rather strongly punctured; front 

 with strong sparse punctures, very strongly furrowed 

 down the middle; antenna? black, the flagellum beneath 

 testaceous; mandibles black, reddish at tips; labrum 

 black, with a very wide, longitudinal depression in the 

 middle ; dorsulum and scutellum with distinct, separated 

 punctures, the metathorax, at least the upper surface, 

 smooth; legs testaceous, with pale pubescence, the apex 

 of fore femora and the fore and medial tibia? in front, yel- 

 low; a longitudinal, ovate mark on clypeus in middle, 

 two smaller marks on each side of it, the inner orbits as 

 far as their middle, two spots on prothorax above, tu- 

 bercles and tegula?, all yellowish or whitish; wings hya- 



