38 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 05. 



3.75 mm. long; stigma and nervures pale testaceous; second submar- 

 ginal cell higher than broad, the first recurrent nervure joining the 

 second transverso-cubital; third submarginal broad below, contracted 

 above, little longer than the second on marginal. Legs black; tarsi 

 with yellowish hairs. 



Habitat — Longs Peak Trail, Colorado, July 18 at flowers Senecio 

 (W. P. Cockerel!). 



Type.— Csit. No. 26400, U.S.N.M. 



HALICTUS (CHLORALICTUS) PENSITUS, new species. 



Male. — About 5 mm. long; head and thorax blue-green; abdomen 

 black; pubescence white. Facial quadrangle longer than broad ; orbits 

 converging below; face shining, rather densel}^ pubescent; front closely 

 punctured; the punctures more scattered below; clypeus sparsely 

 punctured, lower half black; antennae browTi, second and third joints 

 of equal length; flagellum dark testaceous beneath. Thorax densely 

 pubescent; mesothorax shining, with punctures about the diameter 

 of a puncture apart, a little more scattered on the disk; punctation 

 of scutellum similar to that of the mesothorax; two polished spots 

 on the disk; disk of propodeum long, shining, with more or less irreg- 

 ular plicae not quite reaching the apex, which is polished ; mesopleurae 

 coarsely punctured; truncation distinct laterally; tegulae dark, im- 

 punctate. Abdomen narrowly ovate; apical margins of segments 

 very narrowly testaceous, polished; bases of segments delicatel}" punc- 

 tured, clothed with quite abundant pubescence. Wings clear; anterior 

 wing 3.75 mm. long; stigma and nervures pale testaceous; second 

 submarginal cell higher than broad, receiving the first recurrent nervure 

 near the apex; third submarginal contracted about one-half above, 

 hardly longer than the second on the marginal, receiving the second 

 recurrent nervure about one-fourth from the apex. Legs black. 



Habitat.— Boulder, Colorado, July 20 to August 1, 1908 (S. A. 

 Rohwer). Four specimens. 



Type.— Cat. No. 26441, U.S.N.M. 



Differs: From hortensis Lovell by the larger size; more abundant 

 pubescence; clear wings; reddish tegulae; head and thorax blue-green; 

 sculpturing of the disk of propodeum; legs black. 

 , From nevadensis Crawford by the clear wings ; abundant pubescence; 

 sculpturing of the disk of propodeum. 



HALICTUS (CHLORALICTUS) ACCENTUS, new species. 



Male. — About 6 mm. long; head and thorax olive green; abdomen 

 black; pubescence white. Facial quadrangle longer than broad; 

 orbits converging below; antennae dark, third joint somewhat longer 

 than second; flagellum rufo-testaceous; front very closely punctured; 

 below the punctures are more scattered; clypeus closely punctured; 

 the anterior margin of clypeus and mandibles chrome-orange. 



