ART. 19. AMERICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 25 



HAUCTUS (CHLORALICTUS) ACTUARIUS, new species. 



3Iale. — About 4.5 mm. long; brilliant blue; pubescence white, 

 sparse. Facial quadrangle distinctly longer than broad; orbits con- 

 verging sUghtly below; flagellum testaceous, yellow testaceous be- 

 neath; second and third joints of antennae of equal length; front 

 shining, with close, rather delicate punctures above antennae; punc- 

 tures below and on the supraclypeal area and clypeus delicate, but 

 more scattered; clypeus largely blue; mandibles dark reddish. Meso- 

 thorax shining, coarsely punctured, the punctures about twice the 

 diameter of a puncture apart; punctation of the scutellum similar 

 to that of the mesothorax; metathorax punctured; disk of propodeum 

 long, shining, without an inclosing rim, plicate laterally, medially 

 with irregularly anastomosing rugae; pleurae and sides of propodeum 

 coarsely punctured; truncation distinct laterally; tegulae honey color, 

 impunctate. Abdomen narrowly ovate, punctured, very sparsely 

 pubescent; apical margins of segments testaceous; margins of seg- 

 ments 1-2 punctured, of segments 3-5 punctureless. Wings very 

 clear; anterior wing about 3.25 mm. long; stigma and nervures honey 

 color, except the subcostal nervure which is testaceous; second sub- 

 marginal cell higher than broad, receiving the first recurrent nervure 

 near the apex; third submarginal practically quadrate, little con- 

 tracted above, more than twice as long as second on the marginal. 

 Legs largely black; knees red; tarsi yellow-testaceous. 



Hahitat— Boulder, Colorado, July 31, 1908 (S. A. Rohwer). 



Type.— C&t. No. 26421, U.S.N.M. 



Differs: From alhohirtus Crawford by the narrower thorax; less 

 abundant pubescence; sculpturing on the disk of propodeum. 



From pruinosiformis Crawford by the sparse pubescence; more 

 slender abdomen; sculpturing and color of the disk of propodeum. 



HALICTUS (CHLORALICTUS) SAGAX, new species. 



Male. — About 5.5-6 mm. long; head and thorax olive green; abdo- 

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

 inner orbits converging sharply below; face brassy, clothed with 

 dense hairs; flagellum brown, paler beneath; third antennal joint 

 longer than second; front above the antennae sparsely pubescent, 

 very closely punctured, below the antennae so closely covered with 

 plumose hairs that no punctures are apparent; lower half of clypeus 

 andjtips of mandibles reddish yellow. Thorax with sparse pubescence; 

 mesothorax and scutellum sliining brassy green, smooth, coarsely 

 punctured, the punctures much closer in the region of the median 

 and parapsidal grooves; disk of propodeum shining dark green, with 

 very coarse rugae extending to the posterior margin, thence over the 

 lateral [sides and covering the entire posterior surface; truncation 

 45554— 25— Proc.N.M.vol.65 39 



