DESCRIPTIONS OF NEW HYMENOPTERA. No. 3. 



By J. C. Crawford, 



Assistant Curator, Division of Insects, U. S. National Museum. 



Most of the species described in this paper were received for deter- 

 mination through the Bureau of Entomology, United States Depart- 

 ment of Agricuhure, and are of economic importance. The figures 

 made to illustrate certain details were all drawn vAih. the aid of the 

 camera lucida. Comparative measurements were made with an 

 eye-piece micrometer used in the Zeiss binocular microscope. 



Superfamily APOIDEA. 



HALICTUS SANSONI, new species. 



Female: — Length about 7 mm. Belongs to the group vdi\\ no 

 obsolescent wing veins and hair bands on the apical margins of the 

 abdominal segments. Black, the mesonotum with a greenish luster; 

 face above insertion of antennje closely punctured and finely lineolated ; 

 below the antennae the punctures sparser; clypeus, supraclypeal 

 area, and sides of face below, smooth, polished and with a few scat- 

 tered punctures; facial quadrangle subquadrate, the clypeus dis- 

 tinctly produced; mesoscutum and scutellum, smooth, shiny, the 

 punctures small, separated from each other by more than the width 

 of a puncture; metanotum closely, finely rugoso-punctate and tomen- 

 tose; propodeum finely rugulose and minutely reticulate, the rugulse 

 reaching the apex of the propodeum only medially; truncation not 

 surrounded by a salient carina; wings hyaline, veins and stigma honey 

 colored; second submarginal cell narrowed anteriorly, receiving the 

 first recurrent vein much before apex; third submarginal almost 

 twice as long as the second, narrowed one-half anteriorly; legs dark 

 brown, the pubescence yellowish-white, that on the inner side of hind 

 tarsi more yellowish; inner spur of hind tibiae with about six short 

 teeth; abdomen brownish, \vith very slight metallic luster, polished, 

 and finely, sparsely punctured; beyond the second segment, the abdo- 

 men very finely transversely rugosely-lineolate ; hair bands white, 

 those on segments one and two interrupted medially (worn ?) . 



Habitat. — -BanfT, Alberta, Canada. 



Type.—Cat. No. 13753, U.S.N.M. 



Proceedings U. S. National Museum, Vol. 41— No. 1855. 



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