12 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.65. 



From per parvus Ellis, which is very small and dark, with delicately 

 punctured tegulae; and has a golden green mesothorax and the disk 

 of the propodeum granular. 



HALICTUS (CHLORALICTUS) SEDI. new species. 



Female.— About 6 mm. long; dark greenish blue; pubescence dull 

 white, rather sparse. Facial quadrangle longer than broad; sides of 

 face, supraclypeal area, and upper portion of clypeus brassy green; 

 front very closely punctured, the punctures becoming more scattered 

 below; supraclypeal area and upper portion of clypeus with few deep 

 punctures; lower part of clypeus black, without punctures; flagellum 

 black, dark testaceous beneath. Mesothorax microscopically tessel- 

 late, with delicate punctures; scutellum closely punctured, two pol- 

 ished spots on the disk; disk of propodeum shining, with fine plicae 

 on the lateral, and anastomosing rugae on the median portions, pol- 

 ished at the apex; mesopleurae indistinctly punctured; tegulae testa- 

 ceous, impunctate; truncation well defined laterally. Abdomen 

 obovate, polished, very delicately punctured, without distinct hair 

 bands, but segments sparsely covered with hairs; apical margins of 

 segments testaceous. Anterior wing about 4.5 mm. long; wings quite 

 clear; stigma and nervures pale testaceous; second submarginal cell 

 as broad as high, receiving the first recurrent nervure near the apex! 

 almost equidistant with the third submarginal on marginal; subcostal 

 nervure very dark. Legs dark with dull white pubescence; hind spur 

 pectinate with four moderately long teeth. 



Habitat. — Boulder, Colorado: 1 specimen June 21, on Sedum steno- 

 petalum (Cockerell); 1 specimen May 20 (M. Pope). 



Type.— Cat. No. 26401, U.S.N.M. 



Distinguished by the highly polished abdomen, 



HALICTUS (CHLORALICTUS) ACADEMICUS, new species. 



Female. — About G mm. long; dark blue-green; pubescence yellowish 

 white. Facial quadrangle longer than broad; orbits converging 

 slightly below; the only punctures on the face piliferous; antennae 

 dark, flagellum ferruginous beneath; clypeus and supraclypeal area 

 smooth and highly polished, without punctures, flat; lower half of 

 clypeus black. Mesothorax shining, the only punctures piliferous; 

 disk of propodeum rather long, microscopically tessellate, weakly 

 plicate on the base only; truncation distinct laterally; tegulae very 

 pale testaceous, impunctate. Abdomen obovate, without distinct 

 hair bands, but the segments clothed with rather sparse pubescence; 

 apical margins of segments testaceous. Wings faintly yellowish; 

 anterior wing 4.2 mm. long; stigma and nervures pale testaceous; 

 third submarginal cell subquadrate, a little longer than the second 



