16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



HAUCTUS (CHLORALICTUS) PACATUS, new species. 



Female. — About 6 mm. long; head and thorax dark green; abdomen 

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

 converging below ; antennae dark, the flagellum scarcely paler beneath; 

 front closely punctured; sides of face with shallow open punctures; 

 supraclypeal area and upper portion of clypeus microscopically lineo- 

 late and coarsely punctured ; lower half of clypeus shining black, with 

 few coarse punctures. Mesothorax broad, microscopically tessellate, 

 with moderately close, but coarse punctures evenly distributed over 

 the surface; scutellum finely punctured, two polished spots on the disk; 

 disk of propodeum without a distinct inclosing rim, microscopically 

 tessellate, with few slightly wrinkled plicae reaching the apex; trun- 

 cation well defined laterally; tegulae dark testaceous, impunctate. 

 Abdomen obovate, impunctate; the first segment almost without 

 hairs, the other segments sparsely clothed with short hairs. Wings 

 somewhat dusky; anterior wing about 4.5 mm. long; stigma and 

 nervures testaceous; second submarginal cell slightly higher than 

 broad receiving the first recurrent nervure near the apex; third sub- 

 marginal little longer than second on marginal. Legs dark with yel- 

 lowish white hairs; hind spur pectinate with four moderately long 

 teeth. 



Habitat. — Peaceful Valley, Colorado, 1919 (Cockerell). Two speci- 

 mens. 



Type.— C&t. No. 26407, U.S.N.M. 



HALICTUS (CHLORALICTUS) ALIUS, new species. 



Female. — About 5-5.5 mm. long; head and thorax blue-green; 

 abdomen black; pubescence white. Facial quadrangle somewhat 

 longer than broad; flagellum rufo-testaceous, paler beneath; front 

 with rather close shallow punctures, the punctures deeper and more 

 scattered on the sides of the face; supraclypeal area and upper half 

 of clypeus delicately punctured ; lower half of clypeus shining black, 

 coarsely punctured; fringed with yellowish hairs; mandibles red. 

 Thorax clothed with rather abundant pubescence; mesothorax shin- 

 ing, with faint microscopic lineolations and rather close, shallow 

 punctures; punctation of scutellum similar to that of the meso- 

 thorax, two polished spots on the disk; disk of propodeum long, 

 inclosed by a low rim, shining, microscopically tessellate, with faint, 

 very irregularly anastomosing rugae; truncation distinct laterally; 

 tegulae very pale testaceous, impunctate. Abdomen ovate, impunc- 

 tate; segments 1-2 shining, spri'sely pubescent; segments 3-5 clothed 

 with dense subappressed hairs. Wings very clear; anterior wing 

 4.25 mm. long; stigma and nervures very pale testaceous; second 

 submarginal cell considerably higher than broad, receiving first 



