22 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



shallow punctures; sides of face, part of the clypeus and supracly- 

 peal area microscopically lineolate, more sparsely punctured; lower 

 part of clypeus black, shinin?, with a few coarse punctures; flaeellum 

 dark testaceous, paler beneath and at the apex. Thorax quite densely 

 pubescent; meso thorax shining, microscopically lineolate, with mod- 

 erately close, shallow punctures, the punctures closer at the extreme 

 posterior and lateral margins; punctation of scutellum similar to 

 that of the mesothorax, two large polished spots on the disk; disk of 

 propodeum rather long, without a distinct inclosing rim, microscopi- 

 cally tessellate, with more or less discontinuous plicae; truncation 

 distinct laterally; tegulae very pale testaceous, impunctate. Abdo- 

 men obovate, shining, impunctate; segments 1-2 with sparse dull 

 white pubescence; segments 3-5 densely clothed with subappressed 

 dull white hairs; apical margins of segments 3-4 testaceous. Ante- 

 rior wing 4.5 mm. long; wings hyaline; stigma and nervures pale 

 testaceous; second submarginal cell higher than broad, receiving the 

 first recurrent nervure near the apex; third submarginal subquad- 

 rate, gently contracted above, httle longer than the second on mar- 

 ginal. Legs dark, with dull white hairs; knees and tarsi dark red; 

 hind spur pectinate with four moderately long teeth. 



Habitat. — Sterling, Colorado, July 10, 1920, on dandelion {Taraxa- 

 cum) (Sandhouse) 



Type.— C&t. No. 26416, U.S.N.M. 



HALICTUS (CHLOBALICTUS) VINTONENSIS, new species. 



Female. — About 5 mm. long; head and thorax olive green; abdomen 

 black; pubescence dull or yellowish white. Facial quadrangle dis- 

 tinctly longer than broad; inner orbits converging gently below; face 

 shining, clothed with quite abundant pubescence, rather closely and 

 delicately punctured; supraclypeal area sparsely punctured; clypeus 

 largely green, sparsely punctured, black below, fringed with yellowish 

 hairs; antennae largely dark, flagellum dark testaceous beneath; 

 mandibles red. Thorax shining with quite abundant pubescence; 

 mesothorax smooth, with very delicate punctures; scutellum with 

 disk largely polished, dull and delicately punctured at posterior mar- 

 gin; disk of propodeum long, without a distinct inclosing rim, micro- 

 scopically tessellate, with irregular rugae on basal portion only; 

 truncation distinct laterally; tegulae very pale testaceous, impunctate. 

 Abdomen ovate, shining, quite sparsely pubescent, impunctate; 

 apical half of segments 1-2 with bronzen reflections; anterior wing 

 4.2 mm, long; wings hyaline; stigma and nervures pale testaceous; 

 subcostal nervure very dark; second submarginal cell higher than 

 broad, receiving the first recurrent nervure very near the apex; third 

 submarginal hardly contracted above, almost twice as long as second 



