ART. 19. AMEEICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 19 



brownish testaceous. Wings clear yellowish; anterior wing about 

 4 mm. long; stigma and nervures very pale testaceous; second sub- 

 marginal cell higher than broad, gently contracted above; receiving 

 first recurrent nervure very near the apex; third submarginal quite 

 sharply contracted above, little longer than second on marginal. 

 Legs dark brown, with dull white hairs; hind spur pectinate with 

 three moderately long teeth; apical tarsi somewhat reddened. 



Hahitat. — Las Cruces (College Farm), New Mexico, on Melilotus, 

 No. 2914 (Cockerell). 



Type.—Csit. No. 26411, U.vS.N.M. 



HALICTUS (CHLORALICTUS) MERITUS, new species. 



Female. — About 5.5 mm. long; head and thorax dark green; abdo- 

 men black; pubescence white, rather sparse. Facial quadrangle some- 

 what longer than broad; orbits converging slightly below; antennae 

 dark, the flagellum hardly paler beneath; face with quite close, 

 shallow punctures; above, the punctures become more dense; supra- 

 clypeal area and upper half of clypeus microscopically Irneolate, 

 sparsely punctured; lower half of clypeus black, very coarsely puns- 

 turcd, fringed with yellowish hairs. Mesothorax shining, microscop- 

 ically lineolate, punctured, the punctures about twace the diameter 

 of a puncture apart; scutellum similarly punctured, with two pointed 

 spots on the disk; disk of propodeum shining dark blue, crescentic, 

 without an inclosing rim, with coarse plicae not reaching the apex 

 which is polished; truncation not sharply defined, but distinct 

 laterally; tegulae red-testaceous, impunctate. Abdomen obovate, 

 shining, impunctate; bases of segments with narrow bands of white 

 appressed hair; apical margins of segments dark testaceous. Wings 

 hyaline, faintly iridescent; anterior wing 4.25 mm. long; stigma 

 and nervures rather pale testaceous; second submarginal higher than 

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

 submarginal very broad at the base, contracted above, about one and 

 one-third times as long as second on the marginal. Legs black with 

 yellowish hairs. 



Habitat. — Halfway House, Pikes Peak, Colorado, May 30, at flowers. 

 Fragaria (Cockerell). 



Type.— Cat. No. 26412,U.S.N.M. 



HALICTUS (CHLORALICTUS) ARCANUS, new species. 



Female,. — About 6 mm. long; head and thorax blue-green ; abdomen 

 black; pubescence white. Facial quadrangle longer than broad; 

 orbits converging quite sharply below; face covered with rather sparse 

 pubescence; antennae very dark brown, almost black, hardly paler 

 beneath ; front closely pimctured ; sides of face with scattered, outward 

 opening punctures; supraclypeal area and upper half of clypeus with 



