36 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



the apex; third submarginal subquadrate, contracted little above, 

 hardly longer than the second on the marginal. Legs black; knees, 

 tips of tibiae, and tarsi reddish yellow. 



Habitat. — East Falls Church, Virginia, July 22; and Chain Bridge, 

 Virginia, (type locality), June 14 (S. A. Rohwer). Two specimens. 



Type.— C&t. No. 26437, U.S.N.M. 



Differs from hortensis Lovell by more robust species; mesothorax 

 opaque, closel}^ punctured; orbits converging more sharply below; 

 paler flagellum; sculpturing of the disk of propodeum; paler wings. 



HALICTUS (CHLORALICTUS) GENUINUS, new species. 



Male. — About 5.5 mm. long; head and thorax blue-green; abdomen 

 black; pubescence white. Facial quadrangle somewhat longer than 

 broad; orbits converging below; face densely pubescent; front above 

 the antennae closely punctured, the punctures becoming more sparse 

 below; antennae dark, the second and third joints of equal length; 

 flagellum testaceous beneath; mandibles red at the apex. Thorax, 

 with quite dense, short hairs, mesothorax opaque, microscopically 

 tessellate, very closely punctured, the punctures on the disk about 

 twice as far apart; punctation of the scutellum similar to that of the 

 mesothorax; two smooth spots on the disk; disk of propodeum cres- 

 centic, shining, inclosed posteriorly by a low rim, plicae reaching the 

 posterior margin and extending on the sides of the propodeum; trun- 

 cation distinct laterally; tegulae testaceous, impunctate. Abdomen 

 narrowly ovate; apical margins of segments transversely lineolate; 

 bases of segments with delicate piliferous punctures and dense, short 

 hairs. Wings clear hyaline; anterior wing 4.25 mm. long; stigma 

 and nervures pale testaceous; second submarginal cell higher than 

 broad, contracted above, receiving the first recurrent nervure a little 

 distance from the apex; third submarginal almost as broad as high, 

 contracted above, one and one-half times as long as the second on the 

 marginal. Legs black, with quite abundant hairs; knees, tips of 

 tibiae, and tarsi reddened. 



Habitat. — Chain Bridge, Virginia, June 14 (S. A. Rohwer). 



Type.— C&t. No. 26438, U.S.N.M. 



Differs from ^or^ensis Lovell by the larger, more robust size; darker 

 flagellum; more closely punctured mesothorax; darker tegulae; sculp- 

 turing of the disk of propodeum. 



HALICTUS (CHLORALICTUS) BASILICUS, new species. 



Male. — About 5.5-6 mm. long; head and thorax blue-green; abdo- 

 men black ; pubescence white. Facial quadrangle considerably longer 

 than broad; orbits converging sharply below; entire face closely punc- 

 tured and clothed with dense pubescence; antennae dark, second and 



