AET. 19. AMEKICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 41 



and third antennal joints of equal length; flagellum testaceous, 

 yellowish beneath; mandibles somewhat orange-yellow. Thorax 

 with moderately dense pubesceuce; mesothorax shining, delicately 

 punctured; scutellum with similar punctation; two polished spots 

 on the disk; disk of propodeum dark green, crescentic, shining, with 

 irregularly anastomosing rugae covering the entire area; tegulae honey 

 color, impunctate; truncation not sharply defined, but distinct later- 

 ally. Abdomen ovate, impunctate; apical margins of segments trans- 

 versely lineolate, testaceous; bases of segments clothed with rather 

 abundant pubescence. Wings clear; anterior wing 3.5 mm. long; 

 stigma and nervures very pale testaceous ; second submarginal cell 

 higher than broad, receiving the first recurrent nervure a little dis- 

 tance from the apex; third submarginal subquadrate, little contracted 

 above, almost twice as long as the second on marginal. Legs brown; 

 knees, tips of tibiae, and tarsi yellow. 



Habitat. — ^East Falls Church, Virginia, July 16, at flowers Cicuta 

 maculata and July 20, at flowers Daucus carota (type). Two 

 specimens (S. A. Rohwer.) 



Type.— C&t. No. 26445, U.S.N.M. 



Differs : From Tiortensis Lovell by the narrower face ; paler wings 

 and tegulae; paler flagellum; sculpturing of the disk of propodeum; 

 mesothorax more closely punctured. 



From nevadensis Crawford by the more delicately punctured meso- 

 thorax; flagellum pale beneath; sculpturing of the disk of propodeum; 

 abdomen brown, the only punctures piliferous; legs brown, with knees 

 and tarsi yellowish. 



HALICTUS (CHLORALICTUS) INSOLITUS, new species. 



Male. — About 4.5-5 mm. long; head and thorax green; abdomen 

 black; pubescence white. Facial quadrangle longer than broad; 

 orbits converging slightly below; front with very close, but shallow 

 punctures; below the punctures are more sparse; clypeus largely 

 black, quite closely punctured; antennae dark, third joint hardly 

 longer than the second; flagellum rufo-testaceous beneath; mandibles 

 reddish yellow. Thorax with moderately close, short hairs; meso- 

 thorax microscopically lineolate, closely and delicately punctured; 

 punctation of scutellum similar to that of the mesothorax; disk of 

 propodeum subcrescentic, with irregular rugae reaching the apex, 

 which is sHghtly elevated; tmncation distinct laterally; tegulae very 

 pale testaceous, impunctate. Abdomen slender, shining, impunctate ; 

 apical margins of segments polished, testaceous; bases of segments 

 clothed with sparse, short hairs. Wings faintly dusky; anterior 

 wing 3.5 mm. long; stigma and nervures testaceous; second submar- 

 ginal higher than broad ; first recurrent nervure meeting the second 

 transverso-cubital ; third submarginal contracted about one-third 



