ART. ID. AMERICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 23 



on the marginal. Legs black, covered with dense yellowish pubes- 

 cence; knees and tarsi clear red; hind spur pectinate with four mod- 

 erately long teeth. 



Habitat. — Vinton, Iowa, June 23, 1922 (Sandhouse). Two speci- 

 mens. 



Type.— Co-t. No. 26417, U.S.N.M. 



HALICTUS (CHLORALICTUS) GAUDIALIS, new species. 



Male. — About 4.5 mm. long; head and thorax brilliant blue; abdo- 

 men black; pubescence pure white. Face clothed with dense pubes- 

 cence; facial quadrangle longer than broad; inner orbits converging 

 sharply below; antennae dark brown, flagellum yellow-testaceous 

 beneath, second and third antennal joints of equal length; front closely 

 punctured, the punctures becoming hardly more scattered below 

 antennae and on supraclypeal area; clypeus largely black, produced 

 about two-thirds its length below the eyes, coarsely punctured. 

 Thorax slender, with moderately dense pubescence; mesothorax shin- 

 ing, coarsely and closely punctured; scutellum and metathorax closely 

 punctured; disk of propodeum cresccntic, shining, with a low inclos- 

 ing rim posteriorly, plicae radiating slightly, reaching the apex; 

 mesopleurae coarsely punctured; sides of propodeum punctured; trun- 

 cation distinct, but not sharply defined laterally; tegulae dark, opaque, 

 with close and deep punctures. Abdomen ovate, black, bases of seg- 

 ments clothed with fine white hairs, delicately punctured; apical 

 margins of segments polished. Wings clear; anterior wing 3.5 mm. 

 long; stigma and nervures testaceous; second submarginal cell twice 

 as high as broad, leceiving the first recurrent nervure very near the 

 apex; third submarginal broad at the base, contracted about one-half 

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

 or very dark brown; tarsi paler brown; pubescence moderately dense. 



Habitat. — La Jolla, California, August (Cockerell) . Two specimens. 



Type.—Q&t. No. 26418, U.S.N.M. 



HALICTUS ( CHLORALICTUS ) PAULULUS. new speceis. 



Male. — About 4 mm. long; head and thorax greenish blue; abdo- 

 men black; pubescence white. Facial quadrangle distinctly longer 

 than broad; orbits converging sharjjly below; face clothed with 

 dense white hairs; flagellum brown, rufo- testaceous beneath, second 

 and third antennal joints of equal length; front very closely punc- 

 tured above the antennae, the punctures more scattered below; clypeus 

 largely black, coarsely punctured. Thorax clothed with moderately 

 abundant pubescence, the hairs longeron the sides; mesothorax shin- 

 ing, with close, coarse punctures, the punctures about the diameter 



