34 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



HALICTUS (CHLORALICTUS) LACTINEUS, new species. 



Male. — About 6 mm, long; head and thorax greenish blue; abdo- 

 men black; pubescence pure white. Facial quadrangle longer than 

 broad; orbits converging slightly below; the entire face, clypeus and 

 supraclj^peal area closely punctured; lower half of clypeus black; 

 mandibles red at the apex; antennae dark, third joint longer than 

 the second; flagellum rufo-testaceous beneath. Thorax densely 

 pubescent; meso thorax somewhat polished, microscopically lineolate, 

 very coarsely punctured, the punctures about the diameter of a punc- 

 ture apart; the disk with more scattered punctures; scutellum closely 

 punctured, with two large polished spots on the disk; disk of pro- 

 podeum crescentic, shining, the plicae extending to the posterior 

 margin which is sharply elevated; at the sides the plicae extend on 

 to the lateral sides of the propodeum; mesopleurae with coarse shal- 

 low punctures; truncation sharply defined laterally; tegulae honey 

 color, impunctate. Abdomen ovate, apical margins of segments 

 somewhat polished, narrowly testaceous; segments 1-3 delicately 

 punctured, quite sparsely pubescent; segments 4-5 with piliferous 

 punctures only, pubescence more abundant. Wings milky white; 

 anterior wing 4.25 mm. long; stigma and nervures honey color; the 

 second submarginal cell much higher than broad, receiving the first 

 recurrent nervure very near the apex; third submarginal broad at 

 the base, contracted above, at least twice as long as the second on 

 the marginal. Legs black; knees, apices of tibiae and tarsi yellow. 



Habitat. — Boulder, Colorado, August 4, 1908 (S. A. Rohwer). 



Type.— Cat. No. 26435, U.S.N.M. 



Differs: From albipennis Robertson by the more sparsely punc- 

 tured mesothorax; sculpturing of the disk of propodeum; smaller 

 size; paler tegulae; wings more milky white. 



From connexus Crawford by the more coarsely punctured meso- 

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

 wings; color of head and thorax. 



HALICTUS (CHLORALICTUS) CALLIDUS, new species. 



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

 men black; pubescence pure white. Facial quadrangle longer than 

 broad; orbits converging slightly below; face clothed with very dense 

 pubescence, closely punctured; antennae dark, second and third joints 

 of equal length; flagellum testaceous beneath; mandibles pale red- 

 dish. Thorax with dense, short pubescence; mesothorax opaque, 

 microscopically tessellate, closely punctured, punctures laterally 

 contiguous, on the disk the punctures are a little more than the 

 diameter of a puncture apart; punctation of the scutellum similar 

 to that of the mesothorax; disk of propodeum crescentic, shining, 



