ART. 19. AMERICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 27 



HALICTUS (CHLORALICTUS) OCCULTUS, new speclea. 



Male. — About 6.5 mm. long; head olive green; thorax largely blue- 

 green; abdomen black; pubescence white. Facial quadrangle dis- 

 tinctly longer than broad; orbits converging sharply below; front 

 above the antennae without hairs, very closely punctured, below the 

 antennae the punctures are more scattered and the pubescence is 

 dense; supraclypeal area opaque, microscopically lineolate, sparsely 

 punctured; lower half of clypeus and mandibles very pale yellow; 

 antennae dark testaceous, flagellum testaceous beneath; second and 

 third antennal joints of equal length. Thorax with moderately dense 

 pubescence; mesothorax shining, with delicate punctures, the disk 

 blue, the lateral and posterior margins blue-green; punctation of scu- 

 tellum similar to that of the mesothorax; disk of propodeum shining 

 blue, laterally with a few coarse plicae which extend over on the sides; 

 the median portion is irregularly rugose; truncation distinct laterally; 

 tegulae dark, impunctate. Abdomen slender, impunctate, sparsely 

 pubescent; the apical margins of the segments testaceous, A\'ith micro- 

 scopic transverse lineolations. Wings clear hyaline; anterior wing 5 

 mm. long; stigma and nervures testaceous; second submarginal cell 

 higher than broad, receiving the first recurrent nervure near the apex; 

 third submarginal little broader than high, about one and one-half 

 times as long as the second on the marginal. Legs black; knees, 

 apices of tibiae and tarsi j^ellow; the front legs with tibiae entirely 

 yellow; pubescence on legs short, pure white. 



Habitat. — Florissant, Colorado, July 23, at flowers Potentilla 

 (Cockerell). 



Type.— Cat. No. 26424, U.S.N.M. 



Differs: From Tiortensis Lovell by the larger size; brassy face and 

 mesothorax; clear wings; legs black; narrower face. 



From nevadensis Crawford by the narrower, brassy face; paler 

 flagellum; brassy mesothorax and scutellum; clear wings; sculpturing 

 on disk of propodeum. 



HALICTUS (CHLORALICTUS) EVESTIGATUS, new species. 



Male. — About 6-6.5 mm. long; head and thorax blue-green; abdo- 

 men black; pubescence white. Facial quadrangle somewhat longer 

 than broad; orbits converging slightly below; antennae dark brown, 

 third joint longer than the second; flagellum yellow-testaceoi's 

 beneath; front above antennae with close, shallow punctures, below 

 sparsely punctured and clothed with dense pubescence; the lower half 

 of the clypeus pale yellow; mandibles dark, red at the apex. Thorax 

 with moderately dense short hairs; mesothorax and scutellum shining, 

 with coarse punctm*es, the punctures hardly the diameter of a punc- 

 ture apart; disk of propodeimi long, shining, without an inclosing rim, 



