ART. 19. AMERICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 29 



beneath; front above the antennae closely punctured; below the 

 antennae, the supraclypeal area and clypeus with sparse deep punc- 

 tures; lower half of clypeus black. Mesothorax shining, greenish, 

 with faint microscopic lineolations; outside the disk, the punctures 

 are about the diameter of a puncture apart, on the disk, twice as far 

 apart; scutellum and metathorax shining, punctured; disk of propo- 

 deum crescentic, with a low, polished, inclosing rim, shining, with 

 plicae extending to the posterior margin; mesopleurae shining, coarsely 

 punctured; sides of propodeum delicately punctured; truncation dis- 

 tinct laterally; tegulae dark; impunctate. Abdomen slender, shin- 

 ing, the segments delicately punctured, except the apical margins of 

 the segments which are polished; sparsely pubescent. Wings faintly 

 dusky; anterior wing 2.5 mm. long; stigma and nervures dark; second 

 submarginal cell higher than broad; contracted above; first recurrent 

 nervure joining the second transverso-cubital; third submarginal 

 very broad, contracted about one-half above, little longer than second 

 on the marginal. Legs black. 



Habitat. —Boulder, Colorado, July 18, 1908 (S. A. Rohwer). 



Type.—Qs.t. No. 26427, U.S.N.M. 



Differs : From ruidosennsis Cockerell by the smaller size : plicae on 

 the disk of propodeum reaching the posterior margin; mesothorax 

 brassy; paler color, 



HALICTVS (CHLORALICTUS) INSULSUS. new species. 



Male. — About 5 mm. long; head and thorax dark blue; abdomen 

 black; pubescence white, sparse. Facial quadrangle about as broad 

 as long; orbits converging below; antennae dark brown, the second 

 and third joints of equal length; flagellum little paler beneath; front 

 above the antennae very closely punctured; the lower portion of the 

 front, supraclypeal area and clypeus more sparsely punctured; cly- 

 peus black, produced more than half its length below the lower mar- 

 gins of the eyes. Mesothorax and scutellum with moderately coarse, 

 shallow punctures, about the diameter of a puncture apart; disk of 

 propodeum without an inclosing rim, plicatulate at the base only, 

 the apex is polished; mesopleurae with shallow punctures; sides of 

 propodeum punctured; truncation not sharply defined, but distinct 

 laterally; tegulae dark, impunctate. Abdomen slender, the only punc- 

 tures piliferous; the apical margins of segments brownish. Wings 

 faintly dusky; anterior wing 4 mm. long; stigma and nervures dark; 

 the second submarginal cell as broad at the base as it is high, but 

 contracted almost one-half above, receiving the first recurrent nervure 

 very near the apex; third submarginal about twice as long as the 

 second on marginal. Legs black. 



Habitat. — Beulah, New Mexico, August 18 (W. Porter). 



Type.— C&t. No. 26428, U.S.N.M. 



