ART. 19. A.MEEICAN BEES OF THE GENUS HALICTUS SANDHOUSE. 17 



recurrent nervure near the apex; third submarginal subquadrate, 

 little longer than the second on marginal. Legs dark with dull white 

 hairs; knees, tips of tibiae, and tarsi pale rufo-testaceous; hind spur 

 pectinate with four moderately long teeth. 



Hahitat. — La Cueva, Organ Mountains, New Mexico, September 2, 

 at flowers of Nuttallia multijlora (Townsend) . 



2Vi>e.— Cat. No. 26408, U.S.N.M. 



HALICTUS (CHLORALICTUS) CADUCUS, new species. 



Female. — About 6.5 mm. long; head and thorax dark olive green; 

 abdomen black; pubescence dull white. Facial quadrangle longer 

 than broad; orbits converging slightly below; face with a bronze 

 reflection, clothed with rather sparse pubescence; antennae dark, the 

 flagellum becoming dark ferruginous at the apex; vertex very closely 

 punctured; front with more scattered deep punctures; part of clypeus 

 and supraclypeal area bronze green, sparsely punctured; lower half of 

 clypeus shining black, with a few downward-opening punctures, 

 fringed below with yellowish hairs; mandibles dark, reddish at the 

 tips. Mesothorax brassy green, shining, with faint microsopic tessel- 

 lations and scattered punctures; scutellum brassy green, delicately 

 punctured on the anterior part, the punctures coarser posteriorly, 

 two polished spots on the disk; disk of propodeum without a distinct 

 inclosing rim, slightly elevated posteriorly, median portion of disk 

 finely granular with a few anastomosing rugae, the lateral portions 

 plicatulate, the plicae extending on to the sides of the propodeum; 

 truncation distinct laterally; tegulae reddish testaceous, impunctatie. 

 Abdomen piceous, obovate; apical margins of segments testaceous; 

 segments 1-2 shining, sparsely pubescent; segments 3-5, with appres- 

 sed, dull white hairs. Wings clear yellowish; anterior wing 4.5 mm. 

 long; stigma and nervures very pale testaceous; second submarginal 

 cell almost as broad as long; first recurrent nervure joining second 

 transverso-cubital; third submarginal sharply contracted above, 

 about equidistant with the second on the marginal. Legs dark with 

 dull white pubescence; hind spur pectinate with three teeth. 



Ha&itoi.— Santa Fe, New Mexico, October 3, at garden marigold 

 No. 5620 (Cockerell). 



Type.—Csit. No. 26409, U.S.N.M. 



Differs; From versatus Robertson by the reddened tegulae; meso- 

 thorax shining, with more scattered punctures; more slender species; 

 face shining; more sparse pubescence; polished scutellum. 



From nevadensis Crawford by the larger size; more golden gr(;en 

 face and mesothorax; more sparsely punctured mesothorax; disk of 

 propodeum pJicatulate. 



