86 Mr. T. D. A. Cockerell on Bees of the 



/3. Stigma dark brown or black ; apex of wings dusky. 

 Andrena asclepiadis, Ckll., sp. n. 



(J. Length 10-12 millim Rather slender, with the abdo- 

 men long and subcjlindrical. Black, shining, face below 

 level of antennae primrose-yellow ; two black spots on clypeus ; 

 tubercles yellow, with two black dots ; tegular with a yellow 

 spot. Head rounded, somewhat broader than long; face 

 hardly pubescent, occiput and cheeks with ])ale greyish hairs; 

 lower margin of clypeus black, mandibles wholly black, pale 

 supraclypeal area much more nearly square than in mexi- 

 canorum ; antennae short, wholly black, first joint of flagellnm 

 not quite so long as second and third together. Clypeus with 

 large sparse punctures, vertex strongly punctured. Thorax 

 with the pubescence short, pale grey, and very sparse, but 

 enclosure of metathorax pubescent. Mesothoraxandscutellum 

 smooth and shining, with large, not particularly close, punc- 

 tures. Tegulse clear testaceous, with a light yellow mark ; 

 wings hyaline, tinged with ferruginous, outer margin, espe- 

 cially apically, smoky. Nervures brown ; costal nervure 

 black, stigma very dark brown. Marginal cell truncate, 

 appendiculate. Anterior tibiae mostly whitish in front, middle 

 tibia^, with a white patch at base ; tarsi ferruginous, last four 

 joints of hind tarsi black. Outer margin of hind tibiaj strongly 

 crenulated or subserrate. Claws deeply cleft. Abdomen 

 strongly punctured, segments with narrow basal white hair- 

 bands. 



Ilab. Santa F^, N. M., on white Asclej^'as-Rowers, Aug. 1, 

 1895 {Ckll. 4033). Also one at Albuquerque, N. M., be- 

 tween the town and the University, June 30, 1895 {Ckll. 

 3263). One at La Junta, Colorado, on a white-flowered 

 Asclepiad, July 1895 {Ckll. 3648). The La Junta example 

 is larger than that from Sta. Fe, and has the wings more 



shining, with large not particularly close punctures. Enclosure of meta- 

 thorax ill-defined, pubescent, quite densely at sides. Tegulse testaceous, 

 with a large yellow spot. "VVings hyaline, quite strongly tinged with 

 ferruginous ; apical region with a conspicuous smoky cloud. Nervures 

 brown, costal nervure black, stigma ferruginous. Marginal cell truncate, 

 appendiculate, second recurrent nervure slightly curved, but not as in 

 C'ulletes. Legs black ; a yellow spot at base of four anterior tibiae ; no 

 tuft of hair on hind trochanters ; claws ferruginous. Abdomen strongly 

 punctured, with narrow dull white hair-bands at bases of segments 2 to 4. 

 Anal timbria dull brownish. 



Hab. Juarez, Mexico, Aug. 26, 1S93 (Ckll. 493 a). 



Has some superficial resemblance to CoUetes inaqualts, Say. It is 

 nearest to A . asclepiadis. 



