12 Prof. T. D. A. Cockerell on 



portion of the abdomen curved downwards as in that species; 

 but the two are closely allied. 



Las Vegas Hot Springs, Aug. 10, at flowers of Senecio 

 Douglasii, two ( W. Porter) ; Las Vegas, July 22, at flowers 

 oi Eudbechia lociniata [W. Porter^] Aug. 9, at flowers of 

 Melilotus alba {W. Porter) ; Aug. \2 [A. Garlick). 



Megachile Toicnsendiana, Ckll., 1898. 



Las Cruces, Aug. 23, 4 (^ {Ckll. & Townsend) ; Rincon, 

 July 6, at flowers of Actinella, 2 J {Ckll.). 

 A species of the Middle Sonoran zone. 



Megachile pollicaris, Say, var. pereximia nov. 



(J . — Length 13 millim. 



Anterior and middle femora and tibige ferruginous ; hind 

 femora and tibise black ; middle tibise with a black basal 

 streak behind ; anterior tibiee yellow in front at apex ; second 

 joint of anterior tarsus white, with a long linear apical 

 process; apex of flagellum somewhat dilated. 



Ilab. Beulah, May 30, at flowers of wild plum ( W. 

 Porter) . 



Megachile Casadce, Ckll., 1898. 



Found as yet only in the Mesilla Valley. 



The female has the scopa entirely white; clypeus and 

 mandibles normal ; punctures of mesothorax large, the 

 intervals between them shining, and presenting some ex- 

 tremely minute punctures. 



Megachile soledadensis, sp. n. 



J . — Length 10 millim. 



Agreeing with the description of M. legalis, Cress., but 

 possessing the following peculiarities : — Eyes pale green ; 

 apical joint of flagellum broad and flattened; anterior coxse 

 with a bright ferruginous hair-patch, their spines short, 

 oblique, pointed, and slightly curved ; anterior femora with 

 the basal two fiiths above pale ferruginous, beneath with a 

 large yellowish keel, subtriangular in shape, like that of a 

 racing-yacht ; anterior tibia? three-sided, ferruginous, except 

 on the outer side ; anterior tarsi yellow, moderately dilated, 

 with a long white fringe, which is brov/nish within, second 

 joint with a conspicuous black spot within ; hind tibise stout, 

 their tarsi broadened ; hair of vertex and thoracic dorsum 



