Bees from New Mexico. 17 



Allied to M. rujlmanus . 



Male unknown. 



Hah. Mesilla, May 10, two at flowers of Prosopis glandu- 

 losa [Jessie Gasad) j Las Cruces, one (Townsend) ; Rincon, 

 July 5, at flowers of Ghilopsis linearis, one ( Gkll.) . 



The maxillary palpi are covered with bristles. 



Megachile chilopsidis, sp. n. 



? . — Length 14 millim. 



In form, size, and pubescence just like M. prosopidis, so 

 that, without looking at the face, one would take it for the 

 same species, but clypeus and mandibles entirely different. 

 Clypeus extremely short, produced in the middle into a very 

 broad truncate lobe, more than twice as broad as long, pro- 

 jecting, shining and punctured above ; labrum broadly trun- 

 cate and thickened at end, the lateral corners pointed, the 

 middle with a narrow brush of brown hairs directed obliquely 

 backwards; mandibles long and narrow, somewhat broadened 

 at apex, with three small teeth ; a large open space between 

 the mandibles and the clypeus. First joint of labial palpi 

 shorter than in M. prosopidis, being not greatly longer than 

 the second. 



Male unknown. 



Allied to M. rufimanus, which resembles this species in 

 the mandibles, and the last more in the clypeus. 



Flab. Mesilla, one at flowers of Prosopis glandulosa, 

 May 13 (Jessie Gasad) ; Rincon, one at flowers of Ghilopsis 

 linearis, July 5 [Gkll.). 



Megachile populi, sp. n. 



? . — Length about 13 millim. 



Black, with white pubescence ; black on disk of mesothorax, 

 middle of scutellum, and vertex, but in these places thin, 

 wholly exposing the surface ; hair of cheeks and sides of face 

 long, dense, and pure white ; antennse short, hardly reaching 

 to tegulge, flagellum faintly ferruginous beneath ; vertex 

 strongly punctured, but the punctures separate ; clypeus 

 shining, strongly punctured at the sides, the punctures evanes- 

 cent on the disk, anterior edge straight and normal; man- 

 dibles normal, 4-dentate counting the inner angle ; first joint 

 of labial palpi very broad, shorter than the second ; meso- 

 thorax shining, though microscopically tessellate, densely 

 punctured at the sides, sparsely in the middle ; tegulae 



Ann. & Mag. N. Hist. Ser. 7. Vol. vi. 2 



