Dees from New ^[exico. 17 



Allieil to M. rujimanus . 



Male unknown. 



fliih. Mesilla, May 10, two at flowers of Proaopis glandii^ 

 losn {Jessie Gusad) ; L\s Crucc.-*, one [Townsend) ; llincon, 

 July 5, at flowers of Ckilopais linear is, one {CklL). 



The maxillary palpi are covered with bristles. 



Megachile chilopsidi'sy sp. n. 



$ . — Length 14 millim. 



In form, size, and ])ubescencc 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. prosojyidis, being not greatly longer than 

 the second. 



Male unknown. 



Allied to M. rujimanus, which resembles this species in 

 the mandibles, and the last more in the clypeus. 



Ilah. Mesilla, one at flowers of Prosopis glandulosaj 

 May 13 (Jessie Casad) ; Rincon, one at flowers of Chilopsis 

 linearis, July 5 {CklL). 



Megachile populi, sp. n. 



$ . — Length about 13 millim. 



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

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

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

 long, dense, ami pure white; ant<'nnfo short, hardly reaching 

 to tegulffi, flagellum faintly ferruginous beneath ; vertex 

 strongly punctured, but the punctures separate ; clyjicus 

 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 ; tcgulie 



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



