12G Mr. T. D. A. Cockerell on some 



sided ; with thin erect pubescence, yellowish on the first two 

 segments and the first half of the third, heyond that black, with 

 a little yellowish intermixed j 7io tendency to hair-hands ; apical 

 segment with a very broad and detp semicircular emargina- 

 tion ; subaincal ventral teeth "placed in a broad triangle, all 

 large and long, pointed. 



Hah. Knidoso Creek, New Mexico, 7800 feet, July 6, 

 asleep on a plant doubtfully referred to Vicia americana 

 (E. O. Wooton, 57). I had taken this for M.fortis, but it 

 is perfectly dislinct, and is apparently more allied to M.mela- 

 nophcea, Smith. The real M. fortis was taken by Prof. 

 Townsend on the west fork of the Gila River, July 16. 



Megachile perihirta, sp. n. 



^ . — Length about 12 millim. 



Moderately robust, black, with rather thin yellowish 



pubescence. Head ordinary, facial quadrangle a little longer 



than broad, slightly narrowed below ; face up to level of 



antennse with dense cream-coloured pubescence, but the very 



closely punctured clypeus, though somewhat hidden beneath 



a long projecting supraclypeal fringe, is itself pubescent only 



at tlie sides ; vertex with strong close punctures and erect 



yellowish pubescence, not mixed uith black ; cheeks broad, 



thinly ipuhescent, with two oblique bands of lohite hair on lower 



part; antennse wholly black, last joint somewhat flattened, 



but hardly broadened ; mandibles not elbowed, lov^er edge with 



a conspicuous yellowish-ferruginous stripe / behind base of 



mandibles is a broad projecting lamella, with a narrow line of 



minute white pubescence on its anterior face \ mesothorax dull, 



very closely punctured, with erect pubescence not hiding the 



surface, nowhere mixed loith block; about equally dense and 



of the same yellowish colour on scutellum and pleura ; tegulae 



piceous, closely punctured ; wings dull hyaline, broadly dusky 



at apex ; nervures black, second submarginal cell long, 



receiving second recurrent nervure almost at its apex; legs 



black, with pale hair ; middle femora incrassate, middle tibise 



arcuate ; middle tarsi simple, but first joint very pubescent, 



and with a long brush of pale hair behind ; spurs whitish ; 



hind tarsi within with copious orange-fulvous pubescence ; 



first joint of hind tarsi somewhat broadened; anterior coxse 



with a strong spine, at base of which is no bright pubescent 



patch ; anterior femora orange-fulvous, apical two-thirds 



black on outer surface, and on inner surface having a black 



stripe ; anterior tibise orange-fulvous becoming ferruginous, 



pellucid yellowish white at apex, on outer surface with a 



