126 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, beyond that black, icith 

 a little yellowish intermixed ; no tendency to hair-bands ; apical 

 segment with a very broad and deep semicircular emargina- 

 tion ; subapical ventral teeth placed in a broad triangle, all 

 large and long, pointed. 



Hah. Ruidoso 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 distinct, 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 

 antenna? 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 the sides ; vertex with strong close punctures and erect 

 yellowish pubescence, not mixed with black ; cheeks broad, 

 thinly pubescent, i^iVA two oblique bands of white hair on lower 

 part; antennaj wholly black, last joint somewhat flattened, 

 but hardly broadened ; mandibles not elbowed, lower edge with 

 a conspiicuous yellowish-ferruginous stripe ; behind base of 

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

 minute white pubescence on its anterior face-, raesothorax dull, 

 very closely punctured, with erect pubescence not hiding the 

 surface, nowhere mixed with black; about equally dense and 

 of the same yellow^ish 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 tibiaa 

 arcuate ; middle tarsi sim))le, 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 tibiee orange-fulvous becoming ferruginous, 

 pellucid yellowish white at apex, on outer surface with a 



