On some Bees of the Genus Megacliile. 125 



XX. — Some Bees of the Genus Megacliile from New Mexico 

 and Colorado. Bj T. D. A. CoCKERELL, Entomologist 

 of the New Mexico Agricultural Experiment Station. 



Megachile Wootoni, sp. n. 



(^ . — Length about 13 millim. 



Moderately robust, black, with rather thin yellowish pubes- 

 cence. Head ordinary, facial quadrangle about square, face 

 up to level of antennse with dense cream-coloured pubes- 

 cence ; vertex with large close punctures and thinly clothed 

 with long yellowish hair, with some shorter black ones inter- 

 mixed ; cheeks broad, very thinly pubescent, lower part with 

 a conspicuous broad transverse band of yellowish- white hair; 

 antennge wholly black, last joint broadened and fattened ; 

 mandibles tridentate, more or less elbowed, fringed beneath 

 with shining yellow hair beyond the bend ; a rounded tubercle 

 at base of mandible beneath, tufted with yellowish hair ; meso- 

 thorax strongly and closely punctured, with thin erect pubes- 

 cence, yellowish on anterior half, mostly black on posterior 

 half', scutellum and pleura with longer and denser hair, that 

 on the pleura yellowish white ; tegulaj black ; wings dusky 

 * hyaline, broadly darker on apical margin; nervures black, 

 second subraarginal cell receiving second recurrent nervure a 

 short distance before its apex ; legs black, with yellowish- 

 white hair ; four hind femora and tarsi ordinary, the tarsi 

 with fulvous hair on inner side ; spurs ferruginous ; middle 

 coxffi ordinary ; anterior coxse with a stout tooth, above which 

 at base is a well-defined patch of shining coppery hair ; the 

 tooth itself has a pale stripe on one side; anterior femora pale 

 orange ferruginous, with a black apex and a black stripe on 

 outer side from base to apex; anterior tibiae ferruginous 

 within, black without, broadly pale yellowish at apex, with a 

 broad rounded lamina projecting at right angles; anterior 

 tarsi cream-colour ; first joint hollowed, canoe-shaped, a little 

 produced at end, but not as far as tip of second joint, its end 

 rounded ; the basal two thirds of its inner edge with a narrow 

 fringe of very short fuscous or black hairs ; its outer margin 

 near the base within with some very short black hairs, not 

 forming a distinct patch, and easily overlooked ; its hind 

 margin with the usual long fringe of pale hair, of which the 

 inner hairs are strongly tipped with black ; remaining joints 

 of anterior tarsi gradually diminishing, formed as in allied 

 species ; abdomen rather short, fairly broad, nearly parallel- 

 ing, ffc Mag. N. Hist. Ser. 7. Vol. i. 10 



