82 A I'll). K. 



pulx'scont, that on the clyixMis slij^lilly fulvous ; the vertex with 

 a little Idiick jmbescence. The thorax on the sides and beueath 

 with white i)ubesc'enco; above, it is thin and mixed with black ; 

 wiiiijs snbhyaline, the norvures and loj^uhe black ; the tirsi joint of 

 the tarsi with fulvous pubescence beneath. Al)domen slij^htly 

 shininii:, with a tliin, short, black pubescence above; the apical 

 inar}j;ins of the segments with narrow yellowish-white pubescence ; 

 beneath densely clothed with pale fulvous pubescence, except on 

 the two apical segments, where it is black. 



Hah. Mexico, Oajaca. 



GO. Megachile breviuscnla. 



Female. Length 5^ lines. — Black, short and broad, with fulvo- 

 hyaline wings, the ncrvures fusco-ferruginous. Tho vertex 

 shining and very finely punctured ; the dypeus shining and 

 ha^•ing stronger punctures ; the sides of the face with griseous 

 pubescence, on the vertex it is fuscous and thin ; the flagellum 

 fulvous beneath, except at the base and apex ; the mandibles fer- 

 ruginous, with the base and apex black. The thorax with a thin 

 short fuscous pubescence above ; on the metathorax, the sides, and 

 beneath it is whitish ; the teguLc, the tarsi, tips of the femora and 

 of the tibia) ferruginous. Abdomen short and cordate, with a little 

 thin pale fulvous pubescence at the base ; the apical margins of 

 the segments with narrow pale fulvous pubescent fasciae ; densely 

 clothed beneath with a glittering pubescence, which changes in 

 colour when viewed in different lights ; whitish in the middle, and 

 brown mixed with black at the sides. 



Hah. Mexico, Orizaba. 



61. Megachile irritans. 



Female. Length 5 lines. — Black, with fuscous wings, the anterior 

 l)air with the front margin dark fuscous with a violet iridescence. 

 The face with white pubescence ; the clypeus strongly punctured, 

 its anterior margin slightly emarginate ; the vertex with a little 

 black pubescence. Thorax shining, finely and not very closely 

 j)unctured : a fringe of black pubescence passes along the posterior 

 margin of the scutcUum to the insertion of the posterior wings ; at j! 

 the lateral angles of the metathorax and beneath the tegulse, in 

 front, there is a tnft of white pubescence ; the claws of the tarsi 

 ferruginous. Abdomen cordate, shining, except the apical seg- 

 ment, which is opaque ; the sides with a little black pubescence ; 

 beneath densely clothed with white pubesceuce. 



Hah. Mexico, Orizaba. 



62. Megachile Candida. 



Female. Length 5| lines. — Black, with the pubescence pale ful- 

 vous. The face pubescent, the clypeus slightly so, and punctured ; 



