192 HYMENOPTERA. 



an ochraceous hue ; the legs and apical segments of the ab- 

 domen have a covering of black pubescence ; the tarsi beneath 

 fulvous ; the wings hyaline, faintly clouded at their apical mar- 

 gins. The brush on the abdomen beneath is of a blackish 

 brown. 



Male. Has the general appearance of the female, its pubes- 

 cence is longer, that on the face being very dense and of a pale 

 yellow colour ; the apical joint of the antenna dilated and com- 

 pressed : the anterior legs pale testaceous ; the apex of the 

 femora and the tibia? above black, the tarsi dilated and fringed 

 beneath with pale hairs ; the intermediate tarsi have a yellow 

 pubescence above, and are, as well as the posterior pair, fulvous 

 beneath, their claws ferruginous ; the apical segment deeply 

 notched, and on each side denticulate ; beneath the abdomen on 

 the ventral segment are two obtuse spines, and a little before 

 them a central acute one. 

 Hab. Nova Scotia (Lieut. Redman). Hudson's Bay (G. Barn- 



ston, Esq.). North America (E. Doubleday, Esq.) 



148. MEGACHILE ACUTA, n. s. B.M. 



Female. Length 6 lines. Black, the entire pubescence above 

 of a pale yellow, in some specimens fading to grey ; the legs 

 have a short pubescence of the same colour, beneath the tarsi it 

 is fulvous ; wings hyaline, faintly clouded at their apical margins. 

 Abdomen gradually tapering from the base to the apex ; the 

 base deeply emarginate, the second, third and fourth segments 

 have a transverse arched depression ; beneath, the pollen-brush 

 bright fulvous. 

 Hab. North America ; Trenton Falls ; New York (E. Doubleday, 



Esq.) ; Mexico. 



149. MEGACHILE VIDUA, n. s. B.M. 



Megachile maritima, Kirby, Faun. Boreal. Amer. p. 270. 1, ex- 

 clus. synon. ? 



Female. Length 6 lines. Black, the face covered with pale 

 ochraceous pubescence, brightest towards the margin of the cly- 

 peus, on the vertex and disk of the thorax it is dark fuscous, on 

 the sides of the thorax, beneath, on the legs above and at the 

 sides of the basal segment of the abdomen it is of a very pale 

 yellow, being nearly white at the sides of the metathorax, and 

 short and sparing on the legs ; wings subhy aline, ihe apical mar- 

 gins faintly clouded ; the tarsi fulvous beneath, on the anterior 

 and intermediate pairs it is of a bright golden -yellow above, the 



