HYMENOPTERA. 189 



138. MEGACHILE MORIO, n. s. B.M. 



Female. Length 6 lines. Black, the pubescence entirely 

 black, very dense on the face, sides of the metathorax, and basal 

 segment of the abdomen ; the following segments have a mar- 

 ginal fringe of the same colour ; the wings fusco-hyaline, the an- 

 terior tibiae punctured, not rugose. 



Obs. This species very closely resembles M. xylocopoides, but 

 appears on comparison to be distinct ; from the latter it differs 

 in having the vertex more deeply emarginate, the thorax more 

 closely punctured, the scutellum nearly covered with pubescence 

 and rounded behind, the anterior legs not rugose, and the abdo- 

 men much more pubescent. 

 Hab. United States. (Coll. E. Doubleday, Esq.) 



139. MEGACHILE XYLOCOPOIDES, n. s. B.M. 



Female. Length 6 lines. Black, the pubescence entirely 

 black, the clypeus, vertex, disk of the thorax, and abdomen 

 above naked, except a little at the sides of the basal segment ; 

 the scutellum slightly produced and somewhat pointed in the 

 middle of its posterior margin, and being, as well as the disk, 

 covered with large punctures, which are distant ; the anterior 

 tibiae rugose above ; wings very dark fuscous, having a brilliant 

 violet iridescence ; the abdomen above has a metallic reflection ; 

 beneath, the pollen-brush black. 



Male. Length 5 lines. Black, the face covered with pale pu- 

 bescence, towards the anterior margin of the clypeus it is white, 

 the cheeks fringed with long white hair ; the antennae capitate, 

 nigro-piceous beneath. Thorax, the metathorax at the sides has 

 some cinereous pubescence ; wings dark fuscous, and having a 

 violet reflection, towards their base subhyaline ; the anterior legs 

 testaceous, the apex of the femora and the tibiae above rufo- 

 fuscous, their tarsi dilated and having beneath a thick fringe of 

 white pubescence, its border narrowly black; the first joint of 

 the tarsi has a fringe of brown pubescence in front ; the coxae 

 armed with stout teeth; the intermediate and posterior tarsi 

 beneath covered with reddish-brown pubescence ; the interme- 

 diate tarsi elongate, the posterior pair stout, particularly the 

 basal joint, the tibiae slightly curved. 

 Hab. United States. (Coll. E. Doubleday, Esq.) 



140. MEGACHILE POLLICARIS. 



Megachile pollicaris, Say, Bost. Journ. Nat. Hist. i. 406(1837). 

 Hab. North America. 



