16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 71 



hairs on clypeus, but it also has recumbent pale hair, apically form- 

 ing a conspicuous white or yellowish white beard; surface of clypeus 

 finely granular, no smooth line; mandibles black, an obscure red spot 

 at base of outer tooth; vertex dull and finely granular-punctate; fla- 

 gellum slender, simple, light ferruginous beneath; mesothorax dull, 

 minutely granular-punctate; scutellum convex, shining, with few 

 weak punctures; hair of head and thorax above pale yellowish, ful- 

 vous above tegulae (which are clear ferruginous) ; pleura with long 

 white hair; wings strongly tinged with orange, dusky at apex; ante- 

 rior coxae with only very short pointed spines, easily overlooked; 

 anterior femora beneath and tibiae in front largely rufous; anterior 

 and middle tibiae with a red spot on outer side at apex; anterior tarsi 

 with a rather short fringe of white hair, middle tarsi with a much 

 longer fringe; hind basitarsi with reddish black hair, on inner side 

 deep red; abdomen shining, with narrow white hair bands, some- 

 times abraded and lost; keel of sixth segment broadly and deeply 

 emarginate, the borders of the emargination ferruginous; base of 

 venter broadly black in middle, light ferruginous at sides. 



Type locality.— Femede, Ivon, Beni, Bolivia, February (W. M. 

 Mann) ; male, Cavinas and Blancaflor, Bolivia, January ( W. M. Mann) . 

 Distinguished from M. rubricata Smith by the dark legs, and from 

 M. guaranitica Schrottky b}^ the margin of clypeus not crenulate. 

 It is really allied to M. leucocentra Schrottky (which I have from 

 Schrottky), for which it might be taken on superficial examination, 

 but M. leucocentra has the abdominal bands much broader and bright 

 yellow, and the middle tarsi, with broad joints, are very different. 

 The male runs in Schrottky's table near J/, exaltata Smith, but is 

 very different. 



Type and one paratype.—Cht. No. 29085, U.S.N.M. 



Two paratypes in collection of author. 



MEGACHILE SCAPULARiS Vachal 



Female. — Ivon, Beni, Bolivia, February (W. M. Mann). Described 

 from Mapiri, Bolivia and (male) Pachitea, Peru. I will designate 

 the female from Mapiri as the type. This is closely allied to M. 

 mariannae, showing that the peculiar facial structure must have 

 arisen in this immediate group, and apparently indicating that other 

 species more or less similarly formed are not necessarily closely related. 

 It seems to me that this female must belong with M. crassipes 

 Smith, owing to the very close general resemblance, the black hair at 

 base of clypeus, and the first recurrent nervuie nearer first intercu- 

 bitus than in M. mariannae. Vachal's description of the male also 

 agrees well with my identification of M. crassipes; a point to be added 

 is that the second joint of middle tarsus has a little tooth on inner 

 side. 31. crassipes was described from Sao Paulo on the Amazon. 



