22 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



MEGACHILE SEMOTA, new species 



Male. — Length 9 to 10 mm. Robust, shining black, with short 

 abdomen; eyes pale pinkish gray; mandibles black; flagellum dull 

 red beneath, the sutures darker; tegulae dark red with a black semi- 

 circle; legs black, with anterior femora red beneath, and middle ones 

 obscurely so; abdomen reddened at each side basally; hair of face 

 and front white, with an admixture of black, most of clypeus and 

 supraclypeal area exposed; clypeus shining, densely punctured, but 

 with a broad, smooth median line, and a subapical pit; supraclypeal 

 area well punctured but shining; cheeks with white hair, but on under 

 side of head, below mandibles, it is reddish fuscous; cheeks broad, 

 sharply keeled behmd; vertex broad, shining, closely punctured, with 

 thin black hair, smooth areas next to the ocelli; mesothorax and 

 scutellum shining, with strong, well-separated punctures; mesothorax 

 almost hairless, but scutellum with much black or dark fuscous hair; 

 other parts of thorax with partly pale and partly reddish sooty or 

 fuscous hair; anterior coxae with small protuberances, hardly spines; 

 anterior tarsi simple, the basitarus with a black fringe behind ; ends 

 of tarsi obscurely rufescent; abdomen short and broad, shining, with 

 fine punctures, white hair bands reduced to rudiments at sides, but 

 entire band on fifth segment, and surface of sixth, with gray hair; 

 keel of sixth broadly rounded, entire. 



Type from Huachi, Beni, Bohvia, September (W. M. Mann). 

 Also from near mouth of Rio Mapiri, September (W. M. Mann). 

 Described from four males. In Schrottky's table runs nearest to 

 M. lamnula Vachal, which has red legs. 



Type and one parahjpe .—Csit. No. 29093, U.S.N.M. 



Two paratypes in author's collection. 



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