ART. 12 MEGACHILID BEES FEOM BOLIVIA COCKERELL 21 



coarsely punctured; hair of thorax above scanty, pale in front and in 

 scutello-mesothoracic suture, a little black on mesothorax, and more 

 on scutellum; sides of thorax with dull white, faintly yellowish hair; 

 anterior coxae without spines; anterior tarsi simple, with only a short 

 fringe behind; anterior femora and tibiae red beneath; middle and 

 hind femora reddish black, their tibiae with an obscure red spot at 

 end; middle tarsi with only a short fringe (contrasting with the very 

 long fringe of M. lenticula); spurs very pale; wings brownish, darker 

 apically, dilute fuliginous in marginal cell and beyond; stigma and 

 nervures dark; abdomen short and broad, shining, v,4th white hair 

 bands at sides of segments only, that on fifth segment thinly contin- 

 uous; keel of sixth segment entire, hardly produced, not truncate; first 

 ventral segment with a broad stramineous margin. 



Cavinas, Beni, Bolivia, Januar}'^ (W. M. Mann). Described from 

 two males. Also runs to M. urhana Smith in Schrottky's table, but is 

 quite distinct. Another from Huachi, Beni, has darker tegulae. 



Type. —Csit. No. 29091, U.S.N.M. 



Paratype in collection of author. 



MEGACHILE TRICOSA, new species 



Male. — Length about 9 mm. Black, robust, with rather short 

 abdomen; hair of head and thorax pale fulvous, very scanty on thorax 

 above and with no black on scutellum; eyes pale brownish, blackened 

 in front; mandibles and antennae black; tegulae and legs black with 

 a more or less reddish tint; anterior femora and tibiae, and middle 

 femora largelj'", red beneath; face with orange-fulvous hair, not very 

 bright, clj^peus exposed except lov.^er margin, shining but rather 

 closely punctured, with no m.edian smooth line; vertex shining but 

 well punctured, its hair fulvous, very thin; mesothorax with smaller, 

 dense punctures, but shining between them; scutellum with very 

 small and dense punctures; anterior coxae with short spines, anterior 

 tarsi simple; fringes of anterior and middle tarsi short; hind basitarsi 

 with pale orange hair on inner side; wings dusky, dilute fuliginous 

 in marginal cell and beyond; nervures and stigma dark; abdomen 

 dullish, excessively minutely and closely punctured, reddish black, 

 hind edge of first segment shining; a little pale ochreous hair at sides 

 of segments 2 and 3, an entire thin band on margin of 4, and also a 

 thin band in the transverse sulcus; fifth and sixth segments covered 

 Avith dull pale ochreous hair; keel of sixth segment shining, shallowly 

 emarginate in middle, without salient angles or teeth; first ventral 

 segment with a broad hyaline margin. 



Tumupasa, Bolivia, December (\Y. M. Mann). Described from 

 one specimen. Falls in Schrottky's table as near to M. bertonii 

 Schrottky as anything, and really is somewhat allied. It could also 

 be run near M. Talaris Smith, but is not allied. 



Type.—Q,?ii. No. 29092, U.S.N.M. 



