18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 71 



MEGACHILE POLYODONTA, new species 



Male. — Length about 8.5 mm. Slender and parallel-sided, black, 

 with the femora, tibiae, and tarsi bright ferruginous; face and front 

 covered with long pale yellow hair; eyes pale red; mandibles black; 

 cheeks with long white hair; vertex nearly bare, broad, closely punc- 

 tured; mesothorax and scutellum shining, with weak delicate punc- 

 tures; area of metathorax dull; flagellum long, entirely dark, with the 

 faintest brown tinge beneath; hair of sides of thorax long and white; 

 dorsum with extremely thin erect black hair, longest on scutellum; 

 tegulae shining ferruginous; anterior wings with upper part fuliginous, 

 lower part dusky hyaline, stigma and nervures dark; anterior coxae 

 with short stout dark spines, rather easily overlooked; anterior tarsi 

 with first three joints broad, yellowish white, without any project- 

 mg process, the hind margin with a long white fringe, and the usual 

 black spot on inner surface; middle basitarsi with a long white fringe 

 behind, and part of this fringe on the apex of tibia; abdomen highly 

 polished; a deep sulcus at base of second and third segments; seg- 

 ments 1 to 5 with white hair bands, broadly failing in middle; seg- 

 ment 6 directed downv/ard, the margin of the transverse keel jagged, 

 with five or six irregular teeth; nearly all of venter shining light ferru- 

 ginous, with two white hair bands. The middle joints of hind tarsi 

 are black. 



Huachi, Beni, Bolivia, September (W. M. Mann). Described from 

 two males. In Schrottky's table falls near M. lohitarsis Smith, but 

 is not similar. 



Type.— C&t. No. 29086, U.S.N.M. 



Paratype in collection of author. 



MEGACHILE ANODONTA, new species 



MoJe. — Superficially just like M. polyodonia, with the same size, 

 slender form, red legs, yellyw hair on face, etc., but quite distinct by 

 the following characters: Subapical region of mandibles broadly red; 

 mesothorax and scutellum more distinctly punctured; a band of yel- 

 lowish hair in scutello-mesothoracic suture; wings not so dark; ante- 

 rior coxae not spined; anterior tarsi simple; anterior and middle 

 femora larger, more expanded; extreme bases of abdominal segments 

 2 to 4 rufescent; keel of sixth segment red, broadly rounded, entire, 

 not denticulate; red of venter stained with blackish in middle. 



Reyes, Bolivia, October (W. M. Mann). Described from one male. 

 The close resemblance to M. polyodonia surely indicates affinity; 

 hence a grouping of species by the character of the front legs would 

 be artificial, the legs being apparently independently modified in dif- 

 ferent series. In Schrottky's table this falls near M. giraffa Schrottky, 

 which has a much broader abdomen. 



Type.— Cat. No. 29094, U.S.N.M. 



