10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



knees narrowly red; anterior and middle tibiae broadly light ferru- 

 ginous in front, black behind; hind tibiae black with a light yellow 

 stripe at base in front; anterior tarsi ferruginous, the others dark, hind 

 basitarsi with red hair on inner side; abdomen shining, strongly and 

 not very densely punctured; a broad entire yellow band on first seg- 

 ment, large transverse spot on each side of second, and broad bright 

 yellow bands on 3 to 6; ventral scopa dull white. 



Cavinas, Beni, Bolivia, January ( W. M. Mann) . Described from 

 one female. This is quite distinct from the previously described 

 species, being especially known by the entire bands on the abdomi- 

 nal segments except the second, and the marking of the clypeus. 

 There is some affinity with H. ecuadorium (Friese), in which, how- 

 ever, the band on first segment is interrupted. There is also some 

 resemblance to H.Jlavomarginaium ohscurior Schrottky, which differs 

 by the large yellow spot on the mesopleura, and other conspicuous 

 characters. It has been claimed that H. guttatum (Latreille), H. 

 flavopidum (Smith) , H. Jlavomarginatum (Smith) , and H. eleganiulum 

 (Smith) are all phases of one species, but this seems improbable. It 

 is very probable that H. elegantulum and H. flavopidum, both from 

 Santarem, are the sexes of one species. 



Type.— Cat. No. 29082, U.S.N.M. 



The one previously known Bolivian Anthidiine (AntMdium holwi- 

 ense Friese, from Mapiri) is not in the collection. It is a species 

 allied to A. rubripes Friese, with black ventral scopa, and red legs and 

 tegulae. Its affinity is with Argentine species to the southward.^ 



The Anthidiines from the Beni Basin, described above, are almost 

 totally unlike those of Peru. Not only do we lack all of the known 

 Peruvian species, but the nine known from that country {deceptum 

 Smith, garlep pi Schrottky, cuzcoense Schrottky , nig errimum Schrottky, 

 perumanum Schrottky, matucanense Cockerell, atricaudum Cockerell, 

 simulans Cockerell, and paitense Cockerell) are true Anthidium. I 

 did not find, nor have others found, any Dianthidium or Hypanthi- 

 dium. But as might be expected, the Brazilian Anthidiine fauna 

 much more closely resembles that of the Rio Beni though the re- 

 corded species are different. Of the 28 or 29 species and varieties 

 reported from Brazil, 15 are certainly or almost certainly Dianthidium, 

 while 6 are Hypanthidium. Anthidium latum Schrottky = {codoense 

 Ducke) and the introduced A. manicatum (Linnaeus) are typical 

 Anthidium. The others are more or less uncertain and require more 

 critical examination. The Paraguayan forms (17 species and varie- 

 ties recorded) are like those of Brazil, in being nearly all Dianthidium 

 and Hypanthidium. The 24 Argentine forms include species of 



i Since this was written Friese has published Anthidium bizonatum from Oruro. It is a species with 

 black hair and red legs, of the group of A. philippii Friese and A. euzona Perez. 



