1912] Cockerell — Neiv Bees from Brazil 45 



iginous streak at base; legs black, the middle ami anterior tibiae with a yellow spot 

 at base; hair of legs black, in part very dark fuscous, thin and yellowish-white 

 on outer side of anterior tibiae, and a fringe of the same color on their femora; scopa 

 of hind legs black, large and very coarse; abdomen black, moderately shining, with 

 short black hair, the first segment without pale hair, but that of the fifth thin and 

 white (best seen in lateral view), with an apical chocolate-colored fringe, and long 

 chocolate hairs on each side of apical plate; beneath, the fourth segment has a con- 

 spicuous fringe of light hair. 



Hab. — Independencia, Parahyba, Brazil {Mann & Heath). At 

 first sight this seems a most ordinary little species, just like several 

 of the nitida group. On closer examination, it appears not to be 

 a typical Centris, by reason of the venation, which in Schrottky's 

 table of Brazilian genera, would throw it out of Centris altogether. 

 It is however actually allied to some of the nitida series, especially 

 perhaps to C. hirhnanni; Friese, which however has a much shorter 

 first s. m., and the clypeus entirely black in the females. 



Centris ceratocephala sp. nov. 



Female. Length about 14 mm., unusually long and slender for a Centris, head 

 and thorax black, abdomen bright red; legs red, the anterior ones, and the middle 

 tibiae, suffused with black. Very close to C. bicornuta Mocsary, having the same 

 peculiar structure, but larger; the shining clypeus black with a triangular yellow 

 mark on each side; wings dusky, but not dark; abdomen with the first segment 

 suffused with blackish, but its hair all pale fulvous; second and third segments bare, 

 fourth with fuscous hair, fifth with fulvous; scopa of hind legs entirely light fulvo- 

 ferruginous. There is much black hair on the head above, both before and behind 

 the ocelli. Mandibles bidentate; labrum longer than broad, black with two very 

 large elongate yellow patches, which nearly meet in the middle line below, apex 

 strongly bidentate, lateral margins obtusely angulate near the middle; teeth at 

 sides of apex of clypeus long, black, cylindrical. Eyes dark brown. Hair of thorax 

 above fulvo-ferruginous, without any dark. 



Hab. — Manaos, Brazil {Mann & BaJcer). Possibly a subspecies 

 of C. bicornuta. Manaos is more than a thousand miles from the 

 type locality of bicornuta. 



Dianthidium heathi sp. nov, 



Male. Length about 5 mm.; head and thorax strongly and densely punctured; 

 clypeus, mandibles except apex, broad bands along inner orbits and two long narrow 

 bands passing just mesad of antennal sockets, all pale yellow; scape ferruginous; 

 a continuous orange band across occipital region; mesothorax with very large punc- 

 tures, black with somewhat more than the lateral thirds of the anterior margin 

 broadly yellow; a broad yellow band from axillae across scutellum, narrowly inter- 



