(411 ) 
I agree with Mr. Ridgway * that there is no reason for rejecting Linnaens’ 
name, which is accompanied by a much better description than Latham’s generally 
accepted term ¢inus.t 
A, superciliosus has a wide range in tropical South America. 
(388. Asturina nitida nitida (Lath.). 
* Falco nitidus Latham, Ind. Orn. i, p. 41 (1790.—Cayenne). 
Asturina nitida Pelzeln, l.c. p. 3 (Borba). 
Right bank: Borba (Natterer). 
Generally distributed over tropical South America from Southern Brazil north 
to Guiana and Panama. | 
389. Rupornis magnirostris magnirostris ((Gm.). 
Falco magnirostris Gmelin, Syst. Nat. 1. i. p. 282 (1788.—2x D'Aubonton, Pl. enl. 464: Cayenne). 
A stur macrorhynchus Pelzeln, l.c. p. 6 (Borba). 
Rupornis m. magnirostris Hellmayr, Nov. Zool. xiv. p. 406 (Humaytha). 
No. 510. ¢? ad., Calama, 3, ix. 1907.—Wing 225; tail 154 mm. 
No. 882. ? ad., Marmellos (left bank), 29. xii. 1907.—Wing 223; tail 157 mm. 
No. 327. 2% juv., Calama, 2. viii. 1907. 
“Tris and feet yellow, bill black, cere yellow.” 
The adult female from Calama is typical of magnirostris, agreeing perfectly 
with our large series from Cayenne and Venezuela (Caura). The chest is ashy, 
slightly tinged with pale fulvescent, and the cross-bars of the lower breast and 
belly are light rufescent brown. The Marmellos bird, on the other hand, is mach 
more rufous underneath, the chest being bright cinnamon and the cross-bands of 
the belly and thighs being more deeply rufescent. It is practically identical with 
an adult bird from El Loreto, Rio Napo, Eastern Ecuador, in the Munich Museum, 
while other specimens from the same district closely resemble typical magnirostris. 
Two adult males from the Rio Purts, and an adult female from the Upper Ucayali, 
have similarly coloured under parts to those of the Marmellos example. Without 
additional material it is impossible to say whether these rafous specimens are 
merely intergrades between magnirostris and natterert (from the latter of which 
they are not easily distinguishable) or represent a constant, peculiar race. 
(390. Busarellus nigricollis (Lath.). 
Falco nigricollis Latham, Ind. Orn. i. p. 35 (1790.—Cayana). 
Busarellus nigricollis Hellmayr, Nov. Zool. xiv. p. 406 (Humaytha). 
Left bank : Humaytha (Hoffmanns). } 
(391. Urubitinga urubitinga (Gm.). 
Falco urubitinga Gmelin, Syst. Nat. 1, i. p. 265 (1788.—ex Brisson: cx Marcgrave : 
Brazil). : 
Urubitinga brasiliensis Pelzeln, 1.c. p. 2 (Cachoeira do Madeira, Borba). 
Cachoeira do Madeira, Borba (Natterer). : 
Ranges all over tropical America from Paraguay to Costa Rica. | 
126. 
Eastern 
* Bull. U.S. Geol. and Geog. Sure. Terr. for April 1876. ii, No. 2. p. 
+ Ind. Ornith. i. 1790. p. 50 (Cayenne). 
