BIRDS FROM BRAZIL AND SOUTHERN VENEZUELA—FRIEDMANN 437 
As pointed out in the original description of this form, the combina- 
tion of its characters and its range support the assumed mutational 
origin of the subspecies of this barbet as suggested by Chapman 
(Amer. Mus. Nov., No. 335, 1928). It is a scarlet-throated race, 
nearest to amazonicus, but comes from an area between two yellow- 
throated forms, aurantiicinctus to the north of it and hypochondriacus 
to the south of it. It differs from amazonicus, Tefe on the Amazon, 
in having the forehead and crown more streaked and suffused with 
ochraceous-orange to xanthine orange, less yellowish, and with the 
two large yellowish stripes on the interscapulars and upper back 
primuline to light cadmium yellow, as opposed to strontian to lemon 
yellow in amazonicus, and the sides and flanks more heavily flecked 
with blackish. Females of the two races are very similar to each 
other. 
Chapman found that his series of topotypical auratus from the 
Ucayali varied greatly, in fact so extensively as to include birds that 
matched examples of amazonicus as well. According to information 
received from Dr. J. T. Zimmer this series seems to cover the range of 
variation in the Rio Negro birds (transilens) but part of this may be 
an approach to the orange-throated form novaolindae. However 
unstable auratus may be in its terra typica, there is no such variability 
in the Rio Negro series. It seems possible that further material and 
study may indicate that auratus is merely an intermediate group 
between transilens, amazonicus, and novaolindae and not a fixed race. 
Pinto (Rev. Mus. Paulista, vol. 23, 1938, p. 511) has recorded 
specimens of this barbet from Sao Gabriel and Taracudé as C. a. 
nitidror. 
Family RAMPHASTIDAE: Toucans 
RAMPHASTOS TUCANUS CUVIERI Wagler: Cuvier’s Toucan 
Ramphastos cuvieri WaGLER, Systema avium, Ramphastidae, 1827, p. 5 (Amazon 
River region, Brazil). 
SPECIMENS COLLECTED 
lad. o&,2ad. 9, Brazil, Rio Cauabury, below mouth of Rio Maturac4d, Novem- 
ber 7, 1930. 
lad. 9, Brazil, Salto do Hud, Rio Maturacé, November 18, 1930. 
lad. 9, Brazil, Serra Imeri, near Salto do Hud, December 4, 1930. 
lad. 9, Venezuela, Brazo Casiquiare, February 6, 1931. 
Griscom and Greenway (Bull. Mus. Comp. Zool., vol. 81, 1937, 
pp. 427-430) have reviewed the present and closely allied toucans in 
what seems to be a satisfactory arrangement, which is here followed, 
although the dissenting comments of Todd’s paper (Proc. Biol. Soc. 
Washington, vol. 56, 1943, pp. 155-157) and of Gyldenstolpe (Kungl. 
Svenska Vet.-Akad. Handl., vol. 22, No. 3, 1945, pp. 112-113) have 
been duly considered. ‘The species name tucanus is apparently the 
correct one rather than monilis. 
760001—48——_5 
