( 391 ) 
328. Bucco hyperrhynchus Scl. 
Buceo hyperrhynchus Sclater, Proc. Zool. Soc, Lond. xxiii. 1855. p. 193. pl. ev. (Jan. 1856.—‘ Upper 
Amazons”); Hellmayr, Nov. Zool. xiv. p. 399 (Humaytha). 
No. 785. ? ad., Allianca, 13. xi. 1907—Wing 116; tail 90; bill 40} mm, 
“Tris yellowish red, feet and bill black.” 
This bird, as well as the two from Humaytha obtained by Mr. Hoffmanns on 
his first Madeira journey, belong undoubtedly to the same form as a series from 
Pari. But whether the so-called B. dysoni Scl. from Central and Western Sonth 
America is really separable appears to be very questionable, since there is much 
individual variation as regards size of the bill and amount of white on the fore- 
head. Yet I have never seen any specimen from Central America, Ecuador, etc., 
that had so powerful a bill as is often found in collections from Para. 
On the other hand, B. macrorhynchos Gm. (ex Cayenne, British Guiana, Rio 
Branco and Manios) is quite distinct specifically, and easily recognizable by the 
lack of the white forehead, its shorter bill, and by having the feathers of the black 
pectoral band narrowly margined with white. 
(329. Bucco tamatia tamatia Gm. 
Buceo Tamatia Gmelin, Syst, Nat. 1, i. p. 405 (1788.—ex D’Aubenton, PI. enl. 746. fig. 1: Cayenne) ; 
Pelzeln, Orn, Bras. i. p. 22 (Engenho do Gama, S. Vicente, Borba). 
Right bank: Borba; Engenho do Gama and Sao Vicente, Rio Guaporé 
(Natterer), s 
Thanks to the kindness of Dr. Lorenz, Natterer’s series has been submitted to 
my inspection. Besides four examples from the upper Rio Negro, there are two 
adult females from Borba, an adult male and a young female from 8. Vicente, 
and the Munich Museum possesses an adult male obtained at Engenho do Gama. 
This series agrees, in the deep tawny colour of the throat, amount of black spotting 
on the lower parts, size, etc., with numerous specimens I have from Cayenne, British 
Guiana, Maipures (Orinoco), and Surinam, and unquestionably represents typical 
B. t. tamatia.| 
(330. Bucco tamatia pulmentum Scl. 
Bucco pulmentum Sclater, Proc. Zool. Soc, Lond. xxiii, 1855. p. 194. pl. evi. (Jan, 1856.—* Upper 
Amazons’’). 
B. t. pulmentum Hellmayr, Nov. Zool. xiv. p. 400 (Humaytha). 
Left bank: Humaytha (Hoffmanns). 
The single adult female obtained by Mr. Hoffmanns during his first expedition 
agrees perfectly with Sclater’s type and other Upper Amazonian skins in the 
British Museum. It differs from ¢amatia, of the right bank, by having the throat 
very much paler, light buff (instead of deep ochraceous or tawny). The other 
characters, viz. greater amount of rufous on forehead and coarser spotting of the 
breast, claimed by Dr. Sclater, do not prove to be constant. 
This is another instance of the Madeira Valley dividing the ranges of two 
nearly allied forms. 
A third race of the tamatia group inhabits the Pard district, N.E. Brazil. It 
has the throat fully as dark or even deeper tawny than B. ¢. tamatia, but may be 
recognized by the much larger, more crowded, black spots on the breast and sides 
’ of the belly, many of the feathers showing, besides the apical spot, a broad black 
cross-band in the middle. 
