( 328 ) 
This bird stands somewhat between D. r. rufigula, from the Guianas, etc., and 
D. r. devillei, from Upper Amazonia. It agrees with the latter in the pale greyish 
colour of the bill, and in having the white markings below restricted to the fore- 
neck ; however, the ground-colour of the lower parts is pale brown (not tinged with 
ochraceous), the throat shows half-concealed white spots, and the hindneck as well 
as the sides of the neck are streaked with white. In all these. points it resembles 
D.r. rujigula, bat the white markings are narrower, and those on the hindneck 
have no or scarcely any black lateral edges. 
On the left bank of the Rio Madeira another form takes its place :-— 
[189. Dendrexetastes rufigula devillei (Lafr.). 
Dendrocolaptes Devillei Lafresnaye, Rey. Mag. Zool. (2) ii. p. 102 (1850.—Sarayagu, Eastern 
Peru). 
Dendrexetastes devillei Heilmayr, Nov. Zool, xiv. 1907, p. 366 (Humaytha). 
Left bank of the Rio Madeira: Humaytha (Hoffmanns), thence through 
Western Brazil (Bom Lugar, Rio Purtis*) to Eastern and Northern Pern 
(Sarayacu, Iquitos, Samiria, etc.).] 
[Having lately examined specimens of the three forms of Dendrexetastes, 1 
think a few words about their distinguishing characters may be welcome to 
ornithologists. 
(a) D. rufigula rufigula (Less.). 
Syn. Dendrocolaptes Temminckii Lafresnaye, Rev. Mag. Zool. (2) iii. p. 145. pl. iv. (March 1851.— 
‘Santa Fé de Bogoté”—errore !), 
Dendrexetastes capitoides Eyton, Contrib. to Ornith. 1851. p. 76 (autumn 1851.—no locality). 
Hab. French Guiana: Cayenne (Lesson, etc.), Ouanary (Geay); Surinam : 
near Paramaribo (Chunkoo; two specimens in Tring Museum); British Guiana: 
Mines District (two specimens in Tring Museum). North Brazil: Barra do Rio 
Negro = Mandos (Natterer). 
Characters. This form is characterized by having the foreneck and chest 
thickly covered with large, oval, whitish spots, bordered by a very distinct black 
line; the chin only is uniform rusty buff, while the throat shows half-concealed 
white shaft-streaks ; nape and sides of neck with conspicuous, slightly pointed, 
whitish stripes, more or less distinctly edged laterally with black ; ground-colour 
of lower parts pale brown with a faint ochreous tinge. Upper mandible dark horn- 
brown ; lower one yellowish grey, darker at base. 
Obs. Specimens from British Guiana and Manaos are practically identical. 
Two from Surinam differ by having slight dusky cross-lines in the middle of the 
abdomen and on the under tail-coverts. ‘fhe sides of the head, including superciliary 
and temporal regions, are uniform earthy brown in D. r. rufigula, though in one 
specimen each from Surinam and British Guiana a few narrow whitish lines are to 
be noticed along the upper margin of the ear-coverts. 
Wing. Tail. Bill. 
1, 3g ad., Paramaribo : ; : , 306 110 32 mm. 
— Imm, e ‘ ; : . 100 100 (moulting) 31 ” 
3,4. Adults, Mines District, British Guiana 105,109 108, 112 30,32 sy, 
5, g ad., Barra do Rio Negro (Natterer) . 105 114 damaged ,, 
* Snethlage, Journ. f. Orn, 1908. p. 14, 
