in the Collection of the British Museum. 431 
Young similar, but hairs longer and underside redder ; hairs 
red to the base, without a grey tip or subterminal ring. 
Hab. Republic of Ecuador (Fraser). B.M. 
The adult male has a small tuft of opaque white hairs on 
each side of the nape, and a similar tuft on the middle of the 
right side of the body; but, as there is no similar spot on the 
left side, I am inclined to believe they are an accidental indivi- 
dual variation. | 
26. Macroxus tephrogaster. 
Fur soft, rather short, close, dark olive, very minutely punc- 
tulated with yellow; middle of the back blacker; hairs lead- 
coloured, with a yellow and black ring and a yellow tip; cheeks 
pale; chin, throat, underside of body, and inner sides of legs 
whitish grey; hairs lead-coloured, with white tips; tuft at back 
of ears yellow grey: tail black, whitish-washed, underside red- 
dish, with a black border; hairs yellowish, with a very broad 
band and white tip. | 
Hab. Mexico (M. Sallé): B.M. Guatemala (O. Salvin): B.M. 
Bogota (H. E. Strickland): B.M. Honduras (Dyson) : B.M. 
27. Macrozxus teniurus. 
Fur dark olive, closely and minutely punctulated with reddish 
yellow, the middle of the back rather blacker ; the sides of neck 
and body yellower ; hairs black, with minute yellow tips ; cheeks 
yellow; chin, upper part of throat; and inner sides of the 
the limbs grey; hairs black, with white tips; hinder part of 
throat, chest, and belly grey, red-washed: tail depressed, ex- 
panded, black, white-washed; under surface red brown, with 
black margins and grey edges; hairs reddish yellow, with two 
or three indistinct narrow bands, a broad subterminal black 
band, and a grey tip. : 
Hab. Guatemala (O. Salvin). B.M. 
28. Macroxus irroratus. 
Fur olive, closely, uniformly, and minutely punctulated with 
yellow ; hairs short, close, lead-coloured at the base, black above, 
with a yellow tip; nose, cheeks, chin, throat, belly, and inner 
sides of the limbs yellow or reddish yellow ; hairs lead-coloured, 
with yellow tips; ear-tuft small, reddish : tail depressed, black, 
washed with reddish yellow; hairs rather long, yellow brown, 
with two narrow inferior and a broad subterminal black band, 
and a reddish-yellow tip. 
Hab. Brazil, Upper Ucayali (E. Bartlett). B.M. 
Like M. estuans, but rather larger, cheeks redder, tail broader, 
