236 Bulletin American Museum of Natural History. [Vol. XXXIV, 
underparts are almost wholly grayish white, with a tendency to a pale buffy 
wash over the middle of the belly; in 7 others the underparts are washed 
with pale orange yellow with the throat and chest mostly white; in one the 
whole undersurface is rich orange red. The specimen selected as type is of 
the medium phase of coloration. It may be added that the white on the 
underparts is plainly not albinistic, as in many normally red-bellied squirrels, 
the white being limited to the apical portion of the hairs, the basal portion 
being plumbeous. 
“The nearest relative of M. candelensis is M. griseomembra, adjoining it 
to the northward in the Eastern Andes, which is similar in size and cranial 
characters, but radically different in coloration. In candelensis the legs and 
feet are not gray but like the adjoining parts of the body; the coloration of 
the upperparts is many shades darker, the yellow tips to the hairs being 
much shorter, and the tail is superficially dark red instead of pale ochraceous. 
“Tt is interesting to note, in respect to its nearest geographical allies, 
that the range of M. griseimembra nearly joins it to the northeastward, 
while typical hoffmannz is abundant 50 miles to the westward at Almaguer 
and La Sierra, and also northward in the Western Andes, with which, 
however, candelensis has no near relationship.”’ — Allen, I. c. 
Subgenus Histriosciurus subgen. nov.! 
Mesosciurus gerrardi gerrardi (Gray). 
| Plate WITE igs. 4,5; Place XIE, Figs. 13) 14. 
Sciurus gerrardi Gray, Proc. Zool. Soc. London, 1861, p. 92, pl. xvi (“New Gre- 
nada).’’— AtLEN, Monogr. North Amer. Rodentia, 1877, p. 766; Bull. Amer. Mus. 
Nat. Hist., XXXT, p. 90, April 19, 1912 (Rio San Jorge, Colombia). 
Macroxus gerrardit Gray, Ann. and Mag. Nat. Hist. (8), XX, 1867, p. 430. 
Same as Sciurus gerrardi Gray, 1861. 
Sciurus variabilis ALston, Proc. Zool. Soc. London, 1878, p. 665, part, not of Is. 
Geoffroy.— Auten, Bull. U. 8. Geol. and Geogr. Survey Terr. (Hayden), IV, No. 4, 
‘p. 884, Dec. 11, 1878, part, not of Is. Geoffroy. 
Type locality.— “ New Grenada”’; exact locality not known, but doubt- 
less Antioqua, Colombia (probably near Medellin). Type and topotype 
in British Museum. [See Addenda, p. 308.] 
Geographic distribution.— Coast region of western Colombia. 
Description.— Pelage short, coarse and stiff with very little underfur. 
Median upperparts, from top of head to base of tail (including its extreme 
Type Sciurus gerrardi Gray. 
