230 Bulletin American Museum of Natural History. [Vol. XXXIV, 
or less white on the ventral surface and 11 have none. Two of the three 
topotypes of merzdensis in the British Museum also have small axillar and 
pectoral patches of pure white. In the topotype series of S. g. tame three of 
the four specimens have more or less white on the underparts, the amount 
and position of the white varying more or less with each. It is apparently 
an incipient tendency to white underparts, and occurs in many species of 
both American and Old World red-bellied squirrels, and in some species of 
South American Oryzomys and other Muride, and has little or no diagnostic 
importance, being evidently albinistic in character. 
The meridensis form of griseogena seems to be restricted to the higher 
- portions of the mountains, from the Cordillera de Merida northward, from 
probably about 3000 to 8000 feet. The Sciurus griseogena tame Osgood 
from the Paramo de Tama (6000-7000 ft.), does not seem separable from 
meridensis of Sierra de Merida. Other specimens have been examined from 
the intermediate Paramo de Rosas (from about altitude 7000 feet), near 
Guarico, and it probably occurs interruptedly at all altitudes above 3000 
feet where conditions are favorable. 
Mesosciurus chapmani (Allen). 
Sciurus cestuans (err. typ.), THomas, Journ. Trinidad Field Nat. Club, I, No. 7, 
p. 9, April, 1893. Trinidad. 
Sciurus estuans hoffmanni ALLEN and CHapMAN, Bull. Amer. Mus. Nat. Hist., 
V, pp. 209, 233, Sept. 21, 1893; <bid., IX, p. 17, Feb: 26, 1897. Caparo, Trinidad. 
Not hoffmanni of Peters, 1864. 
Sciurus chapmani AuLEN, Bull. Amer. Mus. Nat. Hist., XII, p. 16, March 4, 
1899. 
Sciurus (Guerlinguetus) estwans quebradensis AtLEN, Bull. Amer. Mus. Nat. 
Hist., XII, p. 217, Dec. 20, 1899. Quebrada Secca, Venezuela. 
Type locality — Caparo, Trinidad. 
Geographic distribution.— Island of Trinidad, Paria Peninsula, and the 
northern coast of eastern Venezuela, probably west to near Barcelona. 
Description.— Pelage short and soft. Tail rather shorter than head 
and body. Upperparts nearly uniform dull yellowish olivaceous, the hairs 
plumbeous at base, annulated subapically with pale fulvous; hind limbs 
and feet like the dorsal surface; fore limbs a little more yellow than the 
flanks; a narrow yellowish eyering; postauricular patches apparently 
absent; ears concolor with the head; underparts orange, varying from pale 
orange to reddish orange, restricted in the females to the middle of the 
abdomen, the mamme being surrounded by pale areas, more or less con- 
nected into pale lateral bands; chin and throat paler, the chin grayish buff, 
