228 Bulletin American Museum of Natural History. [Vol. XXXIV, 
Lyon, /. c., p. 144). This specimen is still in the British Museum and was 
again compared by me with the type of griseogena and with other material 
from localities in northern Venezuela (8 specimens) and from the Merida 
district (12 specimens, including the type of Sciurus griseogena meridensis 
Thomas). My notes record that the coloration of the type of griseogena 
was found to be “exactly similar” to that of the specimens from San Este- 
ban, La Guaira, and San Julian, with which it was compared. 
Both M. griseogena and M. g. meridensis are subject to a wide range of 
individual variation in coloration, especially in the color of the ventral 
surface, which varies in specimens from the same locality from pale orange 
_yellow to deep orange red. Also the intensity and amount of the fulvous 
suffusion of the upperparts varies widely, and is of course correlated with 
the color of the underparts. 
The type of Sciurus griseogena klagesi Thomas was collected near where 
_ the large Robinson and Lyon series was taken. 
In the light of present material the griseogena group proves to be not 
sharply distinguishable on the one hand from chapmani, nor on the other 
from some of the forms of the wide-ranging hof'manni group. The difference 
in size between any of these closely related forms is very slight, while in 
coloration the chief difference is the greater extent of the black on the tip 
of the tail in the griseogena group as compared with chapmani and true 
hoffmanni. M. h. hyporrhodus of the Bogota district is a large, intermedi- 
ate, highly colored form, with nearly as much black at the tip of the tail as 
in griseogena, and leads into M. h. quindianus, which intergrades with true 
hoffmanni of western Colombia. 
Robinson and Lyon’s excellent description (J. ¢.) of griseogena was the 
first satisfactory account of the species, Gray’s original description being 
very inadequate. 
Guerlinguetus griseogena meridensis (Thomas). 
Sciurus griseogena meridensis Tuomas, Ann. and Mag. Nat. Hist. (7), VII, p. 192, 
Feb. 1901.— Auten, Bull. Amer. Mus. Nat. Hist., XXX, p. 225 (in text), Dec. 2, 
1911 (Paramo de Rosas, alt. 10,800 feet). 
Sciurus griseogena tame Osaoop, Field Mus. Nat. Hist., Zodl. Ser., X, No. 5, p. 
48, Jan. 10, 1912 (Paramo de Tama, Colombia-Venezuela boundary, alt. 6000-7000 
feet). 
L'ype locality.— Escorial, Sierra de Merida, Venezuela; altitude 2500 m. 
Geographic distribution — Venezuelan Andes and their extensions north- 
ward. : 
Description.— Similar to G. griscogena griseogena in size and general col- 
