1915.] Allen, Review of the South American Sciuride. 261 
Guerlinguetus alphonsei alphonsei ( Thomas). 
Sciurus robertt THomas, Ann. and Mag. Nat. Hist. (7), XII, p. 468, Oct. 1903. 
Not Sciurus thaiwanensis roberti Bonhote, 1901. 
Sciurus alphonset THomas, Ann. and Mag. Nat. Hist. (7), XVIII, p. 442, Dec. 
1906. 8S. roberts Thomas, 1903, renamed. 
Type locality —— San Lourenco, near Pernambuco, Brazil; altitude 50 m. 
Geographic distribution.— Coast region at Pernambuco, Brazil; extent 
of range unknown. 
Description.— Pelage short and close, as in the estwans group. Post- 
auricular patches absent. General color effect above dark olivaceous gray, 
the hairs blackish tipped with pale fulvous, the hair tips varying in some 
specimens to ochraceous (as strong as in average estuans); underparts with 
chest and upper abdomen buff; throat, inguinal and anal regions, inside of 
limbs and outer borders of ventral surface whitish; tail above at base like 
the back, apical three fourths blackish with the tips of the hairs white, 
giving a general dark gray effect, the hairs basally annulated narrowly with 
black and buff, with a broader subapical zone of black and long white tips; 
lower surface of tail with the median area grizzled buff and black, and a 
broad subapical zone of black fringed with white; ears clothed with very 
short hairs, nearly of the color of the head and body; upper surface of feet 
with very short hairs, of the same color as the body, as in the estuans group. 
Total length, 8 specimens (type and topotypes), collector’s measure- 
ments, 353 (340-360 mm.); head and body, 181 (165-185); tail vertebre, 
178 (170-190); hind foot, s. u., 44 (42-45). : 
Skull (type), total length, 46 mm. (Thomas, /. ¢.). The only skull (a 
topotype) available for measurement at this writing 1s badly broken, and 
affords only the following: interorbital breadth, 16; nasals, 13 X 6; palatal 
length, 22.5; diastema, 11; maxillary toothrow, 8. 
Specimens examined, 9.— Brazil: San Lourenco, near Pernambuco, 9 
(Br. Mus. 8, Am. Mus. 1). 
Remarks.— In size, character of pelage, general coloration, and in all 
other features very similar to the gilvigularis phase of the estuans group, 
except that the ventral surface is much paler and the tail is washed with 
clear white instead of fulvous. 
Guerlinguetus alphonsei paraensis ((oeld:). 
Sciurus estuans paraensis GoELDI, Bol. Mus. Goeldi, IV, p. 70, Feb. 1904. 
Type locality — Para, Brazil. 
Geographic distribution.— Lower Rio Tocantins; extent of range not 
known. 
