8 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
coast opposite the northwestern tip of Trinidad. The range of this 
form continues west across the arid coast and grades into the slightly 
larger and darker griseogena. 
Sciurus (Guerlinguetus) quebradensis Allen (1899, p. 217). Described 
from Quebrada Seca, east of Cariaco, at the southern base of the 
Peninsula de Araya, in northern Venezuela. Allen (1915, p. 230) 
has already treated quebradensis as a synonym of chapman. ‘This is 
rather surprising in view of that author’s tendency to split subspecies 
into genera and subgenera. The locality records of quebradensis 
are of interest. They are evidence of the continuity of the range of 
the species granatensis across the northern coast of Venezuela into 
Trinidad and indicate that the ranges of chapmani and griseogena 
may be contiguous. 
Sciurus nesaeus G. M. Allen (1902, p. 93). A topotype at hand 
from Margarita Island suggests that this squirrel, like chapman, is 
an insular offshoot of the common species. It appears to have 
differentiated more from the mainland stock than has chapmani. 
It may be an arbitrary procedure to regard nesacus as a subspecies of 
granatensis, but in the absence of evidence to the contrary its relation- 
ship to the continental form is thus best expressed. Allen (1915, 
p. 233) spoke of nesaeus as being ‘“‘intermediate between its two 
mainland neighbors, M. griseogena and M. chapmant.” 
Sciurus tobagensis Osgood (1910, p. 27). From the island of Tobago, 
northeast of Trinidad. This form has been considered a race of 
chapmani (=granatensis) by Allen (1915, p. 232). Three topotypes 
at hand confirm its near relationship to chapmani as well as its specific 
identity with granatensis. The squirrels of the islands of Trinidad, 
Margarita, and Tobago are all very closely related and all are griseogena- 
like in appearance. The differences which separate them from each 
other and from the mainland griseogena are nowhere as great as the 
differences between the coastal Colombian and Ecuadorian forms 
and their high Andean relatives. 
Notosciurus rhoadsi Allen (1914, p. 585, fig. 1). The genotype, and 
only specimen, is an immature individual of “‘hoffmanni”’ with the 
furred portions of the ankles left tucked over the soles of the hind 
feet through carelessness by the preparator. This condition was 
described and figured by Allen as the principal generic character. 
The specimen was brought from the Pagma Forest, Ecuador, by 
Samuel N. Rhoads and first recorded by Stone (1914, p. 14) as Sciurus 
irroratus Gray. It is quite obviously the same as the other Rhoads 
squirrels from Mount Pichincha, Ecuador, which Stone described as 
Sciurus hoffmanni séderstrémi. 
Guerlinguetus griseimembra Allen (1914, p. 589). Examination of 
the original series, including the type, shows that this small highland 
