28 FreELD MusEuM oF NaTurRAL History — Zo6.oey, Vou. X. 
and in specimens in slightly worn pelage is scarcely distinguishable 
from the grizzled central part of the tail, especially when viewed from 
the under side. General color of upperparts mixed “peppery,” 
clay color and blackish; orbital ring and sides of nose clay color to 
ochraceous; chest and belly clear ochraceous rufous; upper side of 
tail from a point about 50 mm. from its base to the black of the tip 
mostly clear ochraceous instead of hazel or ferruginous as in chap- 
mani; tip of tail black with few ochraceous hairs intermixed and a 
few of the black hairs faintly tipped with ochraceous. Skull practi- 
cally as in chapmant, 
Measurements. Type (dry skin): Total length 330; head and 
body 165; tail vertebre 165; hind foot (c. u.) 45. 
Remarks. The heavy black tip of the tail is the principal character 
distinguishing this form from S. chapmani. A complete revision 
of this group of squirrels with ample material is necessary before it 
will be possible to decide how many of the various described forms 
should be regarded as species and how many as subspecies. 
Dasyprocta variegata colombiana Bangs. 
One specimen, Orope, Zulia, Venezuela; collected by N. Dear- 
born. Comparison of this and other specimens of the same form 
with those belonging to allied forms from Panama to Peru shows 
sufficiently complete intergradation to convince that at least colom- 
biana and isthmica should be regarded as subspecies of variegata. 
Hydrocherus capybara Linnzus. 
One specimen (skull only), Lake Valencia, Venezuela; collected 
by N. Dearborn. 
Sylvilagus cumanicus Thomas. 
One specimen, Maracay, Venezuela; collected by J. F. Ferry. 
This is by no means typical, being considerably larger and more 
rufescent than the type of cumanicus, It is also decidedly larger than 
S. orinoci but agrees closely with that species in color. Its external 
resemblance to the insular form margarite also is marked. Without 
a series of typical cumantcus, however, it does not seem safe to sepa- 
rate it from that species. Possibly it should be regarded as inter- 
mediate between orinoci and superciliaris, since it agrees in color with 
one and in size with the other. 
Sylvilagus nigronuchalis (Hartert). 
Three specimens, Aruba Island, collected by J. F. Ferry; one 
specimen, Curagao, collected by N. Dearborn. The single adult 
