1915.] Allen, Review of the South American Sciuride. 275 
tion, having much more black in the tail instead of less. In addition to 
this is the marked difference in size, zamore being much smaller than any 
other subspecies of the ignaventris group. The type locality of zamore is 
250 to 300 miles from any known locality of cocalis and in a quite different 
environment, Either zamore is a small form of cocalis, or the type must be 
- construed as a dwarf, and its color differentiation as an individual aberra- 
tion, although it has the appearance of being in every way a normal 
adult.’’—~ Allen, J. c. | 
- Urosciurus pyrrhonotus pyrrhonotus (Wagner). 
Plate XI, Figs. 1-3. 
Sciurus pyrrhonotus WAGNER (ex Natterer MS.), Wiegmann’s Arch. f. Naturg., 
1842, I, p. 260; Abhandl. math.-phys. Cl. K.-B. Akad. Wissen. Miinchen, V, 1850, 
p. 277.— PEuzELN, Verhandl. K.-K. zool.-bot. Gesells. Wien, XX XIII, Beiheft, 
1883, p. 60. | 
Type locality Borba, Brazil, near mouth of Rio Madeira. 
Geographic distribution.— Interior of Brazil, from mouth of Rio Madeira 
southwestward. Exact range unknown. 
Description.— Upperparts rust red, paler and more orange red anteriorly, 
passing into dark fiery red posteriorly; top of head darker; ears red; under- 
parts whitish yellow or ochraceous yellow, lighter on throat and chest, or 
irregularly patched with white; fore limbs and feet bright red, hind feet 
orange red; tail above with the basal fourth black, rest of upper surface 
heavily washed with orange red, the hairs black for their basal half or 
two thirds, black showing more or less through the red tips; under surface 
of tail black for the basal third, beyond which the median area is black 
broadly edged with red, the black decreasing and the red increasing in 
amount toward the tip, the terminal hairs being black for the basal two 
thirds and tipped with red. 
Total length (1 specimen, o ad., fan Calama, on Rio Madeira at 
mouth of Rio Gy-Paranaé), 540 mm.; head and body, 270; tail vertebre, 
970; hind teot, ¢. u. 72- 
Skull (same specimen), total length, 65; zygomatic breadth, 37; inter- 
orbital breadth, 22; postorbital breadth, 19; breadth of braincase, 23.6; 
nasals, 18 X 8; diastema, 18; maxillary toothrow, 10. : 
Specimens examined, 1.— Brazil: Calama, Rio Madeira at mouth of 
Rio Gy-Parand (Am. Mus., Roosevelt Exped.). 
Remarks.— The only specimen available for examination was taken on 
the Lower Rio Madeira not far from the type locality. 
