1915.| Allen, Review of the South American Sciuride. 241 
Mesosciurus gerrardi milleri (Allen). 
Plate VELE Pages 9-10; Plate XII, Boge. 17, 18, 
Sciurus millert ALLEN, Bull. Amer. Mus. Nat. Hist., XX XJ, p. 91, April 19, 1912. 
Type locality.— Cocal, western slope of the Western Andes, Colombia; 
altitude 4000 feet. 
Geographic distribution The known range extends from Cocal south- 
west along the western slope of the southern part of the Western Andes to 
Ricuarte (altitude 5000 feet). | 
Description.— Similar to M. gerrardi gerrardi in general coloration, but 
rather larger, with the base of the tail, both above and below, and the outer 
surface of the hind legs and feet black. ? 
Typical gerrardi has the under surface of the base of the tail ochraceous 
or orange, the hind legs red like the sides of the body, and the upper surface 
of the hind feet with the hairs tipped with red. Typical mllerz has the 
black of the lower back extending laterally over the thighs'and outer surface 
of the hind legs; the upper surface of the hind feet is deep black, and the 
under surface of the proximal third of the tail is wholly black to the base. 
Unfortunately the type of milleri! is not typical of the subspecies to 
which the name is applied, and might be referred to true gerrardi as an 
individual variant, were it not that all of the 8 specimens from Barbacoas 
and Ricaurte, about 100 miles southwest of Cocal have all the distinctive 
features of the type of milleri greatly intensified. If the type could be now 
chosen one of the Ricaurte specimens would be selected, in which the fore- 
limbs and sides of the body are redder, the base of the tail and the hind feet 
blacker. | 
Three adult males from Barbacoas, total length, 457 (450-470); head 
and body, 247 (240-250); tail vertebree, 210 (200-230); hind foot, 59 (58- 
60). Adults from Ricuarte agree in measurements with the Barbacoas 
specimens. 
Three adult male skulls (1 from Ricuarte, 2 from Barbacoas), all the 
adults that are available for measurement: Total length, 56.5 (56-57); 
zygomatic breadth, 33.6 (33-34); interorbital breadth, 18.5 (17.5-19.5) ; 
breadth of braincase, 25.3 (25-25.5); length of nasals, 18.6 (18.5-18.6) ; 
maxillary toothrow, 9.3 (9.2-9.5). 
BES ane gd pao shee et a Sls A IE Ae hehe net 
1 The collector’s measurements of the type given in the original description should be cor- 
rected to read: Total length, 416: head and body, 223; tail vertebrz, 193, the collector, it has 
since been learned, having measured the tail to the tip of the hairs instead of to the end of 
the vertebree. 
