1915.] Allen, Review of the South American Sciuride. 201 
foot (with claws), 43 (41-45). Skull (2 adult topotypes), total length, 41, 
42; zygomatic breadth, 24, 25; interorbital breadth, 13.8 (each); breadth of 
braincase, 20 (each); length of nasals, 11 (each); diastema, 9, 10; maxillary 
toothrow, 6.6, 7. (See also Table II, p. 208.) 
Specimens examined, 13.— Colombia: Vicinity of Bogoté, 8 (Br. Mus., 
6; Am. Mus. 2); Fusugasugé, 3; La Candela and Andalucia, each 1 (Am. 
Mus.). 
Remarks.— L. pucheranti pucheranit was described by Pucheran in 1842, 
under the preoccupied name Sciwrus rufoniger, and renamed pucheranit 
by Fitzinger in 1867. Its relationships have since been misinterpreted by 
various authors, owing to the defective original description, which made no 
reference to the dentition and gave no measurements, and to the absence 
of specimens from Bogota for a long period that agreed withit. The validity 
of the species seems to have been recognized some years since by Thomas, 
as specimens received at the British Museum from the Bogota district in 
1899 are labelled S. pucheranit. 
The specimens from’ Fusugasugé (6000 to 8000 ft.), a short distance 
southwest of Bogota, agree very closely in size and coloration with those 
from Bogota, and differ mainly from those of the Salento region in the paler 
coloration of the ventral surface. One specimen each from La Candela and 
Andalucia, near the southern end of the Eastern Andes, seem also to belong 
here. 
In my recent paper on Microsciurus (1. ¢., pp. 153, 158) I referred Sciurus 
rufoniger Pucheran to Microsciurus, and suggested its possible reference to 
M. mimulus Thomas, mainly on the basis of Alston’s apparent representa- 
tion that it had two upper premolars.! I have since been informed by Mr. 
Thomas (in litt., Feb. 9, 1914) that all the squirrels from Bogota that have 
been referred to Microsciurus are really members of the pucherani group. 
As soon as I took up the pucheranw group for critical study I recognized 
that two specimens recently received at the American Museum from Bo- 
got4, and others from nearby localities in the Eastern Andes, conformed 
perfectly with Pucheran’s description of his Scowrus rufonager. 3 
Sciurus chrysuros Pucheran is not at present satisfactorily identifiable. 
It was described at the same time as S. rufonzger, it following that species 
on the same page, and as coming from the same locality,— “Habite la 
Colombie (Santa-Fe de Bogota).” It is described as being intermediate 
between “le Guerlinguet et l’Ecurcuil nain” (Sciurus estuans and S. pusil- 
lus auct.), without the median dark band on the back of his S. rufonzger, 
and the tail “roux doré” instead of fringed with white. If the tips of the 
1In 1878 Alston sent me one of the types of: his (not Pucheran’s) Sciurus rufoniger, on 
the label of which was written, ‘‘Compared with Pucheran’s typein Paris Museum. E.R. A. 
April, 1878.’ (Cf. Allen, Bull. U. S. Geolog. Survey, IV, No. 4, p. 905, Dec. 11, 187 8.) 
