20 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
leave no doubt as to the identity of this squirrel. The actual type 
agrees so well with the specimens from La Gloria as to make it seem 
that it had originally been taken in the same area. Thus, Allen’s 
surmise (1904, p. 434) regarding the probable habitat of variabilis 
appears to be confirmed. 
In the Paris Museum there are but two specimens of the three types 
described by Geoffroy. Both are mounted on wooden stands and 
are listed by Rode (1943, p. 382) in his catalog of the types of mammals 
in the Paris Museum. The cotype, a female, is paler and lacks the 
black along the back and on the thighs noted in the lectotype. 
Unless this difference is a result of fading it is possible that this speci- 
men was taken at a stopping point, along the Magdalena, other than 
where the lectotype was discovered. It is questionably identified 
with variabilis. The following description of the series of three 
specimens from La Gloria is completely representative of the lectotype: 
La Guorta (2 females, 1 male): Dorsal surface from crown to basal 
fourth of tail, mars orange to burnt sienna mixed with black; gray 
crinkly bases of hairs of anterior half of back followed by a broad 
band of black, a narrower band of mars orange, tips black; posterior 
half of back with more black, the hairs entirely black or with one or 
two narrow orange rings between broad black bands; in one of the 
females rump and basal fourth of tail appear entirely black. Sides 
of body and limbs with less black than upper parts, especially at tips 
of hairs. White underparts sharply defined by a lateral line of mars 
orange; white of ventrum extends along inner side of forelimbs to 
elbows and on inner sides of thighs. Tail above orange-rufous to 
mars orange, the basal fourth nearly entirely black; undersurface 
mixed orange and black basally in all specimens, terminally nearly 
uniformly orange in the male, mixed black and orange in one of the 
females, and bicolor, the hairs with paler basal portions, in the other 
female. 
Aguacuica (2 females): Like the specimens from La Gloria. Me- 
dian dorsal band wide on posterior half and extends over crown and 
proximal one-third of tail; lateral line distinct; fore and hind feet 
reddish. 
Remarks.—Some knowledge of the itinerary of Plée would be of 
considerable interest. We know little of his explorations in tropical 
America beyond the reference to his name as the collector of certain 
animals. As it had already been generally conceded by authors (see 
Allen, 1904, p. 435) that the squirrel in question, as well as Ateles 
hybridus, was collected by Plée somewhere along the Rio Magdalena, 
the writer attempted to secure examples of these during the course of 
his field work in northern Colombia. Representatives of Ateles hy- 
bridus were taken at four localities. Kellogg and Goldman, in their 
revision of the spider monkeys (1944, p. 25), found that the animal 
