1915.] Allen, Review of the South American Sciuride. gal 
Remarks.— As indicated above, chiriquensis may be regarded as a rather 
shghtly differentiated form of hoffmanni, as the latter is here restricted, 
confined to the humid tropical lowlands of Costa Rica and Chiriqui, char- 
acterized mainly by thinner and more hispid pelage and the slightly more 
rufous tone of the coloration. The characters given by Bangs, based on 
Divala (Chiriqui) specimens, are the reverse of the acutal conditions, the 
words “more” and “less” in the expressions “more olivaceous”’ and “less 
brick-red”” having been apparently accidentally transposed. The name, 
however, may be retained for the lowland form, in contradistinction from 
the form of the higher elevations of the interior, to which it seems convenient 
to restrict the name hoffmannz, so far as the Central American representative 
of the hoffmanni group are concerned. 
Mesosciurus hoffmanni manavi (Allen). 
Guerlinguetus hoffmannit manavt ALLEN, Bull. Amer. Mus. Nat. Hist., XX XIII, 
p. 589, Oct. 8, 1914. 
Type locality. Manavi, Rio de Oro, Ecuador. 
Geographic distribution.— Coast region of western Ecuador. 
Description.— “Similar to G. hoffmanni in size and general coloration, 
but with the proximal half or two thirds of the tail below nearly black, the 
hairs basally black narrowly ringed with fulvous giving a slightly grizzled 
effect, followed by a broad zone of black and a slight tipping of reddish 
orange; apical half or third of the tail below black slightly grizzled with 
fulvous or orange, the hairs broadly tipped with orange red; whole upper 
surface of the tail grizzled black and orange red, the surface color of the 
apical third almost wholly orange red. 
“Total length (type), 410 mm.; head and body, 230; tail vertebree, 
180; hind foot (e. u. in dry skin), 52. Skull, total length, 52; zygomatic 
breadth, 31; interorbital breadth, 16; breadth of braincase, 24; length of 
nasals, 15; diastema, 13; maxillary toothrow, 8.8.’’ — Allen, 1. c. 
Specimens examined, 12.— Ecuador: Manav, 5; Esmeraldas, 3, Na- 
rinjo, 4 (Am. Mus.). 
Remarks.— Differs from true hoffmanni of the elevated interior of Ecua- 
dor and the Western Andes in Colombia in the underparts being redder 
and the tail much blacker, especially on the under surface. 
