L14 
SCIURUS., 
KEY TO THE SPECIES AND SUBSPECIES,OF THE SUBGENUS, 
_- 2 
A. Size large. Premolars, ; 
a. Above iron gray. 
a.’ Nape yellowish brown or rusty rufous...S. auretgaster 
b.’ Nape grizzled rufous or brownish. ...S. a. hypopyrrhus 
c.’ Nape yellowish or.rufous brown. ...... S. a. frumentor 
d.’ Nape grizzled yellowish brown to chestnut 
DOWEL: chris eed ad NR nee a S. p. nemoralis 
e.’ Nape yellowish brown to rusty tinged 
sigue ubglelt Nel amu eee raranervemeeeoNG. heli Lean iede ak S. p. colimensts 
f.’ Nape rusty rufous, sometimes mixed 
with black and: white... .i:...),;.. 1.2.5. Dp. effugius 
g.’ Nape fulvous or rusty brown, grizzled 
Wits DIOR <5 c-.5ee am atace tee aee aoe S. p. cervicalis 
b. Above gray mixed with brown or yellow...... S. poliopus 
c. Above pale gray and yellowish.......... S. p. hernandeszt 
d. Above blackish, grizzled with yellowish brown. ..S. nelsont 
e. Above bluish gray, grizzled.............. stn ee 6, MATEUS 
f. Above yellowish gray tinged with black. 
a.” Hears yellowish "Drow wica xaes.c + hora Ween S. colliet 
bt Ridira stir: WiOMG cata sek ns ness dcreeny S.c. nuchalts 
g. Above pale reddish, yellow, and black...... S. stnaloensis 
h. Above grizzled dark yellowish...............05. S. trust 
i. Above mixed white and black, tinged with 
VEllOwiIsh (On TULCUS. cam wore ees Oy era mahee tere S. soctalis 
j. Above grayish or creamy white..........1..5. S. s. cocos 
k. Above grizzled yellowish brown, washed 
MOUD OU WIGS es 5s Se Glee eee Sen see ee S. grisetflavis 
l. Above griggledseraycn agate see ee oo S. g. chiapensts 
m. Above grizzled gray and black, tinged with 
VOLO WISH | DYOWOi.5 sa-s scandens 4 va wee. DS. Yucatanensis 
n. Above blackish gray, suffused with buff... S. . baliolus 
Oi: ADOVE:OLROk tir oe cs a a Re tae y gee, ae S. thomast 
p. Above dark brown, mixed with grayish....... S. adolphet 
q. Above dorsal band blackish or grayish 
yellowish browil...i..5 ..50seen aan eee S. a. dorsalis 
r. Above dark: chocolate... ¢7.5.7.0 itn bee eee S. melania 
s. Above grizzled grayish brown. 
a.’ Tinged with reddish res cn wre ney cane S. boothie 
b.”. "Washed with Blache vain tee cane een S.b, belti 
t. Above grizzled yellowish gray............: S. vartegatoides 
u. Above grizzled yellowish brown, dorsal re- 
gion washed with black.................S. managuensts 
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