SCIURUS. 99 
premaxille very heavy; malar broad and expanded vertically; post- 
palatal notch only a trifle posterior to last molar.’’ (Nelson.) 
Fic. 13. SciuRuS (MICROSCIURUS) BROWNI. 
No. 10404 Mus. Comp. Zool. Nat. Size 
SEY TO, LAE SPECIES OF THE SUBGENUS: 
A. Size small; tail slender, round. PAGE 
a. Upper parts dusky olivaceous, finely grizzled 
Mig yeUOWISO TUStY <2. cca. ss ft AGATE O00 
b. Upper parts tawny olive and bistre........ ..S. brownt 100 
c. Upper parts olivaceous brown, shaded with 
WEMOWISI 5 v2" wn oa sis ot eee . S. boquetensis 100 
68. alfari (Sciurus), Allen, Bull. Amer. Mus. Nat. Hist., 1895, p. 3 
ALFARO’S PIGMY SQUIRREL. 
Type locality. Jimenez, Costa Rica, Central America. 
Geogr. Distr. Northern, eastern, and southwestern Costa Rica. 
Genl. Char. Size very small; ears short, rounded; pelage soit, 
dense; tail slender, much shorter than head and body. 
Color. Upper parts and outer sides of arms, legs, hands, and feet 
dusky olivaceous, finely grizzled with yellowish rusty; top of head 
and narrow orbital ring rufous; chin, throat, breast, and inner side of 
arms pale ferrugineous shading into dark brown; middle of belly and 
inner side of thighs varving from fulvous gray to rufous; tail like 
back at base, remainder above and beneath grizzled dark reddish 
brown and black, tip black; hairs of under surface of tail reddish 
brown or chestnut, encircled with three bands. 
