104 SCIURUS. 
d. Upper parts mixed yellow ferrugineous and PAGE 
blackish: brow? 1 Aeadcs eae ee ere S.v. morulus 105 
ceestwans hoffmanni (Sciurus), Peters, Monatsb. K. Preuss. Akad. 
Wiss. Berl., 1863, p. 654. 
xanthotus Gray, Ann. Mag. Nat. Hist., 3d Ser., xx, 1867, p. 429. 
griseogena Gray, Ann. Mag. Nat. Hist., 3d Ser., xx, 1867, p. 430. 
(Part. Costa Rica.) 
rufoniger Allen, Mon. N. Am. Rodent., 1877, p. 757-763. (Part. 
Costa Rica.) 
griseogenys Alston, Proc. Zodl. Soc., 1878, p. 667. (Part. Costa 
Rica, Veragua, Panama.) 
HOFFMAN’S SQUIRREL. 
Type locality. Costa Rica, Central America. 
Geogr. Distr. Costa Rica south to upper Cauca River, Colombia. 
Genl. Char. Similar to S. @stuans in size, but darker; tail broad, flat. 
Color. Upper parts grizzled rusty brown, sometimes blackish on 
top of head and median line of back; orbital ring dark buff; chin and 
throat yellowish buff; under parts rusty buff to deep ferrugineous, 
outside of arms and legs like back, inner side like under parts; hands 
and feet similar to back, but more inclined to yellowish; tail above 
black, washed with ferrugineous, beneath grizzled black and yellowish 
brown, and broadly edged with ferrugineous; ears thinly haired; 
darker than head, basal patch small, dull fulvous. 
Measurements. Total average length, 426.6; tail vertebre, 187; 
hind foot, 54.3. Skull: average of five; basal length, 43.2; palatal 
length, 23.3; interorbital width, 17; zygomatic width, 31.3; length of 
upper molar series, 9. 
estuans chiriquensis (Sciturus), Bangs, Bull. Mus. Comp. Zodl., 
GO GIG aoa) 0), Os 
CHIRIQUI SQUIRREL. 
Type locality. Divala, Chiriqui, Panama. 
Genl. Char. Very similar to S. @. hofjmannt; under parts paler. 
Color. ‘‘Upper parts finely mixed blackish brown and tawny, 
the tawny color predominating on sides, the dark brown color along 
middle of back; orbital ring, back of ear, and a small spot just behind 
ear clear tawny; under parts tawny, becoming yellower, about raw 
sienna, on under side of neck and head, and often the breast simi- 
larly colored; tail much the same as back, but with the tawny annu- 
lations wider; deeply fringed along sides with clear tawny, under side 
darker than upper.”’ 
Measurements. ‘‘Type. Total length, 400; tail vertebre, 190; 
hind foot, 52; ear, 20.’’ Skull: basal length, 46.2; occipito-nasal 
