104 SCIURUS. 



d. Upper parts mixed yellow ferrugineous and PAGE 



blackish brown 5. v. morulus 105 



(estuans hoffrtianni (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. Zool. 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. (estuans 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 vertebrae, 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 (Sciurus), Bangs, Bull. Mus. Comp. Zool., 



XXXIX, 1902, p. 22. 



CHIRIQUI SQUIRREL. 



Type locality. Divala, Chiriqui, Panama. 



Genl. Char. Very similar to 5. &. hoffmanni; 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 vertebrae, 190; 

 hind foot, 52; ear, 20." Skull: basal length, 46.2; occipito-nasal 



