124 SCIURUS. 



Measurements. Total length, 540; tail vertebrae, 280; hind foot, 

 65. Skull: average of five; basal length, 51.8; palatal length, 26.9; 

 interorbital width, 18.1; zygomatic width, 33.9; length of upper 

 molar series, 11.3. 



a. coeos (Sciurus), Nelson, Proc. Biol. Soc. Wash., xn, 1898, 



P- 155- 



aureogaster! I. Geoff., Voy. Ve"nus, Zool., Atlas, 1846, pi. 10. (nee 



Cuv.) 

 ACAPULCO SQUIRREL. 



Type locality. Acapulco, State of Guerrero, Mexico. 



Geogr. Distr. From Acapulco, State of Guerrero to Jamiltepec, 

 State of Oaxaca, Mexico, below 1,500 feet. 



Genl. Char. Nape and rump patches distinct; under parts 

 variable, white to ferrugineous. 



Color. Back, outside of arms, legs, hands, and feet grayish or 

 creamy white; nape and rump blackish rufous or chestnut; sides of 

 head and base of ears and around eyes yellowish; under parts white 

 to dark ferrugineous, varying among individuals; ears rufous; tail 

 above black washed with white, sometimes tinged with rufous, 

 beneath reddish buff to dark ferrugineous, bordered with black and 

 edged with white. 



Measurements. Total length, 520; tail vertebrae, 261; hind foot, 

 68. Skull: average of five; basal length, 50.8; palatal length, 26.5; 

 interorbital width, 19.3; zygomatic width, 33.7; length of upper 

 molar series, 10.6. 



87. griseiflavus (Macroxus), Gray, Ann. Mag. Nat. Hist., 3d Ser., 

 xx, 1867, p. 427. 



ludovicianus Tomes, Proc. Zool. Soc., 1861, p. 281. (nee. Cus- 

 tis.) 



aureigaster Allen, Mon. N. Am. Roden., 1877, p. 750. (Part.) 



affinis Alston, Proc. Zool. Soc., 1878, p. 660. 

 GUATEMALA SQUIRREL. 



Type locality. Guatemala. 



Geogr. Distr. Southeastern part of State of Chiapas, Mexico, into 

 Guatemala, 7,000-10,000 feet altitude. 



Genl. Char. Size large; color variable, usually grizzled yellowish 

 brown and gray. 



Color. Upper parts grizzled yellowish brown, occasionally washed 

 with white, this most conspicuous in winter specimens; outside of 

 arms, legs, and flanks like back; hands and feet grizzled yellow or 

 yellowish brown; sides of head and ears gray, the latter with grayish 

 basal patches; chin and throat grayish fulvous; under parts rufous 



