96 NELSON 



Specimens examined. — Thirty-three : from El Sal to (southwest of 

 Durango City), Durango ; near Guadalupe y Calvo, Bavispe River, 

 and Sierra Madre near Arizona border, Chihuahua ; Sierra de Choix, 

 northeastern Sinaloa, Mexico ; and the Chiricahua Mountains, Arizona. 



SCIURUS ARIZONENSIS HUACHUCA Allen. 

 Huachuca Squirrel. 



Sciurus arizone7tsis huachuca ^lA.Y.'H, Bull. Am. Mus. Nat. Hist., N. Y., vi, 

 p. 349, Dec. 7, 1894; Ibid., vii, p. 245, 1895. 



Tyfe locality. — Huachuca Mountains, southern Arizona. Type 

 no. f|-f^ American Museum of Natural History, New York. 



Distribtition. — Pine and oak forests of Transition zone, in north- 

 eastern Sonora, Mexico, and Huachuca Mountains, southern Arizona. 



Characters. — Generally similar to S. arizonensis but with a broad 

 band of gray over back of neck and shoulders, separating the median 

 grizzled yellowish or pale rusty area into a narrow patch on crown 

 and ears and a larger one on lumbar region and rump. Pelage full 

 and soft; tail long and bushy. Teats: p- y a- f i- y- 



Color. — May specimens from Ft. Huachuca, Arizona : upperparts, 

 including top of nose and base of tail, pale grizzled gray with rusty 

 yellow wash on back of crown, lumbar region and rump ; sides of 

 neck, flanks, and outside of hind legs somewhat paler than top of 

 shoulders ; fore feet and outside of legs grizzled gi-ayish white, some- 

 times pale gray ; hind feet pale grizzled gray ; ring around eye whitish, 

 or slightly buffy; sides of head whitish gray often with postocular 

 yellowish brown suffusion ; ears dingy grayish or dull yellowish, some- 

 times with small patch of dull gray or rusty yellow behind base ; under- 

 parts white ; tail above black washed with white, heaviest along 

 border ; below, broad median area grizzled rusty, dull orange yellow 

 or yellowish brown, with heavy black border and broad white edge. 

 Hairs on back black with white tips and broad yellow sub-basal or 

 basal rings, or with subterminal buffy yellow rings, mixed with other 

 hairs wholly black. Winter pelage similar to that of summer but a 

 little grayer on sides of body and outside of legs and feet ; ears more 

 thickly haired and dull rusty with basal patches of same color ; white 

 on tail more distinct. 



Variation. — The type of ktiackuca has a dull yellowish wash on 

 crown, and the ears and basal ear patches are rusty ; the rest of the 

 upperparts are grizzled gray, darker along middle of back where an 

 intermixture of rusty forms a small irregular patch ; the flanks, outside 



