GROUND SQUIRREL 



Dolans Spring Ground Squirrel. — Citellus neglectus (Merriam). 

 Resembling typical tereticaudus but smaller and with shorter 

 hind feet and tail. Upperparts grizzled grayish brown; 

 underparts white; tail above and below like back, bordered 

 with black. Total length, 8 inches; tail vertebras, 3 inches; 

 hind foot, 1.3 inches. Found at Dolans Spring, Mohave 

 County, Arizona. 



Rio Grande Ground Squirrel. — Citellus mexicanus parvidens 

 (Mearns). Plate XXIII. 

 This Ground Squirrel is more or less intermediate in charac- 

 ters between the spilosoma group and the tridecemlineatus 

 group; color pattern striped and spotted somewhat as in 

 tridecemlineatus; tail fairly long and moderately bushy ; size 

 a trifle larger than tridecemlineatus ; pelage rather coarse 

 and harsh as in spilosoma. Upperparts marked from nape 

 to base of tail with nine longitudinal stripes of whitish upon 

 a ground color of pale yellowish brown to olivaceous, these 

 white stripes more a series of broken dots than a well-defined 

 continuous streak; top of head grizzled yellowish, grayish 

 and dusky; ears small; hands and feet pale yellowish; under- 

 parts whitish to yellowish white; tail above, grizzled gray 

 and black with faint wash of brown near base, below, pale 

 yellowish mixed with black and grayish: iris hazel. Total 

 length, 12.5 inches; tail vertebras, 5 inches; hind foot, 1.7 

 inches. Found in southwestern Texas, in desert areas. 



Tridecemlineatus Group 



Thirteen-striped Ground Squirrel; Thirteen-lined Ground 

 Squirrel; Striped Prairie Squirrel; Striped Gopher. — 



Citellus tridecemlineatus tridecemlineatus (Mitchill). 

 A small to medium-sized Ground Squirrel with conspicu- 

 ously striped and spotted color pattern. Ears very small; 

 body slender rather than robust; tail comparatively short; 

 less than half of total length, and only narrowly bushy, 

 upperparts heavily marked with many alternate longi- 

 tudinal stripes of dark brown (with slight chestnut tinge) 

 and whitish, the dark stripes with central rows of whitish 

 spots; stripes on neck to shoulders solid and unbroken by 

 spotting; end of nose yellowish brown; top of head indis- 

 tinctly striped; sides of neck, lower sides of body, forelimbs 

 and underparts yellowish; pelage of underparts dusky at 

 base; tail above, mixed black and buffy, below, buffy mixed 

 with black. Total length, 11 inches; tail vertebrse, 4.3 

 inches; hind foot, 1.4 inches. Found from southern Illinois 

 and northern Missouri to northwestern Ohio, southern 

 Michigan and central Wisconsin and west and northwest 

 to North Dakota and Saskatchewan. Plates XXI and 

 XXIII. 



