FIELD BOOK OF MAMMALS 



Total length, males, 10.4 inches, females, 10 inches; tail 

 vertebrae, males, 3.3 inches, females, 3.1 inches; hind foot, 

 males, 1.3 inches, females, 1.24 inches. Found in "Valley 

 of the Upper Rio Grande, from El Paso, in extreme western 

 Texas, and Juarez, Chihuahua (on the Mexican side of the 

 river opposite El Paso), north to Las Cruces, New Mexico, 

 and west to Deming." (Merriam) 



Padre Island Pocket Gopher. — Geomys personatiis personatus 

 True. 

 Large and pale; tail long, scantily haired on basal half, 

 nearly naked toward tip. Upperparts dull, pale brown, 

 with some black-tipped hairs; dusky on top of head; under- 

 parts whitish. Total length, males, 12.6 inches, females, 

 1 1.7 inches; tail vertebrae, males 4.5 inches, females, 4 

 inches; hind foot, males, 1.6 inches, females, 1.44 inches. 

 Found in "The Tamaulipan fauna of Texas, comprising 

 Padre Island and the adjacent mainland southwesterly to 

 Carrizo on the Rio Grande." (Merriam) 



Nueces Pocket Gopher. — Geomys personatus fallax MernsLm. 

 Smaller than typical personatus, darker, and tail shorter 

 and more nearly naked. ^ Upperparts as in typical person- 

 atus; underparts white, with irregular, darker areas. Total 

 length, males, 10.5 inches, females, 9.5 inches; tail verte- 

 brae, males, 3.5 inches, females, 3 inches; hind foot, males, 

 1.36 inches, females, 1.24 inches. Found on "South shore 

 of Nueces Bay and lower Nueces River, Texas. ' ' (Merriam) 



Genus Cratogeomys 



Very much like Geomys; upper incisors with single, median 

 groove. 



Chestnut-faced Pocket Gopher. — Cratogeomys castanops cas- 

 tanops (Baird). 

 Size large. Yellowish brown above, mixed with black- 

 tipped hairs; underparts buffy; tip of tail blackish; feet 

 grayish. Total length, 10.5 inches; tail vertebrae, 2.6 

 inches; hind foot, 1.5 inches. Found from southeastern 

 Colorado, eastern New Mexico, and western Oklahoma 

 south through western Texas into Mexico. 



******* 

 The Pocket Gophers of the genus Geomys and Cratogeomys 

 do not differ very much in their general habits from Thomomys 

 (see account of habits given for this genus, page 288). 



These Pocket Gophers are found over practically all of the 

 Mississippi Valley and may or may not prove troublesome to 

 man, depending upon the locality. Some species are very 

 destructive to fruit trees or to other cultivated vegetation; 

 other species live in regions where the soil is too poor for cul- 



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