• MILLER AND REHN : NORTH AMERICAN MAMMALS. 149 



Type locality. — Unknown ( " Cadadaguios, a town in the 

 southwestern part of Louisiana"). 

 Regarded by Allen (Bull. Amer. runs. nat. hist., v, p. 56, April 

 28, 1893) as undetenninable. 



Thoniomys toltecus Allen. 



1893. Thoinoinya toltecus Allkx. Bull. ^Vmer. mus. nat. hist., 



Y, p. 52. April 28, 1893. 

 Type locality. — Juai-ez, State of Chihuahua, ^Mexico. 



Thomomys tO"wnsendii (Bachman). 



1839. (jr(<>))ii/s toftistHdii Bachmax, Journ. acad. nat. sci. 



Phila., Yiii, p. 105. 

 1893. Tho)iio>n(/s t(no7ts€ndli Allex, Bull. Amer. mus. nat. 



hist., Y, p. 61. Ajml 28, 1893. 

 Ty'pe locality. — " Rocky Mountains "; probably southwestern 



Wyoming (see Allen, Bull. Amer. mus. nat. hist., y, p. 61, 



April 28, 1893). 



Family HETEROMYIDAE. 



Subfamily Dipodomyixae. 



Genus DIPODOMYS Gray 



1841. Dipodowys Gray, Ann. and mag. nat. hist., yii, p. 521, 

 August, 1841. Type. — Dipodomijs pMllipsii Gray-. 



Dipodomys ambiguus Merriam. 



1890. Dipodcnnys ambiyKus Merriam, North Amer. fauna 



no. 4, p. 42. October 8, 1894. 

 Type locality. — El Paso, El Paso County, Texas. 

 Regarded by Merriam (Science, n. s., vii, p. 31, January 7, 1898) 

 as a form of D. itierr%<un,i. 



