CYNOMYS. H7 



Genus 53. 1'yiiomys. 



Cynomys Rafin., Am. Month. Mag., n, 1817, p. 45. Type Arctomys 



ludovicianus Ord. 

 Anisonyx Rafin., Am. Month. Mag., n, 1817, p. 45. (nee Latreille, 



Coleopt., 1807.) 

 Monax Warden, Statist. Polit. Hist. Ace. U. S., i, 1819, pp. 225- 



228. 



228. Cynomys ludovicianus (Ord). 



Arctomys ludovicianus Ord, Guth. Geogr., 2d Am. ed., n, 1815, 



p. 292. 



Cynomys socialis Rafin., Am. Month. Mag., n, 1817, p. 45. 

 Cynomys grisea Rafin., Am. Month. Mag., n, 1817, p. 45. 

 Arctomys missouriensis Warden, Desc. Etats Unis, v, 1820, p. 627. 

 Arctomys latrans Harlan, Faun. Am., 1825, p. 306. 

 Cynomys ludovicianus Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 n, 1901, p. 102, fig. 23. Zool. Ser. Id. Mamm. Middle Amer. 

 & W. Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 155, figs. 28, 

 xxxii. Zool. Ser. 



PRAIRIE-DOG. Perrito, Perrito del Campo in Mexico. 

 Type locality. Plains of the Upper Missouri. 



Geogr. Distr. From 4gth parallel southwest of the Mississippi 

 through western Kansas and Texas into the State of Chihuahua, 

 Mexico. 



229. Cynomys pyrrotrichus Elliot. 



Cynomys pyrrotrichus Elliot, Proc. Biol. Soc. Wash., xvm, 1905, 



P- J 39- 

 RED PRAIRIE-DOG. 



Type locality. White Horse Spring, Oklahoma Territory. 



Genl. Char. General color cinnamon rufous, altogether different 

 from that of C. ludovicianus. Skull compared with that of above- 

 named species has a narrower palate and larger bullse; and with ari- 

 zonensis has a broader braincase and wider nasals. 



Color. Head, upper parts of body and sides cinnamon rufous, dark- 

 est on head and dorsal region, each hair tipped with whitish, most 

 conspicuous on sides of rump and flanks; under parts and inner side 

 of legs pale yellowish washed or tinged with rufous on chest and 

 abdomen grading on sides into the color of the flanks; upper parts of 

 fore legs and feet pale vinaceous cinnamon ; outer side of thighs pale 

 cinnamon rufous; feet pale vinaceous buff; claws black; tail cinna- 

 mon rufous, grading to Van Dyke brown at tips. 



