NATURAL SCIENCES OF PHILADELPHIA. 191 



Arvicola {Pedomys) cinnamoma, Bd. cp. cit. 541, pi. liv. (Minnesota.) 

 Arvicola {Pedomys) haydeni, Bd., o^;. cit. 543. (Nebraska.) 



Hah. Western States and adjoining Territories, especially Illi- 

 nois, Missouri, and Michigan. Kansas. Louisiana. 



oa. Arvicola (Pedomys) austerus, var. curtatus, Cope. 



Syn. Arvicola curiata, Cope, Pr. A. N. S. Phila. 1868, 2. (Owen's Valley, 

 California.) 



Hab. United States, west of the Mississippi. California. Colo- 

 rado. Kansas and Nebraska, where becoming mixed up with true 

 austeints. 



Obs. In comparing his supposed new species with "^. modesta,^^ 

 Prof. Cope was misinformed as to its affinities. It is a true 

 Pedomys. not in the least like any style of Myonomes, as I ascer- 

 tain by inspection of the type specimen. Its extreme modifica- 

 tion is peculiar in the small size, and very short tail (less than the 

 head) : it sliades directly into ordinary austerus. 



Subgenus Pitymys, McMurtrie. 



Syn. Psammomys, Le C, 1829, nee Buppel (type pinetorum) . Pitymys., 

 McMurt., 1831 (same type). Pinernys, Less, 1831 (same type). 



6. Arvicola (Pitymys) pinetorum, Le Conte. 



Syn. Arvicola penn.^yloanica, Harl., Fn. Amer. 1825, 144, in part; the 



descr. but not the synon. {not of authors). 

 Psammomys pinetorum, Le C, Ann. Lye. N. Y. iii. 1829, 132, pi. ii. 

 Pitymys pinetorum, McM., Am. ed. Cuvier, i. 1831, 434. 

 Pinemys pinetorum, Less., Nouv. Tabl. R. A. 1842, 12. 

 Arvicola pinetorum, Aud. and Bach., Q. N". A. ii. 1851, 216, pi. Ixxx. 



(excl. syn. '^ oneida DeKay.") 

 Arvicola {Pitymys) pinetorum, Bd., M. N. A. 1857, 544. 

 Arvicola scalopao/des, Aud. and Bach., J. A. N. S. Phila. viii. 1842, 



299 (Long Island). 

 Arvicola apellu, Le C, P. A. N. S. P. vi. 1853, 405. (Pennsylvania.) 



6a.'? Arvicola (Pitymys) pinetorum, var. quasiater, Coues, n. v. 



Diag. Subgeneric characters of Pitymys (skull not seen), and 

 somewhat resembling P. pinetorum (particularly the large dark 

 stjde formally called scalopsoides). Rich glossy blackish, ap- 

 pearing quite black at first sight, but this color warmed into a 

 slight auburn shade by uniform admixture of dusky chestnut or 

 chocolate brown. No markings anywhere; color of the upper parts 

 changing on the sides insensibly into blackish-ash or dark plumbe- 

 ous of the under parts, which are slightly hoary. Tail like back 



