RODENTIA M UKID^E ARVICOLA RIPAR1US. 



107 



Arvicola xant/wgnatha, HARLAN, Fn. Am., 1825, 130 (also of Goclmaii, Say, UeKay, 



and Linsley, but not of Leach nor of Richardson). 

 Arvicola alborvfescens, EMMONS, Rep. Quad. Mass., 1840, 00 (albino). 

 Arvicola hirsuttts, EMMONS, loc. cit. 



Arvicola nasttta, BACHM., J. A. N. S. Phila., viii, 1842, 290 (Massachusetts). 

 Arvicola oneida, DcKAY, N. Y. Fn., i, 1842, 88, pi. xxiv, f. 1 (New York). 

 Arvicola rufcsccns, DEKAY, op. cit., 85, pi. xxii, f. 1 (New York). 

 Arvicola occidentalis, PEALE, Mamm. U. S. Ex. Ex., 1848, 45 (Puget Sound). 

 Arvicola californica, PEALE, op. cit., 46 (California). 

 Arvicola montaiia, PEALE, op. cit., 44 (California). 

 Arvicola edax, LEC., P. A. N. S. P., vi, 1853, 405 (California). 

 Arvicola borcalis, LEC., op. cit., 407 (Rhode Island), (not of Rich.). 

 Arvicola trowbridgci, BD., M. N. A., 1857, 529 (iu text), (California). 

 Arvicola longirostris, BD., op. cit., 530 (California). 

 Arvicola inodcsta, BD., op. cit., 535 (Rocky Mountains), (very young). 

 Arvicola rujidorsum, BD., op. cit.. 520 (Mass.), (reddish specimen). 

 Arvicola brcwcri, BD., op. cit., 525 (Muskeget, Mass. ; bleached insular race). 



Specimens. 



Numerous specimens attest the abundance of this species in the regions 

 explored. Only one other is certainly known from the same portion of the 

 continent, the A. curtata of Cope, a variety of Pedomys austerus, the 

 synonymy of which last is also subjoined for comparison : 



Subgenus PEDOMYS, Baird. 



Pedomys, BD., M. N. A., 1857, 517 (type, A. austcrns, LEC.). 

 For characters of this subgeuus. see table, p. 106. 



