156 MONOGEAPHS OF NOKT11 AMERICAN RODENTIA. 



as many dividing lines as can be drawn betweeD individual species and little 

 groups of conspecies. On this consideration, we have no scruple in drawing 

 up the characters of Myonornes so stringently thai all the European and Asiatic 

 Forms shall be excluded if possible. 



Though we adopt the term "Myonorr.es" for what Professor Baird called 

 Hemiotomys, we do not suppose that Rafinesque'had any idea what he was 

 about when he invented it. But there stands the name "Myuomes praten- 

 sis", based upon Wilson's Meadow Mouse, afterward Arvicola pennsylvanica 

 of Ord, which is also Arvicola riparius of Ord. We do not sec how the 

 name can be rejected, seeing that his type — a now well-known species — is 

 mentioned; and, after all, it is perhaps just as well that he did not try to 

 explain what he meant. 



ARVICOLA (MYONOMES) RIPARIUS, Ord. 



Common American Meadow Mouse. 



Campagnol or Meadow Mouse of Pennsylvania, Warden, "Descr. U. S. v, 025." 



\feadow Mouse, Wilson, Am. Orn. vi, pi. 50, f. 3. 



Mynomes pratensis, Raitnesque, Am. Monthly Mug. ii, 1817, 45. * 



Arvicola pennsylvanica," Ord, Guthrie's Geog. 2d Am. cd. ii, lel5, 292 (based on Wilson, /. c). — Harlan, 

 Fn. Amer. 1825, 144 (in part. Quotes Ord, I. e., and describes pinetorum). — Wagner, Suppl. 

 Schreb. viii, 588.— Schinz, Synopsis, ii, 1845, 24?.— Aid. & Bach., Q. N. A. i, 1849, 341, pi. 

 xlv. f. —.—LeConte, Proc. Acad. Nat. Sci. Phila. vi, 1853, 407. 



Arvicola palustris, Harlan, Fn. Amer. 1825, 130; Med. & Phys. Researches, 1835, 47. 



Arvicola riparius, Ord, Journ. Acad. Nat. Sei. Phila. iv, pt. ii, 1825, 305 (Philadelphia), (not of Richard- 

 sou ?).— DeKav, N. Y. Zool. i, 1842, 84, pi. xxii, f. 2 (y< ung?).— Aud. & Cacti., Q. N. A. iii, 

 1854, 302 (not figured. In text under " montaua") — LeConte, Proc. Acad. Nat. Sci. Phila. 

 vi, 1853, 400.— Baird, M. N. A. 1857, 522 (Eastern Uuited States).— Godman, Amer. Nat. Hist. 

 3d ed. 1800, i, 301.-»- Allen, Mainm. Mass., Hull. Mus. Comp. Zool. No. 8, 231.— Aud of late 

 authors generally. 



Arvicola (Myonomes) riparius, Codes, Proc. Acad. Nat. Sei. Phila. 1874, 189. — Coues & Yarrow. Zool. 

 Expl. W. 100th Merid. 187G, — . 



Arvicola riparius lougipilis, Kennicott, Agric. Rep. U. S. Patent Office for 1850-1850, 304 (specimens in 

 heavy winter pelage from West Northfield, 111.). — Baird, M. N. A. 1857, 524 (iu text; same 

 as Kennicott's). 



Eypudce.ua riparius, Maximilian, Arch. Natnrg. xviii, 1862; Yerz. N.-A. Siing. 1802, 174. 



Arvicola xanthognatha, Harlan, Fn. Amer. 1825, 130. — GODMAN, Amer. Nat. Hist, ii, 1*20, 05: and 3d ed. 

 1860, i, 299 {not of Leach and Richardson). — Say, Long's Exped. R. Jits, i, 1823, 369.— DeKay, 

 N. Y. Zool. i, 1842, 90.— Linsley, Am. Journ. Sci. sliii, 1842, 350— ?? Sabine, App. Frank- 

 lin's Journ. 1825, GOll.t 



"This should stand, in strictness, as the specific name, with which Ord antedates Rafinesque. 

 Since, however, the name is simply based, without sufficient description, upon a scarcely recognizable 

 figure incidentally introduced in an ornithological work, I have preferred to adopt the same author's 

 properly-characterized term riparius, though subsequent in point of date. Though I am aware that this 

 course is, technically, indefensible, such slight latitude of choice stands to common sense, and infringes 

 upon no author's rights, as Old's earlier term cuts Ratincsipio out of his. 



t Doubtful. 1 have not been able to look up this reference; but Richardson says(F. 11. -A. i, 122), 

 "The description quoted by Sabine * * under title of J. xanthognatha does not belong to this animal, 

 but to a much smaller species, which I have referred to the .1. pennsylvanica of Old." 



