19 



of the condyle (unique among Armcolinse). Bony palate ending 

 in a straiglit flat shelf opposite middle molars, the whole space 

 between last molars thus left open. General form arvicoline, but 

 ears distinctly overtopping the fur as in Murinse. A strong 

 genus, linking the two subfamilies. There are many peculiarities 

 besides these given. 

 1. Evotomys rutilus, (Pall.) Coues. 



Syn. Mm rutilm, Pall., N. Sp. Quad. Glir. 1778, 246, pi. xiv. B. 

 Arvicold qappevi, Dall, Alaska and its Resources, 1870, 577. 

 Hah. Arctic, circumpolar. Southward in this country this spe- 

 cies shades into the following variet}^ : — 



la. Evotomys rutilus, vnr. gapperi, (Vig.) Coues. 



Syn. Arvicola guppei-i, Vig. Zool. Journ. v. 1830, 204, pi. 9. (Canada.) 

 Arvicola {Hypudmus) ga2)j)eri, Baird, M. N. A. 1857, 518. 

 Arvicola fulva, Aud. and Bach., J. A. N. Phil. viii. 1842, 295. 



(Name preoccupied.) 

 Arvicold dehiyi, Aud. and Bach., Q. N. A. iii. 1854, 287 (same as 

 their A. fulva of 1842). Excl. syn. '' oneida UeKay" which belongs 

 to A. riparius. 

 Hah. Northern frontier of United States, from Atlantic to 

 Pacific, and adjoining belt of British America. South to Massa- 

 chusetts. 



Oha. This species and its variety are distinguished at a glance 

 b}" the prominent ears and chestnut coloration. 



Genus VI. ARVICOLA, Lacep., emend. 



Syn. Mufi, sp., Liun., Syst. Nat. i. 1766, et auct. antiq. — Mures cunicu- 

 larii. Pall., N. Sp. Glir. 1778, 77. — Lemmus, Linck, Fischer, et al. — 

 Myodes, Pall., Zoog. E. A. i. 1811, 172 (not Myodes of Selys-L., 

 1839, which = i/'^i)»f?««.';. Keys, and '&{&&.■= Evotomyfi., Cones). — 

 Arvicola, Lacepede, Tabl. 1803, et auct. recent, (includes ampMbius 

 and arvalis). — Hypudwm., 111., Prod. 1811 (not of Keys, and Bias., 

 nor of Baird. Includes lemmus., ampMbius and arvalis), — Myonomes, 



Rafinesque, (type "Wilson's Meadow Mouse" = ^?'OTCO?a 



pennsylvanica of Ord.). — Psammomys, Le C, Ann. Lye. N. Y. 

 1829, 132 (type pineiorum ; not of Rueppel). — Pitymys, McMurtrie, 

 ed. Cuvier, i. 1831, 434 (type A. pinetorum). — Hemiotomys, Selys-L., 

 Etudes, 1839, 85 (amphibius, terrestris, etc.). — Microius, Selys-L., 

 Etudes, 1839, SQ.—Pinemys, Lesson, Nouv. Tabl. R. A. 1842, 12 

 (type pinetorum). — Hemiotomys, Bd., M. N. A. 1857, 515 (type 

 A. riparius, Ord.). — Pedomys, Bd., op. cit. 517 (type A. austerus, 

 Le C). — Chilotus, Bd., op. cit. 516 (type oregonus, Bach.). ^ 



