SIZE 



XX. 



Canadian Red-backed Vole, Red Wood-vole, or 

 Gapper Mouse, Long-eared Ground-mouse. 



Evotomys gap peri (Vigors). 



(Evotomys, from Gr. ev, well ; otos, ear ; mys, mouse, a name given to tBe genus 

 by Dr. E. Coues in 1874, on account of the 'well-developed ears' when com- 

 pared with Microtiis; gappdri in honour of Anthony Gapper, who collected the 

 first specimen known to science. He found it on his brother's farm near Lake 

 Simcoe and sent it to Vigors, who described and named it in 1830.) 



Arvicola gapperi ViGORS, 1 830, Zool. Journ., V, p. 204. 

 Evotomys gapperi Merriam, 1 891, N. A. Fauna, No. 5, p. 119. 

 Type Locality. — Near Lake Simcoe, Ontario. 



French Canadian, le Campagnol rouge. 



The genus£^'o?omJyi■,(Coues, 1874) comprises Meadow-mice 

 much Hke those in the genus Microtus, but readily distinguished 

 by their large ears^ longer tails, and red back. (See Plate 

 XXXIX, Fig. a.) 



The tooth formula is as in Microtus , though there are many 

 minor differences in the teeth. 



The Gapper Mouse, in addition to its generic characters, 

 has the following: 



Length, 5I inches (146 mm.); tail, i| inches (38 mm.); 

 hind-foot, | inch (19 mm.). 



COLOUR General colour of the body a buffy or pale ochraceous; 



the broad band along the back from crown to tail, chestnut, 

 streaked with black hairs; under parts, pale buff; feet, gray; 

 tail, brownish above, gray buff below, tip black. In summer, 

 darker. 



Usually the male has on each flank a gland marked by 

 a pale patch, of fur. 



506 



