New Lemming Mouse from Wliife Mountains. 45 



eni methods of collecting have brought to light, even in this thickly settled 

 region. The type and only known specimen was taken near the banks 

 of a small stream (called on some maps Dartmouth Brook), which leis- 

 urely winds its way through a piece of swampy ground well grown up to 

 alders and other small trees, just before losing itself in the noisy Ammo- 

 noosuc. The carriage road leading from Fabyans to the base of Mt. 

 Washington crosses the brook at this point after covering aliout a mile 

 of its course. To the left of this road, where my collecting was done, the 

 ground is swampy and quite densely carpeted with moss, through which 

 spring many grasses and swamp-loving plants, overtopping, to a great 

 extent, the logs, stumps, and fallen trees with which the ground is strewn. 



j\Iy traps, set here for three nights, captured numerous specimens of 

 meadow mice {Microtus), woodmice { Peromyscus) , short- tailed shrews 

 {Blarlna), red-backed mice {Evotomys), two species of jumping mice 

 {Zapns Jiudsouius and Z. lusigiiifi), in addition to the Synaptomys here de- 

 scribed. The Synaptomys was taken in a runway in the moss, beneath a 

 small fallen tree. 



Whether this species is a wanderer from the Hudsonian Zone on the 

 neighboring mountains, guided thence by that ideal highway, a moun- 

 tain stream, or wiiether it is a regular inhabitant of the Canadian Zone 

 throughout this region, is an interesting question, to be solved by future 

 investigations. 



