[Illustration: FIG. 112. Pennsylvania meadow mouse (_Microtus pennsylvanicus kincaidi_), from ten miles south of Moses Lake, Washington, April 28, 1940. (Fish and Wildlife Service photo by Victor B. Scheffer, No. 937.)] _Microtus pennsylvanicus_ is the most common meadow mouse of the eastern United States. It ranges westward through Canada and southward in the Rocky Mountains. A number of races occur in this extensive range. In northeastern Washington the eastern meadow mouse is locally common, being confined to marshes and damp meadows. Well-used runways are made through the dense vegetation and piles of feces and blades of grass are deposited therein. A number of broods are raised in a season, for young of many different ages are taken together in midsummer. On the Columbian Plateau this mouse lives in marshy areas about lakes and potholes. Narrow trails are constructed through the dense vegetation. It burrows in damp earth and some occupied burrows are half-full of seepage water. Cuttings found in runways show that the mice feed on a variety of plants, including sedge (_Carex_). In the Moses Lake area the breeding season begins in March. Embryos found March 24, 1940, varied from 4 to 7 in number. This species is cyclically abundant. [Illustration: FIG. 113. Distribution of the Pennsylvania meadow mouse in Washington. A. _Microtus pennsylvanicus funebris._ B. _Microtus pennsylvanicus kincaidi._] =Microtus pennsylvanicus funebris= Dale _Microtus pennsylvanicus modestus_ Bailey, N. Amer. Fauna, 17:20, June 6, 1900. _Microtus drummondii_ Bailey, N. Amer. Fauna, 17:22, June 6, 1900. _Microtus pennsylvanicus funebris_ Dale, Jour. Mamm., 21:338, August 13, 1940. _Type._--Obtained at Coldstream. 1,450 ft., 3-1/2 miles southeast of Vernon. British Columbia, by T. P. Maslin. Jr., on August 2, 1937; type in Museum of Vertebrate Zoölogy. _Racial characters._--Size medium; color reddish brown; fur short, harsh; skull small and narrow. _Measurements._--Three males from Newport, Pend Oreille County, average: total length 165; length of tail 40; hind foot 20; ear 15.3. _Distribution._--Northeastern Washington, west to Conconully (Taylor and Shaw, 1929: 24) and east to Newport (W. W. D.). _Remarks._--Specimens from northeastern Washington are larger and darker, more reddish and less gray, than _drummondii_. They are larger, more reddish, and have relatively narrower skulls, than _modestus_ from Colorado and Idaho. They closely resemble _funebris_ from south-central British Columbia, and are best referred to that race. Rand (1943: 123) considers _funebris_ a synonym of _modestus_ but I feel is incorrect in doing so. =Microtus pennsylvanicus kincaidi= Dalquest _Microtus montanus kincaidi_ Dalquest, Proc. Biol. Soc. Washington, 54:145, September 30, 1941.