A New Bog Lemming (Genus Synaptomys) From Nebraska

#Synaptomys cooperi relictus#, new subspecies

Type.--Adult female, skin and skull, University of Kansas Museum of Natural History no. 51617, from Rock Creek State Fish Hatchery, 5 mi. N, 2 mi. W Parks, Dundy County, Nebraska; obtained November 1, 1952, by J. Knox Jones, Jr., original no. 995.

Distribution.--Known only from the type locality.

Diagnosis.--Size large for the species, both externally and cranially; dorsal pelage dark; nasals broadly flared anteriorly (especially broad in relation to nasal length); auditory bullae small; molariform tooth-rows and incisive foramina long.

Measurements (in millimeters).--External measurements of the type specimen, followed by those of another adult female (KU 72603), are: Total l