_Specimens examined_ (2).--4 mi. S, 7 mi. W Ladner, 1; 10 mi. S, 5 mi. W
Reva, 1.
This rabbit is uncommon in northwestern South Dakota and evidently is
strictly associated with riparian habitats. Our only specimens were
taken along the Little Missouri River, where thickets and small
cottonwood trees were prevalent, and at the edge of a thicket in
spring-fed Deer Draw of the Slim Buttes.
A female obtained on June 26 carried eight embryos that measured 26, and
was in process of seasonal molt. Testes of a male shot on May 20
measured 35.