g institutions for permission to
use the collections under their charge: Biological Surveys Collection,
United States National Museum (herein abbreviated USBS); California
Museum of Vertebrate Zoology (MVZ); Chicago Natural History Museum
(CNHM); University of Kansas Museum of Natural History (KU); Museum of
Comparative Zoology (MCZ); United States National Museum (USNM);
Department of Economic Zoology, University of Wisconsin (UWDEZ); and
Zoological Museum, University of Wisconsin (UWZM).

Synaptomys cooperi saturatus Bole and Moulthrop

1942. _Synaptomys cooperi saturatus_ Bole and Moulthrop, Sci.
Publs. Cleveland Mus. Nat. Hist., 5:149, September 11, type from
Bloomington, McLean County, Illinois.

When Bole and Moulthrop named _Synaptomys cooperi saturatus_, with type
locality in Illinois, they, in effect, divided the geographic range of
_Synaptomys cooperi stonei_ into two parts (see A. B. Howell, N. Amer.
Fauna, 50:10 (fig. 2), August 5, 1927) since Bole and Moulthrop (_op.
cit._) did not assign to any subspecies the specimens from southern
Wisconsin that Howell (_op. cit._) had identified as _S. c. stonei_.
Bole and Moulthrop's inclusion in their newly named subspecies of a
specimen from as far west as East Columbia, Missouri, left in doubt the
subspecific identity of specimens from Iowa and a specimen from
Arkansas. Howell (_op. cit._) had assigned this material from Iowa and
Arkansas to _S. c. gossii_.

Howell recognized that the one individual (168266 USBS) from Lake City,
Arkansas, was too young to be identified to subspecies with certainty
and assigned the specimen to _S. c. gossii_ "upon geographical grounds"
(_op. cit._:19). Keith R. Kelson and one of us (Hall) compared this
specimen with pertinent materials. As a result of this comparison we
refer the specimen, on the same grounds employed by Howell, to
_Synaptomys cooperi saturatus_.

Specimens from approximately the southern half of Wisconsin (from Kelly
Lake southward) were referred to _S. c. stonei_ by Howell (_op.
cit._:16). Now that _S. c. saturatus_ has been recognized, these
specimens from southern Wisconsin would be expected to be referable to
_S. c. saturatus_. When these specimens were examined and compared (by
Hall and Kelson) with other specimens in the United States National
Museum the skulls were found to be much larger than in _S. c. cooperi_,
smaller than in _S. c. gossii_, and nearly the size of those of
_Synaptom