: adult, 0; adult, 4, 11 mm.

_Synaptomys cooperi._ Cooper lemming-vole

August 11: adult, 2, 10 mm.

_Microtus pennsylvanicus pennsylvanicus._ Pennsylvania vole

July 15: adult, 4, not measured, juvenile, 0.
August 9: subadult, 0.
August 10: subadult, 0; subadult, 0.
August 13: subadult, 0.
August 16: adult, 0.
August 24: adult, 4, 11 mm.

_Microtus ochrogaster._ Prairie vole

July 25: juvenile, 0.
August 15: adult, 4, small.

_Microtus pinetorum scalopsoides._ Northern pine vole

July 22: juvenile, 0.
July 25: juvenile, 0.
July 31: adult, 0.

_Rattus norvegicus._ Norway rat

July 11: adult, 7, 37 mm.
July 12: adult, 9, 26 mm.
July 14: juvenile, 0.

_Mus musculus musculus._ House mouse

July 9: subadult, 0.
July 10: juvenile, 0; subadult, 0.
July 11: adult, 0 (was nursing 3 or more half-grown young).
July 17: adult, 11, 6 mm.
July 22: adult, 7, 3.5 mm.

_Zapus hudsonius hudsonius._ Hudson Bay jumping mouse

July 27: subadult, 0.

_Marmota monax monax._ Southern woodchuck

July 11: adult, 0.
July 28: juvenile, 0.
August 3: adult, 0.
August 22: juvenile, 0.

_Citellus tridecemlineatus tridecemlineatus._ Thirteen-striped ground
squirrel

August 14: adult, 0.

_Sciurus hudsonicus loquax._ Southern red squirrel

July 24: adult, 0.
July 27: juvenile, 0.

_Sciurus niger rufiventer._ Fox squirrel

August 11: subadult, 0.

_Sylvilagus floridanus mearnsii._ Mearns cottontail

July 21: adult, 4, 70 mm.

NEW STATE RECORD OF THE PRAIRIE VOLE

The specimens of prairie vole, _Microtus ochrogaster_, listed above from
the sedges and rushes of cleared upland in the Warren Woods preserve and
from a nearby wheat field constitute the first authentic record of the
species from Michigan. The prairie vole had previously been erroneously
reported to be abundant in Washtenaw County by Covert[2], who evidently
mistook the Pennsylvania vole for this species.

OTHER MAMMALS OF THIS REGION

The following notes on mammals formerly or at present living in the
region but not found by me in Warren Woods are based mostly on
information furnished by George R. Fox, Director of the Edward K.
Warren Foundation, and by William Schmidt, a trapper and hunter.

_Didelphis virginiana virginiana._ Virginia opossum. Three were seen
and one captured in Three O