rivers, Uintah County. The northernmost
specimens available to Durrant (1952:328) were from one mile east of
Greenriver, Grand County. These specimens from Uintah County extend the
known range 80 miles to the north, and substantiate Durrant's
conclusion that this subspecies occurs east of the Green and Colorado
rivers.

_=Clethrionomys gapperi uintaensis=_ Doutt. Red-backed
Mouse.--Previously, the red-backed mouse in Utah was known only from
the Uinta and Wasatch mountains. The southernmost localities from which
specimens were available were in northern Wasatch County and southern
Salt Lake County. Durrant (1952:355) supposed that the species ranged
southward to Mount Timpanogos in Utah County. One specimen, No. 10,075,
from the summit, 18 miles east of Mayfield, Sanpete County, and 4 from
Ephraim Canyon, 15 miles east of Ephraim, Sanpete County, show that
this subspecies occurs also on the Wasatch Plateau of central Utah.
These latter specimens extend the known range of the red-backed mouse
in Utah approximately 100 miles southward. Owing to the practically
continuous nature of the central mountain ranges of Utah, students of
mammals of Utah usually suspect that most montane mammals occur
throughout these mountain ranges. The red-backed mouse has been sought
for in vain in the mountains south of the Wasatch Plateau. Suitable
habitats for this mouse occur throughout the Fishlake Mountains,
Thousand Lake Mountains and the Aquarius Plateau, but despite intensive
collecting, none has been obtained from these areas.

_=Phenacomys intermedius intermedius=_ Merriam. Heather Vole.--The
heather vole, while not rare, is uncommon in Utah. Durrant (1952:360)
had but eight specimens from various localities in Summit, Wasatch,
Salt Lake and Utah counties and supposed that the species was
restricted to the western Uinta Mountains and southern Wasatch
Mountains. In the summers of 1952 and 1953, intensive collecting of
mammals was carried out on Boulder Mountain and the Aquarius Plateau,
in Wayne and Garfield counties. Two specimens, nos. 8956 and 9074, were
obtained from Spectacle Lake, Boulder Mountain, Garfield County. These
specimens extend the known area of occurrence 175 miles southward in
Utah. No specimens are known from the areas between Mount Timpanogos in
Utah County, and Boulder Mountain in Garfield County. We suspect,
however, that when this intervening area has been thoroughly studied,
the heather vole, like many other