aken
males measured 4 and 2, whereas those of one taken on July 17 and
another captured on August 3 measured 6.0 and 7.5, respectively.

Of seven adults collected in the period August 3 to 6, three females and
two of four males were in fresh pelage; molt was nearly completed on the
two remaining males. A male taken in mid-July was in an early stage of
molt. New pelage is pale yellowish brown in contrast to the golden brown
pelage of specimens taken in May and June.

Chiggers, _Leptotrombidium myotis_ (Ewing), were found on the ears of
one long-eared myotis.

~Myotis leibii ciliolabrum~ (Merriam, 1886)

Small-footed Myotis

Eight males of this saxicolous species were shot or netted as they
foraged over a small man-made pond in wooded Deer Draw in the Slim
Buttes, 10 mi. S and 5 mi. W Reva--six in late June and two in early
August. Probably this bat will be found in rocky areas elsewhere in the
county. One specimen taken on June 23 was molting over much of the body.

~Myotis lucifugus carissima~ Thomas, 1904

Little Brown Myotis

_Specimens examined_ (27).--2 mi. N, 5 mi. W Ludlow, 1; NW 1/4 sec. 15,
R. 5 E, T. 22 N, 4; NE 1/4 sec. 24, R. 8 E, T. 21 N, 20; 4 mi. S, 7 mi.
W Ladner, 1; 10 mi. S, 5 mi. W Reva, 1.

This bat is widely distributed in northwestern South Dakota and was the
only species of _Myotis_ reported by Visher (1914:91) in his early
natural history survey of Harding County. We took specimens from several
of the wooded buttes and also in areas well-removed from timber; one was
shot, for example, as it foraged over the Little Missouri River in the
extreme western part of the county. On May 28, 1968, a barn was located
in which an incipient maternal colony (several hundred adult females)
roosted between double rafters supporting a metal roof. The owner of the
barn, Robert Parks of Ralph, stated that bats have utilized this place
as a summer roost for several years. The barn stands adjacent to the
nearly treeless Big Nasty Creek, which flows through the hilly terrain
of the northeastern section of the county.

Fourteen of 20 females taken from the colony each carried a single
embryo (crown-rump lengths measured 2 to 11 with a mean of 5.4). The
other six were not visibly pregnant upon gross examination but had
enlarged uteri, possibly indicating recent implantation. Of the
remaining females from Harding County, three collected on May 29 had
enlarged uteri, whereas two collected in late June evide