lacer
Co._: Blue Canyon, 1 (NM). _Alpine Co._: Markleeville, 1 (BS); N
fork Stanislaus River, 1 (BS).

#Eutamias speciosus# (Merriam)

Figure 15

General tone of upper parts bright; light and dark elements of
color pattern strongly contrasting; outer stripes broad and
strikingly conspicuous; size medium; skull moderately broadened;
dorsal outline of skull strongly arched in profile; upper
incisors short and sharply recurved.

Baculum: Shaft thick; keel of medium height, 1/3 of length of tip; base
of keel 1/3 of length of tip; tip 47 to 55 per cent of length of shaft;
angle formed by tip and shaft 90 deg.; distal 2/3 of shaft markedly
compressed laterally; base markedly wider than shaft; shaft short to
medium, 2.11 to 3.17 mm.

Differs from _E. panamintinus_, in base of keel proportionally shorter,
angle formed by tip and shaft smaller; from _E. umbrinus_ and _E.
palmeri_, in keel higher, angle formed by tip and shaft smaller, distal
2/3 (not 1/2) of shaft markedly laterally compressed, base markedly
wider; from _E. bulleri_, in keel smaller, shaft shorter, tip
proportionally longer, ridges on either side of tip distinct.

For comparisons with all other species of chipmunks of western North
America, see the accounts of those species.

The baculum in _E. speciosus frater_ is approximately the same size as
in _E. umbrinus inyoensis_, but differs in shape as described above.

_Specimens examined_: 6.

_E. speciosus frater_: California: _Madera Co._: San Joaquin
River, near head of N fork, Sierra Nevada Mountains, 2 (BS).

_E. speciosus sequoiensis_: California: _Tulare Co._: Mount
Whitney, 1 (BS); Sequoia National Park, 2 (BS).

_E. speciosus callipeplus_: California: _Kern Co._: Mount Pinos,
1 (BS).

#Eutamias panamintinus# (Merriam)

Figure 16

Dorsal dark stripes reddish; size small to medium; skull of
medium size; braincase flattened.

Baculum: Shaft thick; keel low, 1/3 of length of tip; base of keel 1/2
of length of tip; tip 52 per cent of length of shaft; angle formed by
tip and shaft 110 deg.; distal 2/3 of shaft moderately compressed
laterally; base markedly widened; shaft short, 2.17 mm.

Differs from _E. umbrinus_ and _E. palmeri_, in distal 2/3 (rather than
1/2) of shaft moderately compressed laterally; from _E. bulleri_, in
keel smaller, shaft shorter, ridges on either side of tip distinct.

For comparisons with other spe