_Specimens examined._--Total, 36: North end Mesa Verde National
Park, 7000 ft., 76233-76237; entrance to Mesa Verde National Park,
5123-5126 in Denver Museum; Prater Canyon, 7600 ft., 76238-76244;
Upper Well, Prater Canyon, 7575 ft., 69441; Morfield Canyon, 7600
ft., 76245-76259, 76261-76263; west bank Mancos River, northeast
side Mesa Verde National Park, 76260.
The vegetation at the above-named localities is a combination of brush
and grasses that are both more luxuriant than in areas dominated by
pinyon and juniper on the more southern and altitudinally lower part of
the top of the Mesa where no _M. longicaudus_ was taken.