_Specimens examined._--Total, 17: North Rim above Morfield Canyon,
MV 7856/507; Morfield Canyon, 7600 ft. (obtained on Nov. 4, 1957),
75976; Middle Well in Prater Canyon, 7500 ft, MV 7855/507; Prater
Canyon, 7600 ft., MVZ 74414; Park Point, 8525 ft., 69267-69270; 1/4
mi. S, 3/4 mi. W Park Point, 8300 ft., 69271-69272; Sect. 27, head
of east fork of Navajo Canyon, 7900 ft., 69273; Far View Ruins,
7700 ft., 69274-69275, and two uncatalogued specimens in
preservative; 3 mi. N Rock Springs, 8200 ft., 69276-69277.
Five of the fourteen specimens of known sex are females, all of which
were taken in August and September, and none of which is recorded as
having contained embryos. The skulls of the eight August-taken specimens
also suggest that young are born in late spring or early summer: the
largest skull had well-worn teeth that might indicate an age of more
than one year; four others had complete adult dentitions that were
barely worn; and three had not yet acquired complete adult dentitions.
The records of _E. minimus_, like those of _Spermophilus lateralis_,
indicate greatest abundance in the higher parts of the Mesa Verde and in
areas of predominantly brushy vegetation.