_Peromyscus perfulvus_ Osgood, Jour. Mamm., 26:299, November
14, 1945, type from 10 kilometers west of Apatzingan,
1,040 ft., MichoacAin.
_Range._--Known only from the semitropical Life-zone in western
MichoacAin.
_Specimens examined_, 5: nos. 100593, 100595, 100597, 100598, and
100600, all from 1 mi. E and 6 mi. S TacAimbaro, 4,000 ft.
_Remarks._--J. R. Alcorn took these specimens between fields of sugar
cane in tall (5 ft. high) grass growing in a belt 10 feet or so wide
along side a stream, which a person could step across. The one adult,
no. 100597, was recognized at the time of capture as different from
any other species known to us, by reason of the long, unicolored,
sparsely-haired tail and nearly clear Cinnamon Rufous color above,
white underparts, white feet, and dark brown ears. The four other
specimens in darker immature pelage are plumbeous and cinnamon whereas
immature individuals of comparable age of _Peromyscus banderanus_
caught in the same place are plumbeous above and lack the cinnamon
color. The immature animals of the two species differ in color more
than do the adults. Osgood (1945:300) has recorded eleven specimens
from the type locality. Our one adult weighs 52.4 grams.
=Peromyscus boylii evides= Osgood