_Sitomys musculus_ Merriam, Proc. Biol. Soc. Washington,
7:170, September 29, 1892, type from Colima, Colima.
_Peromyscus musculus_, Allen and Chapman, Bull. Amer. Mus.
Nat. Hist., 9:203, June 16, 1897.
_Baiomys musculus_, Mearns, U. S. Nat. Mus. Bull., 56:381,
April 13, 1907.
_Range._--Dry, tropical, southwestern parts of state.
_Specimens examined_, 41: nos. 100366-100406; distributed by
localities as follows: 1-3/4 mi. S TacAimbaro, 5,700 ft., 1; 1 mi. E
and 2-1/2 mi. S TacAimbaro, 4,700 ft., 11; 4 mi. S and 1 mi. E
TacAimbaro, 10; 1 mi. E and 5 mi. S TacAimbaro, 4,000 ft., 1; 6 mi. S
TacAimbaro, 4,000 ft., 4; 1 mi. E and 6 mi. S TacAimbaro, 4,000 ft., 14.
_Remarks._--Osgood (1909:258) has recorded this subspecies also from
La Huacana and La Salada. Three adult males with much worn teeth
weigh, in grams, 8.3, 9.3, and 10.8. Weights of three adult,
nonpregnant, females are 8.1, 9.4, and 9.7. None of our 13 females was
pregnant.
=Peromyscus maniculatus labecula= Elliot