_Range._--Northern part of state. _Specimens examined_, 42: nos. 100448, 100473-100483, 100485-100509, 8700, 8702, 8703, 8896, 8897, distributed by localities as follows: 8 mi. N Zamora, 5,500 ft., 2; 11 mi. W Zamora, 5,750 ft., 11; 6-1/2 mi. W Zamora, 5,950 ft., 4; 6 mi. W Zamora, 5,950 ft., 4; Rio Duaro, 9 mi. E Zamora, 5,500 ft., 1; 3 mi. N Pátzcuaro, 6,800 ft., 1; 3 mi. NW Pátzcuaro, 6,700 ft., 10; 1-1/2 mi. NW Pátzcuaro, 6,700 ft., 1; 2 mi. W Pátzcuaro, 6,700 ft., 3; Pátzcuaro (Chicago Nat. Hist. Mus.), 5. _Remarks._--The ear measured from the notch is shortest, 19 (18-21), at Zamora, intermediate, 21 (19-23), at Pátzcuaro, and longest, 21.8 (20-23), at the type locality of _gratus_ in the Valley of México. =Peromyscus melanophrys zamorae= Osgood Blackish Mouse; Spanish, Ratón Obscuro _Peromyscus melanophrys zamorae_ Osgood, Proc. Biol. Soc. Washington, 17:65, March 21, 1904, type from Zamora, Michoacán; N. Amer. Fauna, 28:187, April 17, 1909. _Range._--Northern part of state. _Remarks._--Insofar as we know, this mouse has been taken in Michoacán only at the type locality. =Peromyscus banderanus banderanus= Allen Tarascan Mouse; Spanish, Ratón Tarasco _Peromyscus banderanus_ Allen, Bull. Amer. Mus. Nat. Hist., 9:51, March 15, 1897, type from Valle de Banderas, Nayarit; Osgood, Jour. Mamm., 26:300, November 14, 1945. _Peromyscus banderanus vicinior_ Osgood, N. Amer. Fauna, 28:209, 210, April 17, 1909, part. _Range._--Northern and eastern parts of state. _Remarks._--Specimens from Los Reyes referred to the subspecies _P. b. vicinior_ by Osgood (1909:209-210) were later characterized by Osgood (1945:300) as agreeing with specimens from Zitácuaro, and Osgood (_loc. cit._) thought that those from both Los Reyes and Zitácuaro were not _P. b. vicinior_ but possibly _P. b. banderanus_. He had this material set aside for further study when he showed it to one of us (Hall) in 1945. It was his intention to revise the entire species (_P. banderanus_) but so far we know never did this before his death. =Peromyscus banderanus vicinior= Osgood Tarascan Mouse; Spanish, Ratón Tarasco _Peromyscus banderanus vicinior_ Osgood, Proc. Biol. Soc. Washington, 17:68, March 21, 1904, type from La Salada, Michoacán. _Range._--Hot valleys of western part of state. _Specimens examined_, 53: nos. 100543-100592, 100594, 100596, 100599, distributed by localities, from Tacámbaro, as follows: 2-1/2 mi. S and 1 mi. E, 4,700 ft., 21; 4 mi. S and 1 mi E, 4,500 ft., 10; 6 mi. S, 4,000 ft., 6; 6 mi. S and 1 mi. E, 4,000 ft., 16.