An Annotated Check List of the Mammals of Michoacan, Mexico Part 10

Blackish Mouse; Spanish, Raton Obscuro

_Peromyscus melanophrys zamorae_ Osgood, Proc. Biol. Soc.

Was.h.i.+ngton, 17:65, March 21, 1904, type from Zamora, Michoacan; N. Amer. Fauna, 28:187, April 17, 1909.

_Range._--Northern part of state.

_Remarks._--Insofar as we know, this mouse has been taken in Michoacan only at the type locality.

=Peromyscus bandera.n.u.s bandera.n.u.s= Allen

Tarascan Mouse; Spanish, Raton Tarasco

_Peromyscus bandera.n.u.s_ 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 bandera.n.u.s 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 Zitacuaro, and Osgood (_loc. cit._) thought that those from both Los Reyes and Zitacuaro were not _P. b. vicinior_ but possibly _P. b. bandera.n.u.s_. 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.

bandera.n.u.s_) but so far we know never did this before his death.

=Peromyscus bandera.n.u.s vicinior= Osgood

Tarascan Mouse; Spanish, Raton Tarasco

_Peromyscus bandera.n.u.s vicinior_ Osgood, Proc. Biol. Soc.

Was.h.i.+ngton, 17:68, March 21, 1904, type from La Salada, Michoacan.

_Range._--Hot valleys of western part of state.

_Specimens examined_, 53: nos. 100543-100592, 100594, 100596, 100599, distributed by localities, from Tacambaro, 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.

_Remarks._--There is much variation in size in our animals. The three largest males weigh, in grams, 67.5, 50.3, 48.9 and corresponding figures for the two heaviest, nonpregnant, females are 53.5 and 48.3 grams. Of the 14 adult females, only one was recorded as having embryos; it had two embryos each 24 millimeters in crown to rump length. Where we trapped among big boulders and among the roots of trees of the genus _Ficus_, _Peromyscus bandera.n.u.s vicinior_ was the only species of the genus taken. _Peromyscus boylii evides_ occurred in the less tropical vegetation, alt.i.tudinally and zonally above _P.

b. vicinior_.

=Peromyscus melanotis= Allen and Chapman

Black-eared Deermouse; Spanish, Raton Montanero

_Peromyscus melanotis_ Allen and Chapman, Bull. Amer. Mus.

Nat. Hist., 9:203, June 16, 1897, type from Las Vigas, 8,000 ft., Veracruz.

_Range._--Higher mountains throughout state.

_Specimens examined_, 33: nos. 51397-51401, 52142-52166, 52172-52174, from Tancitaro.

_Remarks._--The elevation recorded on the label of one specimen is 9,000 feet and on the labels of other specimens is no lower than 10,500 feet and on some is as high as 12,000 feet. The elevation of capture is not recorded for two specimens. Osgood (1909:112) previously recorded the species from 12,000 feet elevation on Mount Tancitaro.

=Oryzomys couesi regillus= Goldman

Tropical Rice Rat; Spanish, Rata Arrocera Tropical; Tarascan word for rat is Jeyaquihuiri (Hayakewire), or Sarisi

_Oryzomys couesi regillus_ Goldman, Proc. Biol. Soc.

Was.h.i.+ngton, 28:129, June 29, 1915, type from Los Reyes, Michoacan; Goldman, N. Amer. Fauna, 43:37, September 23, 1918.

_Range._--Plateau region of Northeast Michoacan.

_Specimens examined_, 22: nos. 100601-100622, distributed by localities as follows: 1 mi. N Zamora, 5,450 ft., 2; 4 mi. W Zamora, 5,450 ft., 1; 4 mi. S Patzcuaro, 7,800 ft., 1; 1 mi. E and 6 mi. S Tacambaro, 4,000 ft., 18.

_Remarks._--The tooth-row is longest in the specimens from Zamora, shortest in those from Tacambaro and intermediate in length in the one specimen from Patzcuaro. The shorter tooth-row at the lower elevation (Tacambaro), we interpret as intergradation with _Oryzomys couesi mexica.n.u.s_. In color the specimens from Tacambaro are, to us, indistinguishable from those from Zamora and Patzcuaro but the color is notably darker than that of specimens from the vicinity of Apatzingan which are here referred to the subspecies _Oryzomys couesi mexica.n.u.s_. The largest male, fully adult from Zamora weighs 82.9 grams and the largest one from the vicinity of Tacambaro weighs 73.6 grams.

=Oryzomys couesi mexica.n.u.s= Allen

Tropical Rice Rat; Spanish, Rata Arrocera Tropical

_Oryzomys mexica.n.u.s_ Allen, Bull. Amer. Mus. Nat. Hist., 9:52, March 15, 1897, type from Hacienda San Marcos, 3,500 ft., Tonila, Jalisco.

_Oryzomys couesi mexica.n.u.s_, Goldman, N. Amer. Fauna, 43:33, September 23, 1918.

_Range._--Semitropical and tropical western part of the state.

_Specimens examined_, 14: nos. 52018-52023, 52063-52070, from 1,040 ft., 10 kms., W Apatzingan.

_Remarks._--These specimens are notably paler and have shorter tooth-rows than those referred to _O. c. regillus_.

=Oryzomys fulvescens lenis= Goldman

Fulvous Rice Rat; Spanish, Rata Arrocera Pigmea

_Oryzomys fulvescens lenis_ Goldman, Proc. Biol. Soc.

Was.h.i.+ngton, 28:130, June 29, 1915, type from Los Reyes, Michoacan; N. Amer. Fauna, 43:91, September 23, 1918.

_Range._--Semitropical parts of state.

_Remarks._--The type and one topotype so far as we know are the only specimens of this species to have been obtained from the state. The size is hardly larger than that of a large _Reithrodontomys_.

=Sigmodon melanotis= Bailey

Fulvous Cotton Rat; Spanish, Rata AlG.o.donera Leonada