Part 14

Table headings: A: Number averaged or catalogue No. B: Sex C: Total length D: Length of tail E: Length of hind foot F: Basilar length G: Length of nasals H: Zygomatic breadth I: Mastoid breadth J: Alveolar length of maxillary tooth-row

========================================================================= LOCALITY A B C D E F G H I J ------------------------------------------------------------------------- Vall. Mex. 3 200 114 22.0 17.6 9.3 12.0 10.7 3.7 PAitzcuaro 5 170 101 20.6 16.7 8.7 11.6 10.6 3.7 Zamora 100215 153 82 19.0 15.9 7.8 10.9 10.3 3.5 Zamora 100275 184 101 21.0 16.5 8.0 11.1 10.4 3.6 TacAimbaro 5 159 91 19.4 15.5 8.0 10.5 9.6 3.3 Vall. Mex. 3 184 103 21.0 16.6 8.7 11.4 10.6 3.6 PAitzcuaro 5 182 104 21.6 16.8 8.6 11.6 10.5 3.6 Zamora 5 159 91 19.0 16.0 8.4 11.4 10.0 3.5 TacAimbaro 5 149 87 18.6 14.9 7.7 10.4 9.5 3.4 ------------------------------------------------------------------------- Note: = Male and = Female.

=Reithrodontomys fulvescens inexspectatus= Elliot

Fulvous Harvest Mouse; Spanish, RatA cubedn Moreno

Rhithrodontomys inexspectatus Elliot, Field Columb. Mus. zoAśl. ser., 3:145, February, 1903, type from PAitzcuaro, MichoacAin.

Reithrodontomys fulvescens toltecus, Howell, N. Amer. Fauna, 36:51, June 5, 1914, part.

Range.--Central MichoacAin; limits of range unknown.

Specimens examined, 15: nos. 100278-100292, distributed by localities as follows: 3 mi. N PAitzcuaro, 6,800 ft., 6; 3 mi. NW PAitzcuaro, 6,700 ft., 3; 2 mi. W PAitzcuaro, 7,600 ft., 2; 2 mi. W PAitzcuaro, 7,700 ft., 4.

Remarks.--Howell (1914:51) made R. inexspectatus Elliot a synonym of R. f. toltecus and perhaps we should follow him in this. The facts are that in our large series from the vicinity of PAitzcuaro, the upper parts are more reddish than in R. f. toltecus from the valley of MA(C)xico, and more reddish than in R. f. tenuis if we correctly interpret Howell's (op. cit.,:45) description of R. f. tenuis. In the color of the underparts the series is, to us, indistinguishable from topotypical toltecus and therefore has more reddish underparts than R. f. tenuis, as we know R. f. tenuis, from Howell's (loc. cit.) description. In size, the series from PAitzcuaro is intermediate between R. f. tenuis and R. f. toltecus but nearer the latter.

=Reithrodontomys chrysopsis chrysopsis= Merriam

Volcano Harvest Mouse; Spanish, RatA cubedn Dorado

Reithrodontomys chrysopsis Merriam, Proc. Biol. Soc. Washington, 13:152, June 13, 1900, type from Mount Popocatepetl, MA(C)xico.

Reithrodontomys chrysopsis chrysopsis, Howell, N. Amer. Fauna, 36:66, June 5, 1914.

Range.--PatambAin, 1,200 feet elevation as now known.

Remarks.--Howell (1914:68) lists nine specimens from PatambAin. We have not examined these specimens. He listed at the same time seven of the specimens from TancA-taro, but we have found specimens from TancA-taro to be of another subspecies, R. c. seclusus. Accordingly, we are in doubt as to whether the mice from PatambAin are subspecies chrysopsis, seclusus, or an unnamed subspecies and our use here of the name Reithrodontomys chrysopsis chrysopsis for them is, of course, provisional.

=Reithrodontomys chrysopsis seclusus= Hall and Villa

Volcano Harvest Mouse; Spanish, RatA cubedn Dorado

Reithrodontomys chrysopsis seclusus Hall and Villa, Proc. Biol. Soc. Washington, 62: 163, August 23, 1949, type from Mount TancA-taro, 7,800 ft., MichoacAin.

Reithrodontomys chrysopsis chrysopsis, Howell, N. Amer. Fauna, 36:66, June 5, 1914, part.

Range.--Known only from Mount TancA-taro, from 6,000 feet elevation up to at least 11,000 feet.

Specimens examined, 22: nos. 51407-51411, 52110-52126, all from Mount TancA-taro, distributed by altitude as follows: 6,000 ft., 5; 7,800 ft., 10; 10,500 ft., 1; 11,000 ft., 1; no altitude recorded, 5.

Remarks.--The 22 specimens in the Chicago Natural History Museum are remarkably uniform in color in spite of differences in age; 17 are so young as to have the first upper molar only slightly worn and 5 are adults. In preparing the original description of R. c. seclusus, known only from specimens in the summer pelage, comparison of color was made with only the winter pelage of R. c. chrysopsis and it was pointed out that the differences noted in color between the two subspecies might be seasonal rather than subspecific. A summer specimen of R. c. chrysopsis (K. U. 17980, taken on June 15, 12 km. ESE Amecameca, 11,500 ft.), is available as the present account is being written. In direct comparison with the original material of R. c. seclusus, all in summer pelage, and in comparison with a specimen of R. c. chrysopsis in winter pelage (January 18), from 30 km. E Amecameca, the summer pelage of no. 17980 is more blackish than the winter pelage and therein more closely resembles that of R. c. seclusus. The same is true of the more sparsely haired tail. The ears, however, are blackish as in winter-taken R. c. chrysopsis. This feature and also the large size and different cranial proportions of specimen no. 17980 are in accordance with the differences between R. c. chrysopsis and R. c. seclusus as recorded in the original description of the latter.

=Baiomys taylori analogus= (Osgood)

Northern Pygmy Mouse; Spanish, RatA cubedn Pigmeo NorteA+-o

Peromyscus taylori analogus Osgood, N. Amer. Fauna, 28:256, April 17, 1909, type from Zamora, MichoacAin.

Baiomys taylori analogus, Miller, N. Amer. Land. Mamm., 1911, p. 137, December 31, 1912.

Range.--Northwestern part of state.

Specimens examined, 35: nos. 100331-100365, distributed by localities as follows: 8 mi. N Zamora, 5,500 ft., 2; 11 mi. W Zamora, 5,750 ft., 1; 6-1/2 mi. W Zamora, 5,950 ft., 2; 4 mi. W Zamora, 5,450 ft., 1; 3 mi. NW PAitzcuaro, 6,700 ft., 21; 3 mi. N PAitzcuaro, 6,800 ft., 5; 2 mi. W PAitzcuaro, 6,700 ft., 3.