Remarks.—Our one specimen from 9 miles southeast of Pátzcuaro was caught in a small steel trap set at a meat bait.
Microtus mexicanus salvus Hall
Mexican Meadow Mouse; Spanish, Metorito
Microtus mexicanus salvus Hall, Univ. Kansas Publ., Mus. Nat. Hist., 1:426, December 24, 1948, type from Mount Tancítaro, 11,400 ft., Michoacán.
Range.—Known only from Mount Tancítaro at elevations of 7,800 to 11,400 feet.
Specimens examined, 14: nos. 51412, 51413, 52093, 52095-52099, 52101, 52103-52107, all from Mount Tancítaro, distributed by elevations as follows: 11,400 ft., 8; 11,000 ft., 2; 7,800 ft., 1; no elevation recorded, 3.
Microtus mexicanus fundatus Hall
Mexican Meadow Mouse; Spanish, Metorito
Microtus mexicanus fundatus Hall, Univ. Kansas Publ., Mus. Nat. Hist., 1:425, December 24, 1948, type from 3½ mi. S. Pátzcuaro, 7,900 ft., Michoacán.
Range.—Central part of state.
Specimens examined, 59: nos. 100636-100694, distributed, with reference to the town of Pátzcuaro, as follows: 3½ mi. S, 7,900 ft., 9; 4 mi. S, 7,800 ft., 16; 5 mi. S, 7,800 ft., 26; 9 mi. SE, 8,000 ft., 8.
Remarks.—Of the 23 females, only one was pregnant. It had two embryos. Average and extreme weights of ten adults of each sex, are: males, 37.8 (31.5-48.2); females, 38.0 (31.0-48.6) grams. Our specimens were trapped in well-defined runways beneath a rail fence where there was a growth of grass sufficient to make a cover for the runways. Bailey (1900:54-55) has recorded under the name Microtus mexicanus phaeus specimens from Nahuatzin which may be referable to the subspecies M. m. fundatus.