Hooper (1946:397) has shown that the genus Platygeomys is not generically distinct from the earlier named Cratogeomys. From independent study of specimens not examined by Hooper we have satisfied ourselves that he is correct in synonymizing Platygeomys under Cratogeomys. Average and extreme weights of 4 of each sex from 2 to 5 miles south of Pátzcuaro are: ♂, 683 (562-819); ♀, 558 (438-707) grams.
Cratogeomys angustirostris (Merriam)
Plains Pocket Gopher; Spanish, Tuza Llanera; Tarascan, Cúmu (Cŏmŏ)
Platygeomys tylorhinus angustirostris Merriam, Proc. Biol. Soc. Washington, 16:81, May 29, 1903, type from Patambán, 10,000 ft., Michoacán.
Platygeomys angustirostris, Goldman, Jour. Mamm., 20:90, February 14, 1939.
Range.—Known only from the type locality.
Cratogeomys varius (Goldman)
Plains Pocket Gopher; Spanish, Tuza Llanera; Tarascan, Cúmu (Cŏmŏ)
Platygeomys varius Goldman, Jour. Mamm., 20:90, February 14, 1939, type from Uruapan, about 6,000 ft., Michoacán.
Range.—Known only from the type locality.
Remarks.—Specimens from localities intermediate between Uruapan, the type locality of C. varius, and the known localities of occurence of Cratogeomys gynmurus imparilis are much needed to ascertain if C. varius is specifically different from C. g. imparilis, or merely subspecifically different.