Bailey (N. Amer. Fauna, 39:101, November 15, 1915) identified as Thomomys talpoides clusius two specimens (66465 and 66523 BS) from Pass (= Parkman) and one specimen (66464 BS) from Dayton, in Wyoming. We have examined these specimens and find that they lack the broad braincase and narrow nasals of clusius and in these and in other features the three specimens resemble T. t. caryi and T. t. bullatus more than they resemble any other named kinds. Although structurally, and in color, intermediate between the two subspecies named immediately above, the specimens show greater resemblance (large size and narrow braincase) to the latter and are referred by us to Thomomys talpoides bullatus.
Thomomys talpoides clusius Coues
Bailey (N. Amer. Fauna, 39:102, November 15, 1915) identified as Thomomys talpoides bullatus an adult male (147347 BS) from the J. K. Ranch, 5900 ft., on Meadow Creek, Wind River, Wyoming [= Wind River of Bailey, loc. cit.] and a young female (168666 BS) from Sage Creek, 8 mi. NW Fort Washakie, Wyoming. The rosaceous tone of these pale individuals is more as in some populations of T. t. ocius and T. t. clusius to the southward. Also, the skull of the male, although large, is distinctly narrower than in T. t. bullatus and we think shows the influence of the T. t. tenellus stock. All features considered, we refer the specimens to T. t. clusius.
Thomomys talpoides glacialis Dalquest and Scheffer
Vernon Bailey (N. Amer. Fauna, 39:119, November 15, 1915) listed 19 specimens from Roy, Washington, as Thomomys douglasi yelmensis Merriam. Our examination of 26 specimens (205039-205051, 205072-205077, and 206545-206551 BS) labeled as "Roy," and presumably including those listed by Bailey (loc. cit.), leads us to identify all 26 as Thomomys talpoides glacialis on the basis of widely spreading zygomatic arches and decidedly ochraceous hue of underparts.
Geomys bursarius jugossicularis Hooper
Seven skins with skulls (35104/47369-35110/47375 BS) from Las Animas, Colorado, probably formed the basis for Cary's (N. Amer. Fauna, 33:129, August 17, 1911) record of Geomys lutescens from that locality. Comparison of the material reveals that the animals are referable instead to the later named subspecies, Geomys lutescens jugossicularis Hooper (Occas. Papers Mus. Zool., Univ. Michigan, 420:1, June 28, 1940), on the basis of (1) more reddish color, (2) deeper zygomatic plate, (3) shorter jugal as expressed as a percentage of the length of the part of the zygomatic arch anterior to the jugal, and (4) larger area of inner face of jugal exposed when skull is viewed from directly above. Possibly it is noteworthy that the specimens from Las Animas are larger than Hooper's holotype and one topotype; this larger size is indicative of intergradation with G. b. lutescens as represented by the specimens examined by us from Pueblo.
Our examination of an adult female, No. 128242 BS and a juvenal female, No. 128243 BS, from 15 mi. E Texline, Texas, recorded by Bailey (N. Amer. Fauna, 25:132, October 24, 1905) under the name Geomys lutescens reveals that the specimens are referable to Geomys bursarius jugossicularis instead of to Geomys bursarius major on the basis of (1) mastoid part of tympanic bulla more inflated posteriorly, (2) narrowness of frontals between posterior tongues of the premaxillae and, (3) lighter color.
Liomys irroratus irroratus Gray
When Hooper and Handley (Occas. Papers Mus. Zool., Univ. Michigan, 514:1-34, October 29, 1948) published a revised map (op. cit.:3) showing the geographic distribution of the subspecies of Liomys irroratus they did not mention a specimen from Agusinapa, Guerrero, which inferentially from their map would be L. i. irroratus although it previously had been recorded as L. i. torridus by Goldman (N. Amer. Fauna, 34:55, September 7, 1911). We have examined the specimen (70228 BS), which retains the upper deciduous premolar. Its long foot (32 mm.) and broad cranium (13 mm.) are the bases for identifying the specimen as Liomys irroratus irroratus instead of L. i. minor, which is smaller.