f. dh ->3 Vol. 39, pp. 67-70 PROCEEDINGS July 30, 1926 BIOLOGICAL SOCIETY OF W^/AShrti^glTON '%^ THE DESCRIPTION OF A NEW SUBSPECIES OF PEROGNATHUS FROM LOWER CALIFORNIA WITH A SHORT DISCUSSION OF THE TAXONOMIC PO-SITION OF OTHER PENINSULAR MEMBERS OF THIS GENUS. BY LAURENCE M. HUEY. In diagnosing a collection of mammals recently obtained for the San Diego Society of Natural History at San Felipe, Lower California, Mexico, the writer was confronted with the task of identifying specimens of four groups in the genus Perognathus, which were all trapped on common ground in the immediate vicinity of the beach line. Three of the forms are assignable to the hombydnus, haileyi and penicillatus groups, and the fourth, with which the present paper deals, seems most nearly related to Perognathus arenarius, described by Merriam in 1894 from the south central part of Lower California. Subsequent writers' have designated P. arenarius Merriam as a subspecies in the penicillatus group, naming it Perognathus penicillatus arenarius. In view of the fact that in my collecting at San Felipe six ex-amples referable to Perognathus penicillatus angustirostris were captured in the same place as the arenarius specimens, and since it is well known that two races of the same species can not occupy the same ground, it seems to me that P. arenarius can not be given subspecific standing under penicillatus. I therefore pro-pose for the San FeHpe specimens the name: Perognathus arenarius albescens, subsp. nov. LIGHT-COLORED POCKET MOUSE. Type. — From San Felipe, Lower California, Mexico; No. 5103, CoUec-lEUiot, Field Columb. Mus., publ. 79, zool. ser., vol. 3, p. 221. June, 1903. Osgood, Proc. Biol. Soc. Washington, vol. 20, p. 20. Feb. 23, 1907. Townsend, BuU. Amer. Mus. Nat. Hist., vol. 31, p. 121. June 14, 1912. Nelson and Goldman, Proc. Biol. Soo. Washington, vol. 36, p. 159. May 1, 1923. 19— Proc. Biol. Soc. Wash., Vol. 39, 1926. (67)
The description of a new subspecies of Perognathus from Lower California with a short discussion of the taxonomic position of other peninsular members of this genus
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