When Bole (Sci. Publ. Cleveland Mus. Nat. Hist., 5(2):6, December 4, 1937) named and described _Perognathus longimembris salinensis_, he listed as comparative material of _P. l. bangsi_, a specimen in the Museum of Comparative Zoology from Parker, Yuma Co., Arizona. There was some reason to doubt the identification of the specimen since it is the only record of occurrence of the subspecies from east of the Colorado River. There is no specimen of _Perognathus longimembris_ from Arizona in the Museum of Comparative Zoology. There is one specimen of pocket mouse (18213, a skin only) from 30 miles east of Parker. We think that this is the specimen seen by Bole because at one time according to the label, it had been identified as _Perognathus panamintinus_ [= _longimembris_] _bangsi_. If the identification of this skin-only had been made by means of Osgood's key (N. Amer. Fauna, 18:14-15, September 20, 1900), the animal would have "keyed out" to _P. longimembris_ because the total length is recorded on the label as 130. Seth B. Benson has subsequently examined the specimen. The label now bears in handwriting the name of _P. amplus pergracilis_ and is followed by Benson's initials as the identifier. Although we lack adequate comparative material, we consider the specimen to be _P. amplus pergracilis_ Goldman, because the skin answers well to the description of _P. a. pergracilis_ and because of the name currently on the label with Benson's initials. ~Perognathus longimembris panamintinus~ Merriam In the current literature, Californian specimens of the little pocket mouse stand identified as _Perognathus longimembris nevadensis_ from Oasis and vicinity of Benton Station (Grinnell, Univ. California Publ. Zool., 40:147, September 26, 1933). When one of us (Hall, Mammals of Nevada, p. 360, July 1, 1946) reported specimens from southwestern Nevada as _Perognathus longimembris panamintinus_ he did so on the basis of study of specimens which included those from Oasis (in the California Museum of Vertebrate Zoology) that he at that time (in ms.) identified as _P. l. panamintinus_. Those specimens from Oasis have the hair on the underparts white all the way to the base as also do specimens from Morans, 5000 ft. (29583/41638 BS), in contrast to the plumbeous underparts of _P. l. nevadensis_. It is on this basis that we identify specimens from the places mentioned above as _Perognathus longimembris panamintinus_. "Vicinity of Benton Station" as given by Grinnell (_loc. cit._) is interpreted to include Morans, Mono County. ~Dipodomys agilis martirensis~ Huey