3.1, 3.0; interparietal breadth, 4.3. 4.6, 4.7.

Remarks.—The subspecific name cockrumi is proposed in recognition of Dr. E. Lendell Cockrum's important contribution to our knowledge of the mammals of Kansas. Dr. W. Frank Blair recently suggested to me that the two specimens examined by him from Kansas (the one from Ellsworth County and the one here designated as holotype) should not be referred to Perognathus flavescens copei Rhoads, as Cockrum (Univ. Kansas Publ., Mus. Nat. Hist., 7:146, August 25, 1952) had done, because copei is paler, instead of darker, than P. f. flavescens. It was Dr. Blair's suggestion which lead me to realize that the subspecies in south-central Kansas lacked a name.

Through the courtesy of Miss Viola S. Schantz I have examined three of the four specimens from Cairo, Kansas, that Osgood (N. Amer. Fauna, 18:21, September 20, 1900) referred to Perognathus flavescens before any subspecies of that species had been recognized. The specimens from Cairo are intermediate in color, as they are also in geographic position, between P. f. flavescens from western Kansas and P. f. cockrumi from south-central Kansas but show more resemblance to the latter and therefore are referred to P. f. cockrumi. The specimens, excepting the three from Cairo, are in the Museum of Natural History at the University of Kansas.

Transmitted August 23, 1954.

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