While working over long series of the various forms of P. smintheus, con- tained partly in the Canadian National Collection and partly loaned for study from various sources, I came across two male specimens, received in exchange several years ago from R. F. Sternitzky of San Francisco, and collected at Castle Lake, Siskiyou Co. Calif., a rather isolated locality at an altitude of about 6000 ft. in the mountains opposite Mt. Shasta to the west, and close to Mt. Bradley. As these specimens showed several unusual characters I at once got in touch with Mr. Sternitzky and other California collectors and was able to secure a good series for study; these specimens had apparently all been collected by Messrs. L. Martin and W. B. Davis and were recorded by the latter (1932, Bull. S. Calif. Acad. Sci. XXX, 93) under the name of sminthcus var. magnus Wgt. As these additional specimens show in the main the same distinguishing features that had been noted in the original two, I believe that a good race is indicated, and, in spite of the fact that 1 have been recently rather critical of certain European authors for establishing races of smintheus on inadequate characters, 1 venture to describe it,taking much pleasure in naming it after the enthusiastic collector from whom the specimens were first received.