. Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees . Mammals; Mammals; Trees; Trees; Natural history; Natural history. 436 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. PEROMYSCUS EREMICUS FRATERCULUS (Miller). SAIf DIEGO DESERT MOTTSE. Sitorhysfrateradus Millee, American Naturalist, XXVI, Mar., 1892, pp. 261,264 (origi- nal description). Sitomys herronii Rhoads, American Naturalist, XXVII, pp. 832, 833, Sept. 1, 1893 (type-locality, San Bernardino
. Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees . Mammals; Mammals; Trees; Trees; Natural history; Natural history. 436 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. PEROMYSCUS EREMICUS FRATERCULUS (Miller). SAIf DIEGO DESERT MOTTSE. Sitorhysfrateradus Millee, American Naturalist, XXVI, Mar., 1892, pp. 261,264 (origi- nal description). Sitomys herronii Rhoads, American Naturalist, XXVII, pp. 832, 833, Sept. 1, 1893 (type-locality, San Bernardino Valley, southern California). Sitomys herroni nigellus Riioads, Proc. Acad. Nat. Sci. Phila., 1894, pp. 257, 258 (type-locality, West Cajon Pass, San Bernardino Mountains. California). [Peromj/scMs]/ratercitZus, Trouessart, Catal. Mam., Ft. 3,1897, p. 515.âElliot, Field Col. Mus., Zool. Ser.,II, 1901, p. 136 (Synop. Mam. N. Am.); IV, 1904, p. 1§4 (Mam. Mid. Am.). Peromyscus fratercvZus, Millee and Rehn, Proc. Bost. Soc. Nat. Hist.,XXX, No. 1, Dec. 27, 1901, p. 73 (Syst. Results Study N. Am. Mam. to close of 1900). Type-locality.âDulzura, San Diego County, California. (Type in the collection of Gerrit S. Miller, jr.) GeograpJdcal range.âSonoran Zone of the Pacific Coast Tract of southern and Lower California. Description.âLarger and darker than typical Peromyscus eremicus; underparts with a muddy staining, whereas the more eastern forms of P. eremicus have the under surface pure white unless there is a pectoral spot of cinnamon. Its general resem- blance to P. californicus, except in size, suggested the name fraterculus. As stated hj Mr. Rhoads, in the American Naturalist for Septeihber, 1893, "Mr. Miller, who described fraterculus as a full species, now con- siders it a 'dark coast form of eremicus.'" The coloration, as a whole, is darker than in the other subspecies of P. eremicus; â the upper surface being liberally mixed with black-tipped hairs; under surfa
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