JESimpson,1938 page 2. Peroqpathus intermedius, continued. 50+ ft., Punta Peñasca, Sonora April 1, 1938, continued. 50 ft., apart; the former of very dark pelage and the latter, of light pelage. A small cut (not big enough to be called an arroyo) 10-12 ft. wide was between the traps which lay:(just barely worth mentioning perhaps); the one catching the dark in dark lava; the trap of light mouse in lighter colored lava. April 2, 1938. σ7108 taken on windward side of above-ment- ioned lava hill. 50+ ft., Cerro La Cholla, 6 mi. wnw Punta Peñasca, Sonora April 3, 1938. σ7109 and σ7110 caught in granite hills near bay of Gulf among ocotillo, creosote, and cholla. 1400+ ft., Imune Sonoita, Sonora. April 10, 1938 no emb. σ7140 and ♀141 caught among saquero, pitayo, ocotillo, palo verde, and some cholla. Cheek-pouch con- tents saved. 1775+ ft., 8 mi. s. San Luis, 34 mi. nw. Caborca, Sonora. April 12, 1938. no emb. Seven(σ7145-48; ♀149-51; cheek-pouch contents saved) among palo verde and mesquite in rocky hills(the vegetation much heavier here than on level desert, also much saquero, pitayo, ocotillo, nopal, and barrel-cactus.