JESimpson, 1938. Nogales-Hermosillo Highway, Sonora May 12, 1938, continued. the records of the Mexican migration office; so we proceed for Nogales. Slept beside road after driving until much after dark. May 13, 1938 Drove into Nogales and went directly to the U.S. Consulate where Mr. Powell advised us to see the migration officials. The Jefe received us cordially and, when told of our dash to Nogales, said it had been unnecessary for us to return to Nogales until ready to cross the border for home. Dr. Benson returned to the U.S. Consulate and informed Mr. Powell of the results. Bought supplies and drove to: 2600+ ft., 20 mi. S. Santa Ana, Sonora. May 13, 1938, continued. On rocky soil among grass and mesquite set by moonlight 10 Shuyler and 7 wooden rat-traps; live-traps. also 50 May 14, 1938 Caught 12 Dipodomys spectabilis (307's with broken skulls; o -> 360-362 and ? 363, 364, 365, 366, 367, 368; check-pouch contained [illegible]), 2 Dipodomys merriami (one ju. and o -> 369), and 3 Perognathus penicillatus (one ju. and o -> 370, 371). Broke camp and drove toward Hermosillo; made camp: 2100+ ft., 45 mi. N. Hermosillo, Sonora. Set out 50 mousetraps and 7 wooden rat-traps. Shot a Mountain Towhee.