Murray 1948 Perognathus baileyi Apr 16 Cerro Centinela, 300 ft., 13 mi. WSW Mexicali, Baja Calif. Caught 4 ♂♀ in 50 live traps set at an interval of 50 to 70 feet in a sandy wash which ran near to the base of the mountain. There was mostly ironwood and creosote with some other brush. With the mice caught 2 Perognathus and [illegible] Dipodomys merriami. May 16, 50 Triumpho, 1700 ft., Baja Calif. Set traps around the brush fence enclosing a corral, and also inside along a patch of ramajo ceniza. Caught 2♀ (see journal)