E.J. Miller 1940 Dipodomys merriami March 19 2450'+ Coopers' Well, 17 mi. S Marthan, Brewster Co., Texas. Taked a male in mouse trap set on sandy earth among creosote and mesquite brush, flat country. Taken at night. ?in same habitat also took Dipodomys merriami, crossed out Perognathus penicillatus and Peromyscus eremicus. March 24 400'+ elev. 38 mi. S of Nuevo Laredo in Nuevo Leon, Mexico. Took a ? in trap, probably immature, no embryos. ?in habitat of open brush on rocky ground. Took Peromyscus leucopus, and Perognathus merriami nearby. May 17 1900 m. 1 mi. N Chicalote, Aguascalientes. Took one ? (large) (2 embryos) of this species in an almost open field with a few small bushes nearby. This specimen had a white tip to its tail, resembling D. spectabilis, which also lives here. Nearby, in addition, I took Perognathus hispidus, Perognathus flavus, and Dipodomys gordii. May 19 2 mi. NW San Luis Potosi, San Luis Potosi. Took one ? (no embryos) in a field of Maguey plants; soil sandy and light gray - brown color. May 20 1 mi. W Hacienda la Parada, 20 mi. NW San Luis Potosi, San Luis Potosi. Took 4 females of this species in traps set on rocky soil among brush and cacti. Country of low hills, vegetation of medium thickness. May 24 11 mi. NW Cedral, San Luis Potosi. Took 3 ?, 3 ? of this species in traps set on rocky soil [illegible]