E.V. Miller 1940 24. General Account Peromyscus melanotis, In the afternoon we drove on to the next camp at El Pedregal, 2.5 mi. W Tlalpan, D.F. Here I set out 85 m. specials and 47 live traps, all for mice. I took 9 ?, 8 ? Peromyscus boylii, 5 in the live traps. The habitat was fields of low grass and rocky lava beds with a medium thick growth of nopal cactus, small oak trees, grass, and other small herbaceous plants. From here we drove on through Toluca to a location, 10,000+ ft. 15 mi. SW Toluca, Mexico. In the late afternoon I set out 85 m. specials and 50 live traps. May 7 Took nothing in many live traps; in the others 7 ?, 5 ? Peromyscus maniculatus and 1 ? Rheithrodonmys megalotis. We saw no bats last night. The weather is cool and clear today. My traps were set under small pines, Baccharis sp? and along the creek. The mice were all taken very near the creek. The soil is sandy and light yellow-gray in color. The pines are small and scattered and the brush is not thick. In the afternoon we drove on up to the big crater of the Nevado de Toluca. There are two small lakes in the crater, which is above timber-line. The slopes are covered with rocks and bunch-grass. We drove back down the road to about 12,000+ ft., where we camped in a deserted "chalet." The country here consisted of steep slopes covered with bunch-grass and a thin growth of pines 70-100 ft. high.