E.V. Miller 1940 20 General Account. April 17 (cont.) Los Miradores, 1 mi. W Km. 619, 22 mi. N Linares, Tamaulipas. Here I shot 2 kinds of flycatchers and a kind of black jay. April 18 In my traps took 1 ? Onizymys sp.; 4 ?, 4? Peromyscus leucopus. We left this place and its innumerable ticks to drive on South. We stopped along the highway near Km 459, 9 mi. S Valles, San Luis Potosi. I set out 50 M. Specials and 10 Schuyler no.1's for the night. April 19 Took one? Peromyscus boylii, and shot a wren at camp. The habitat here was Bullhorn Acacia, small Palms, and thick high brush. My traps were set along a small rocky gulch. Benson got many more mice by setting his traps up the hillside. We drove on toward Mexico City, stopping in the mountains a short distance off the main highway near Km. 232 on the side road to Maguey Verde, state of Hidalgo. April 20 Our location for this morning is 7100+ ft. Maguey Verde, 8.5 mi. NE Zamapan, Hidalgo. I took one? Peromyscus sp.. My traps were set in brush along the edge of an old cornfield (50 M. Specials and 10 Schuyler no.1's). Delgadillo took more mice along a fence lined with Maguey plants. The habitat is small pine of 2 or more species, not pine being one, oaks with a light underbrush of Baccharis sp., Maguey or Century Plant, and other brush. In the afternoon I shot 2 Thryomanes bewicki, are "Red-backed" Junco, a Seelopsomus sp., and an Empidonax sp.. Benson shot a thrush - Hylocichla? sp. and an Aphelocoma sp. in addition. Last night I shot 2 ? Cteacius fuscus (late).