E.V. Miller 1940 17 General Account. April 10 (cont.) The soil is partly fine light brown sand and partly covered with a layer of thin dried mud - due to a flood about a month ago. We are camped on the east side of the pond, which is on the east side of the town. after dark I set 50 live traps for mice in a field southeast of town. Set one steel trap for a wood rat. April 11. Caught one ♀ Neotoma micropus and 2 ♂ Peromyscus leucopus (one immature). April 12. Set 10 Schuyler no 1's for rats and 50 M. Specials for mice, partly along a brush fence around a ploughed field, last night. Caught 3 ♀ and 2 ♂ Neotoma micropus, 3 ♀ and 5 ♂ Perognathus merriami, and 1 ♀, 2 ♂ Peromyscus leucopus. Away from the field I caught practically none of the mice. The weather was cloudy and cool today in contrast to the heat of yesterday. Set 33 M. Specials along same fence and field tonight. April 13 Caught 2 ♂, 1 ♀ Peromyscus leucopus, 4 ♂ Perognathus merriami, and 1 ♂ Rheithroclantraps sp. We expect to leave this camp today. We drove on through Reynosa and towards Monterrey. I set out 50 M Specials in a low hill near the road. The soil was covered in some places with dark gray rock and in others with reddish colored rocks. The plant growth was thorny brush. About dark I set out 50 live mouse traps. I found no wood rats nests. The weather is cool and clear. Before dark I shot 2 lizards (Callisaurus?) and a ♂ Verdin. The latter was on a nest, but there were