Quest 1948 Peromyscus truei June 12 La Laguna 6200 ft, Sierra de la Laguna, Baxi Calil. Two caught last night in Museum special traps baited with walnut. Traps were set in canyon where the stream exits the flat, and set among willow, grass and large granite boulders. North of the specimens (# 350, 351) had embryos. These were caught in the same habitat as two Peromyscus eremicus. All traps were set within 5 feet of running water. Peromyscus truei have also been caught near other springs and streams about La Laguna by others of this group. June 13 Lane Tratini. Two males caught in same trap line as above last night. One was so badly eaten by ants it had to be abandoned. Both were caught within 4 feet of the running water under dense willows and near green grass. No Peromyscus eremicus caught in trap line last night.