Hoffmeister 1942 Peromyscus maniculatus May 17 Walker Cr, 4 mi. SW Blanca, 5200 ft, Inyo Co., Calif. This species apparently is the most abundant rodent on the flat sloping off from the base of the eastern Sierra foothills in the Artemisia, Chrysothamnus, Lupinus association. 50 traps set in this association yielded 29 of this species and no other mammals. May 19 In running my trap line this a.m. at 6:30 (war time; 5:30 a.m. Standard Time), I found a P. maniculatus still alive although the bar of the trap was across the middle of its back. I judge it had been caught (and thus abroad) less than 15 minutes before. It had been daylight for about 1 hour and the sun had been up for quite a few minutes. May 21 At 5:45 a.m. (standard time), 4 specimens where found still alive in the traps, although all were caught squarely across the back. At this time the sun had been up for at least ½ hour. This would seem to indicate that maniculatus is abroad during the daylight hours of the morning. I found that a P. boylii, which was caught in camp, and caught squarely across the back died in about 15 minutes. May 29 Cought an adult in camp early in the evening and before the animal was dead, I noted its eye shine. It seemed identical with that of P. boylii. It has a very definite shine, being a pale lemon color.