RIBBLE, D.O. 1987 Peromyscus californicus 34 30 Hastings Reservation, Monterey Co., Calif June 23 This AM on RC drift fence we dusted ♀ 1558, lact, st E-8.3 with BLUE-GREEN; ♀1551, 39g, up, st E-8.5 with PURPLE. This PM on GRID RC dusted ♀ 1364, 37.5g, lactura, st 5,12 with GOLDEN BROWN. June 25 This AM on GRID RC dusted ♀ 020, 60g, pregnant (palpable) with ORANGE powder at station 5,8. June 26 This AM on GRID RC dusted ♀ 030,47g, st 5,14 with BLUE-GREEN powder; ♀1979, 41.5g, st 9,18 with RED powder (just gave birth??) This AM on MC drift fence dusted ♀ # 0100, 18g, perf, lact, st W-13(out) with RED powder This PM on GRID RC we set up a dyadic encounter between lab ♀ 1511 and ♂ 0400 about 2m NW of station 5,14; 2300h. This am (1000h) ♀1511 was perforate, and her smear was exclusively cornified epithelial cells. This PM at 2200h she was still perforate, but her smear was a 50% cornified cells and 50% leukocytes. We introduced both mice into opposite sides of the enclosure, separated by a double wall of hardware cloth. We also dumped ~1/4 cup rolled oats in each side. June 27 0430h-returned to conduct the trial. ♂ 0400 was wedged between the two dividing walls of hardware cloth, so we had no choice but to grab each mouse, pull out the divider, put each mouse back in, and begin the test: Boring!! Scored a total of 3♂ approaches, 4 ♀ approaches, 2♀ retreats. The ♂ spent ~95% of the time huddled in one corner, seemingly asleep. The ♀ generally kept her distance after the first 4min, except for the last few minutes At 1030h Julie took a vaginal smear= Despite the lack of results, the long warmup period appeared good because both animals appeared "calm" and weren't preoccupied with getting out.