J. D. Anderson 1957 Ambystoma m. croceum Dec. 5 Valencia lagoon, Rio del Mar, Santa Cruz Co., Calif. 1 ad. ? marked + released 106 yds W. I. G. house. Cl. temp. 14.0°C. Time 5:45 pm. Slightly cloudy sky at dusk. Had rained in morning - more since 10 am. Road wet. #3 About 1/2 hour later sky cleared, stars + moon showing. 3 hrs. of road check drew complete blank. Dec. 15 Valencia lagoon, Rio del Mar, Santa Cruz Co., Calif. 14 ad. marked + 5 taken for study. 9 ♂♂ + 6♀♀. All in fine breeding condition. No rain since early morning but one slight (10 min) + light shower at 9 pm + one heavy (10 min) shower at 10 pm. Walked road 4 + 1/4 km. 6 round trips to spring, 2 to Cedar home + 1 on hill road. Sky overcast, cloudy, very dark night. Not much better than Dec. 5. Difference must lie in sky condition. Dec. 19 1.5 mi. S. E. La Selva Beach, Santa Cruz Co., Calif. 2 ad. ♂ taken in funnel trap in 4" of water. Trap set out at 4:30 pm, found A. m. croceum at 9:05 pm. Cl. temp 9.0 for both, water temp. 4" 9.0°C. Temp air 1/4" above with 6.0°C. Both ♂♂ in excellent breeding condition + we brought back for study. Interesting that they are in water already & I haven't been able to find them under logs etc.