Mayhew 1960 Journal 36. May 9 Colorado Desert, Imperial Co., Calif. After eating chow at the east end of the pavement, we began night collecting toward Elamio at 2000. A Hypsiglena torquata was found slightly injured 11 mi. E. of Elamio, but no other animals were seen (except rabbits) until we were west of Elamio. We finally caught 18 Coleonyx variegatus, but released one obviously gravid ♀ when we decided we had a large enough sample of ♀. No other reptiles were seen alive, but 2 recently squashed Crotalus cerastes were found. We stopped for the night at 2315 on top of Dune Crest Drive. We drove the car - all 221 miles today. The maximum temp. today was 105°F., the minimum temp. tonight was 74°F. May 10 We arose at 0500 and ate breakfast. We looked for lizards along the road from 0635 to 1110. We drove first to Elamio, then back through the dunes and between the 2 canals. We only had time to make one pass through the area before it became so hot the animals retreated underground. Some Celligaurus draconoides were still active when we left the area, but they were so spooky we couldn't catch any. No Phrynosoma calli were seen this morning, even though we drove through the area we did so well in last evening. It was getting quite hot by the time we reached that area, however. We left the entire area at 1120.