Mayhew 1959 Journal 57, May 23 Algodones Dunes, Imperial Co., Calif. ate, however, we decided we would investigate the creosote bush scrub area between the all-American Canal + the western edge of the dunes. (We had a large enough sample of Uma notata by then.) Upon counting, we found we had captured the following during the morning: Uma notata - 20 (3 ad m., 3 ad(?) m., 5 ad f., 5 in. m., 4 in. m.) Urosaurus graciosa - 6 (2 ad. m., 4 ad. f.) We began to look for lizards near the Canal at 1245, and stopped looking at 1500. During this time we had captured the following: Diposaurus dorsalis - 3 (2 m., 1 f. ad.) Callisaurus draconoides - 1 (ad. m.) Cnemidophorus tigris - 1 Crotaphytus collaris - 2 (2 m. ad.) We left the area at 1530 (after dissecting the Callisaurus draconoides) and drove to Dillon Road north of Iridio. We waited there until sundown, then began collecting (at 1900) along the power line road where it intersects Dillon Road. We caught one Phrynosoma m'calli and 2 Ctenyx variegatus (1m., 1f.) along this road, even though the wind was blowing 4-7 mph. at that time. It shortly increased velocity to 16-20 mph., however, and we saw no animals for some time. Nevertheless we finally caught a young Diposaurus