J. Rodgers-1940 Cnemidophorus tesselatus June 7 - see no. 2656 Aug. 15. Mrs. Vert. Zoöl., Univ. Calif., Berkeley, Calif. No. 2167, a large male from Arroyo Mochos has been eating 10+ mealworms a day for the past few days (others have also been eating). At 11:50 am to-day 2167 was seen standing high on back lip, back and tail arched and defecating. The stool was 41 mm. long and slightly larger in diameter (6mm) in the middle than at the ends. The first end to be deposited, was white for 9 mm., the rest was black. He lay walked along about 55 mm. while depositing the stool. When the final end broke loose, the tail was bent around to nearly 90° to the side and the lizard crawled about 1/2 inches sliding it vent region on the sand. Then it turned, walked back and with its right front foot pushed sand over the fresh stool. It made three fast strokes forward pushing the sand. 11:20 2173 ♂ defecated but did not cover the stool 2172 ♀ is least active and does not eat much. She is thinner than the others. 2172♀ & 2173♂ are from Madera Co. 2167♂ and 21689 are from Arroyo Mochos. 2168♀ is very active Aug. 30 Mrs. Vert. Zoöl. No 21689 was coming out of the carabouss shelter. It kicked sand violently twice as if trying to pull its tail loose from something inside the shelter that was holding it. It pulled loose, and I noticed that the distal 2 inches of its tail