Calif. Ground Squirrel Mayhew 1947 Mar. 29 Strawberry Canyon, U.C. campus, Alameda Co., Calif. at 9:15 A.M. a ground squirrel hole was found in the side of a hill in a grassland habitat above the stadium. The hole was about 8" by 6", and the grass around it was rather short. June 7 at 9:04 A.M. we came upon several burrows of ground squirrels, around the mouths of which were scattered the remains of thistle heads. Apparently, they had cut the heads from the plants, then torn apart for the seeds they contain. The burrows were all on a south-facing slope, which dropped away at quite an angle. The ground was rather bare except for the occasional patches of thistles and a low cover of grasses. Some of the holes didn't have as much dirt around the opening as is usually encountered at a ground squirrel hole, nor was the opening as large as usual. One hole was only about 4 inches in diameter. The rest, however, were about 7 inches in diameter.