98. El Cayon Canyon, 3200 ft. E. base San Pedro Martir Mts Lower California, Mexico. June 1. Gilmore 1946. quite common at the mouth. The burrows and runways of Citellus terricandus, t. were very common and often so numerous and close together as to resemble large colonies. The water in the stream had receded about a quarter of a mile up the canyon during the time that had elapsed since we had just come down to the mouth about two weeks previous. It seems probable that before long it will be back about a half a mile or farther. During the time of the night that the moon was up, or from midnight on, the gorwills were quite active and vociferous nearby. They kept up their plaintive whistle until almost daylight.