El Cayon Canyon, 3200 ft., E. base San Pedro Nits Lower California, Mexico. May 15, Gilmore 1966. 78. \$ 219. L. c. vallicola \S 160.0 G. Shot from top of dead willow near stream. \checkmark 220. Lizard Killed on sandy gravel flat. \$ 221 C. c. clarinensis \S Shot while flying over the camp with another pair. The catch on the trap line last night was not very good, perhaps due to the fact that the nights are dark. The flats and open spaces are limited here due to the extreme roughness of the mountains. The canyons are very steep and narrow hus cutting off space in the bottom until the creek bed alone is left. When two canyons converge there is sometimes a small flat like the one back of camp. The bottom flat is composed of a coarse sand, probably arkose interspersed with numerous boulders of granite. The vegetation consists mainly of ocotillos, palo verde, mesquite & willow. The creek bottoms contain willows where they alone are found. The steep sides of the canyons are covered with loose boulders and ocotillos & cardones (giant cactus). The birds are quite numerous along the willow & mesquite thickets but thin out towards the tops of the canyon.