Gilmore 1926 El Cayon Canyon, 3200 ft. E. base San Pedro Martin Nths Lower California, Mexico May, 17. 39 traps caught nothing. 227. Lizard. Killed on rock in canyon bottom. 228. Lizard " " " " " " 229. Peromyscus ♂ 20.1 G. 186-99-21-17. Caught among rocks on side of hill. 230. Peromyscus ♀ 16.6G. 178-97-20-19. Caught under mesquite near creek. 231. L.C. vallicola ♂ 150.0 G. Shot in canyon bottom toward hills head of canyon. 232. L.C. vallicola ♀ 178.1 G. Same as above. One fully developed egg. Others in embryo. 233. Lizard. Shot on mesquite tree near creek. 234. Lizard. " " " " 235. V. pusilla ♂ 7.9 G. Killed from mesquite in canyon with water. 236. C.m. frontalis ♂ 18.9G. Killed from Palo Verde on flat between two canyon. 237. Lizard shot from large granite boulder near stream.. Trapping last night was very poor for some unknown reason. While hunting in the morning I saw the same common birds, M.c. emerazens, Calypte costae and V. pusella the most common. Quite a few L.C. vallicola and M. lucoplera were heards seen. One C.m. frontalis & 1 Polioptila a. hiscura were seen.