Quast 1948 Journal 144 June 27 Arroyo San Louis, 300± ft, 9 mi W. Calmelli, Baja California Owl, Purple Martin, California Gnat, Ash-chested flycatcher, White-winged Dove, and Olive-green Swallow. Brush Rabbits and Jack Rabbits are very common, the Brush Rabbit being seen mainly among the denser vegetation of the wash and bordering areas, the Jack Rabbit among the dense Ocotillo, Phaya aquia and Cholla vegetatio of the area bordering the wash. Coyotes were heard yapping and howling in loud confusion this morning before sunrise a short distance from camp and Dr. Benson caught one in a single steel set he put out last night. Lewis caught one Gopher last night. I revisited the horizontal tunnel of the mine this morning and obtained two Chaunmyctris mexicanas; a female with a very large embryo and a jivenil about 3/4 grown. I was unsuccessful in looking at the soft sand portions of the wash in finding one square inch of sand that had not been disturbed by some mammal, bird or reptile. From the looks of some of the new cuts in the arroyo banks it must have had water flowing in it within the last two or three years. June 28 Santa Rosalia, Baja California Arrived here this morning after having the