ESimpson, 1938 33. 800+ ft., Cerro Colorado, 28 mi. w. Sonora, Sonora. March 26, 1938 Quail and larger than the average northern Calif- oruia Valley Quail (other California quail I have seen to be larger than here, however). The scarcity and poorness of cover and the somewhat tame character of the quail here would not make for much sport - too easy. The quail are a very welcome tid-bit to the table as previous experienced on the way to Papago tanks; Dr. Benson and I scoring many and bagging a brace alongside the road. We followed a trail-road to Crater Elegante with some difficult in the cinders and sand; 3 or 4 times getting stuck, finally so badly that it was necessary to unload the truck to clear it. We made camp in a lava field: 900+ ft., 1/2 mi. s. Crater Elegante, 34 mi. w. Sonora, Sonora. Here set out 50 mousetraps along the banks of a wash and one of its tributaries at dark. March 27, 1938 In the 50 mousetraps caught: 2 Perognathus penicillatus (no amb.) (♂78, ♂79); 6 Peromyscus eremicus (no amb.) (♀ + 2 ♀; put up 4: ♀80, ♂81, (♀ emb.), ♂82, ♂83), 1 Dipodomys merriami (♂84), 1 Dipodomys deserti (♀85), 1 Neotoma albigula (♀86). The kangaroo rats and the pocket- mice were caught along the banks of the larger wash where the vegetation was heavier and more sandy; the others in the tributary wash where it was very rocky in its cutting thru a heavy lava field. The cheek-pouch