Lee Arnold 1937 Peromyscus maniculatus June 7, Near Smith Creek Cave, Mt. Moriah, White Pine Co., Nev. On the same night I caught 3 ad. ♀ out of twelve traps on the bottom land. This gives a fair idea of the relative abundance of this animal in the two habitats. June 8, 3 mi. E Smith Creek Cave, 5,600 ft., Mt. Moriah, White Pine Co., Nevada. Out of 42 mouse traps and 25 catch-clive traps set on the flat plain to the east of camp I only caught one adult ♀ Peromyscus. This was on comparatively even ground with a "pavement" of small stones. The bushes, consisting of sage and salt bush (?) were scarcely over a foot high. June 9, near Smith Creek Cave, 5,800 ft., Mt. Moriah, White Pine Co., Nevada. 1 ad. ♂; 1 ad. ♀; and one Imm♂ caught out of 42 traps on hillside sparsely brushed and for the most part at about a 45° angle. It was interesting to note that two Erinatus were caught in apparently the same type of place. June 10, 3 ♂ and one ♀ caught 2 mi. E Smith Creek Cave, White Pine Co., Nevada. Most of these were under bushes on the