V. Kennel's 1942 Peromyscus April 7, Muddy Creek, 100 to 1400 ft. 1 mi S Chualar Canyon, Monterey Co., Calif. 1100 and 1400 ft. also 2♂, 1♀ P. maniculatus and 2♂ 1♀ P.? The ♀ P. c had 2,8 mm. embryos. The ♀ P. m. had no embryos. The ♀ P.? had 2,9 mm. embryos. The slope was less steep here and with dense growth cover of Lotus sp. and ferns. April 8, Muddy Creek, 1000 ft., 1 mi S Chualar Canyon, Monterey Co., Calif. 2♂ and 1♀ P. maniculatus and 1 ♀, 1♂ P.? were captured in one of 127 traps set along dirt road in flat 1 mi. S. of entrance of Muddy Creek into Chualar Canyon. Here Salvia mellifera and Artemesia are dominant with some Baccharis and Rosa. Short grass grows beneath these bushes. April 9, 2 ♀ and 1 ♂ P. maniculatus caught in same locality as above. ♀'s appeared a little immature in peltage. April 10, Johnson Ranch, 800 ft., Chualar Canyon, Monterey Co., Calif. 1♀ P. truei with no embryos and 7♂and 8♀ P. maniculatus were caught in a margin between a young wheat field and the Artemesia covered hillside rising to form a canyon wall. Short grass was beneath the Artemesia.