atchfield -1934 Colo. R., ½ mi. N Calif.-New Monument, 500 ft., Clark Co., Nev. 328 February 1, 1934 Caught in traps- 1 Signodus hispidus (yg.) 1 Peromyscus maniculates Put these two up and then blew skulls. After this, went out hunting birds. Shot quatcatcher, Audubon warbler, mountain bluebird, 2 sage thrashers, robins. Got back to camp about noon. Put up all but the robin in the afternoon. At 4:00 P.M. went over trap- live again. Had caught 2 adult Signodoros and one young. The young individual was caught in a small grass "island" (surround- ed by water); we caught 4 young in this same area, seeming to indicate the presence of a nest. Put up the robin and the young Sigmodor after dinner tonight. February 2, 1934 Caught in traps- 1 Sora rail 1 Signodus hispidus 1 Reithrodontomy After going over traps, Fitch and I started north on the island, primarily to look for new colonies of cotton rats, and incident- ally to hunt birds. We walked about