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The largest single collection of pygmy mice is in the University of Kansas Museum of Natural History, and, unless otherwise indicated, specimens cited in the taxonomic accounts beyond are there.I am indebted to the following named institutions and persons for making specimens available for study:

Abstrsot: Remains of prey in 41 golden eagle (Aquila chrysaetos) nests were studied in sheep-and goat-raising areas of westerIl Texas and New Mexico in 1968. Bones of black-tailed jack rabbits ( Lepus calitornicus), cottontails (Sylvikzgus audubonii and S. jloridanus), rock squirrels (Spermophilus variegatus), and prairie dogs (Cynomys ludovicianus and C. gunnisoni) comprised nearly 90 percent of all individuals found in nests. A greater portion of individual rock squirrels and prairie dogs were eaten than of rabbits. Seventy percent of all nests contained remains of at least 66 sheep and goats, most of which were young. Of the nests contairxing livestock, 15 each had one sheep or goat, only 2 each had five or more. It could not be ascertained from the bony remains in rlests whether prey species were brought to the nest as carrion or as fresh-kills. Sampling bias and other food habit considerations are discussed.This report was supported jointly by the Bureau of Sport Fisheries and Wildlife, the National Wool Growers Association and the National Audubon Society. We are indebted to these agencies for financial and logistical aid. The statements and conclusions reached in this paper, however do not necessadly carry the endorsement of these agencies or of their members. We are particularly grateful to the ranchers and foremen who graciously pennitted access to land in their care, and to others who provided information on nest locations. Among these were J. Hepler, R. Hubbell, M. Hughes, S. Hughes, W. Hughes, L Kirlcaid) V. McElhaney, C. Miller, B. Pfingston, T. Treat, J. White, and P. White. We also thank J. Beecham, E. Bolen, Lucy Hill Porter, and J. Rollo for their field and laboratory assistance. PROCEDURESIn ffie summer of 1968> prey remains were found in 41 of 53 eagle nests. Some nests were used the preceding spring, whereas others had no history of use in 12 years. An attempt was made to remove all food remains from each nest. Food materials found Received for publication December 2, 1970.

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