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[[preprinted]] UNITED STATES DEPARTMENT OF AGRICULTURE BUREAU OF BIOLOGICAL SURVEY WASHINGTON, D. C. ADDRESS REPLY TO CHIEF, BUREAU OF BIOLOGICAL SURVEY, AND REFER TO [[/preprinted]] May 14, 1918. Mr. Alex. Wetmore, Assistant Biologist, Bureau of Biological Survey. Dear Mr. Wetmore: In accordance with letter of authorization N. 437-Bi. you will proceed on or about May 15, 1918, to San Antonio, Texas, for the purpose of investigating roosts that have been erected for bats near that city. You should get in touch with Dr. C. A. R. Campbell of San Antonio, who has been active in erecting these roosts, and secure as much information from him as possible. In addition you should visit the roosts, examine them, photograph them if possible, collect samples of guano, and if opportunity offers, secure specimens of the bat inhabiting them, and gather any other information that may seem pertinent. This work should require not more than one or two days. On completing this investigation you will continue, under letter of authorization No. 438-Bi., to Lake Burford (Stinking Lake) in the Jicarilla Indian reservation, New Mexico, and there make a detailed study of the waterfowl and other birds breeding at that lake. You should ascertain the species found there, and the approximate numbers of breeding birds of each kind. In addition you should make note of any information that will indicate the cover available for these birds as nesting sites, their food supplies, natural enemies, and other conditions affecting them. In carrying on this work you will have many opportunities for making