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Norton, E. 1875a. Report upon the collections of Hymenoptera made in portions of Nevada, Utah, Colorado, New Mexico, and Arizona, during the years 1872, 1873, and 1874. Report upon the collections of Formicidae. Pp. 729-736 in: Yarrow, H. C. (ed.) 1875. Report upon geographical and geological explorations and surveys west of the 100th meridian, in charge of First Lieut. Geo. M. Wheeler. Volume V. Zoology. Washington, D. C.: U. S. Government Printing Office, 1021 pp.
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