PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM issued iMr^iVj-^ O^s^i ^H '^* SMITHSONIAN INSTITUTION U. S. NATIONAL MUSEUM Vol. 84 Washington : 1936 No. 3003 TWO NEW SPECIES OF HAWKS FROM THE MIOCENE OF NEBRASKA By Alexander Wetmore Assistant Seci-etary, Smitfisoiiian Institution From collections made by Ted Galuslia, the United States National Museum recently has obtained two fragmentary metatarsi that repre-sent, respectively, new species in the families Accipitridae and Fal-conidae. Both are of more than usual interest, the first because it reveals an additional American species of the subfamily Aegypiinae, whose living representatives are found only in the Old World, and the second because it carries the group of falcons in America back into the Miocene. In connection with work on the falcon I have had the benefit of examination of the type of Falco falconelhis Shufeldt, of uncertain status, through the kindness of Dr. Richard S. Lull and Dr. Malcolm R. Thorpe, of the Peabody Museum, Yale University. The drawings herein were made for me by Sidney Prentice. Family ACCIPITRIDAE Genus PALAEOBORUS Coues PALAEOBORUS HOWARDAE, new species Characters. — Distal end of tarso-metatarsus (fig. 13) similar to that of Palaeohorus umhrosus (Cope)^ but slightly larger; outer intertrochlear sulcus broader; middle trochlea relatively larger; 1 Cathartes umhrosus Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 26, Oct. 10, 1874, p. 151. Metatarsus illustrated in Cope, Rep. U. S. Geogr. Surv. West 100th Merid., vol. 4, pt. 2, 1877, pi. 67, figs. 15, 15a, 15c. 73 92744—36
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