FOSSIL BIRDS. 429 



Genus CATHARTORNIS Miller. 



Cathartornis L. H. Miller, Univ. Calif. Publ., Bull. Dept. Geol., VI, 

 No. 1, Nov. 28, 1910, 14. Type, by monotypy, Calhartornin gracilis 

 L. H. Miller. 



Cathartornis gracilis Miller. 



Cathartornis gracilis L. H. Miller, Univ. Calif. Publ., Bull. Dept. Geol., 

 VI, No. 1, Nov. 28, 1910, 14, figs. 4a, 46. 



Pleistocene: Rancho La Brea, Los Angeles, Calif. 



Family TERATORNITHIDAE. Teratornithes. 

 Genits TERATORNIS Miller. 



Teratornis, L. H. Miller, Univ. Calif. Publ., Bull. Dept. Geol., V, No. 21, 

 Sept. 10, 1909, 307. Type, by monotypy, Teratornis merriami Miller. 



Teratornis merriami Miller.' 



Teratornis merriami L. H. Miller, Univ. Calif. Publ., Bull. Dept. Geol., 

 V, No. 21, Sept. 10, 1909, 307, te.\t figs. 1-9. 



Pleistocene: Seminole Field, and Bradenton, Florida; Rancho La Brea, Los 

 Angeles, McKittrick, and Carpinteria, California. 



Suborder FALCONES. Kites, Hawks, Buzzards, 

 Eagles, Harriers, and Falcons. 



SuPERFAMiLY FALCONOIDEA. Hawks and Allies. 



Family ACCIPITRIIDAE. Kites, Hawks, and Allies. 



Genus PALAEOBORUS Coues. 



Palaeoborus Coues, Key N. Amer. Birds, ed. 2, 1884, 822, Type, by orig. 

 desig., Cathartes umb7-osus Cope. 



Palaeoborus umbrosus (Cope).^ 



Cathartes umbrosus Cope, Proc. Acad. Nat. Sci. Phila., XXVI, 1874, sig. 

 10, Oct. 20, 151. 



Pliocene: North of Pojauque, New Mexico. 



' Pleistogyps rex L. H. Miller, Univ. Calif. Publ. Geol., VI, No. 1, Nov. 28, 

 1910, 16, figs. 5a, 5b is based on the tarso-metatarsus of Teratornis merriami, cf. 

 L. H. Miller, Carnegie Inst. Washington, Publ. 349, Aug., 1925, 65, 87, 92. 



2 The statement of F. A. Lucas, in Zittel's Text-book of Palaeontology, Engl. 

 Transl., 2, 1902, 277, that this form is allied to Polyborus seems questionable. 

 Further study is required before it can be assigned definitely to subfamily. 



