Kennerly Proc. Acad. Nat. Scien. Kennerly, Proceedings of the Academy of Natural Sciences of Philadelphia. 
Keys. & Blas. Wirbelt. Europ. Keyserling und Plasius. Wirbelthiere Europas. 
Kittlitz Kupf. Nat. Yog. Kittl'itz Kupfertaf&ln zur Naturgeschichte der Yogel. 
Lath. Ind. Ornith. Latham , Index Ornithologicus. 
Lawr. Ann. Lyc. Nat. Hist. Lawrence , Annals New York Lyceum of Natural History. 
Lawr. B. of N. Am. Lawrence in Birds of North America. 
Lawr. Prog. Acad. Nat. Scien. Lawrence in Proceedings of the Academy of Natural Sciences of Philadelphia. 
Leach, Oatal. Brit. Birds. Leach, Catalogue of British Birds. 
Leach, Steph. Gen. Zool. Leach in Stephens’ General Zoology. 
Less. Traite d’Ornitii. Lesson, Traite d’ Ornithologie. 
Linn. Syst. Nat. Linnaeus, Systema Naturce. 
Mmlh, Mon. Picidae. Malherbe, Monographic des Picidce. 
Malh. Rey. et Mag. Zool. Malherbe Revue et Magasin de Zoologie. 
Naum. Isis. Naumann in the Isis. 
Newton Zool. Newton in the Zoologist. 
Newton Ibis. Newton in the Ibis. 
Pallas Zoog. Rosso-Asiat. Pallas, Zoographica Rosso- Asiafica. 
Pallas Sitcil, Zool. Pallas, Spicilegia Zoologica. 
Ray Syn. Meth. Ay. Ray, Synopsis Methodica Avium et piscium opus posthumium. 
Richenb. Jour fur Ornith. Reichenbach, Journal fur Ornithologie 
Say Long Exped. Sag in Long’s Expedition to the Rocky Mountains. 
Schleg. Mon. Procell. Mus. Pays Bas. Schlegel, Monographic des Procellaridce Musee de Pays Las. 
Sclat. Proc. Zool. Soc. Sclater, Proceedings of the Zoological Society of London. 
Sc'lat & Saly. Ex. Ornith. Sclater and Salvin in Exotic Ornithology. • 
Spin Ay. Brasil. Spix, Avium Species ■ novae quas in itinere per Rrasiliam. 
Steller, Mss. Pall. Steller, Manuscript of Pallas. 
Steph. Shaw. Gen. Zool. Stephens in Slum’s General Zoology. 
Stkickl. Proc. Zool. Soc. Strickland, Proceedings of the Zoological Society of London. 
Sw. h Rich, Faun. Bor. Am. Swainson and Richardson, Fauna Boreali Americana. 
Temm. Faun. Jap. Temminck and Schlegel, Fauna Japonica. 
Temm. Plan. Color. Temminck Planches Goloriees des Oiseaux. 
Temm. Man. d’Orinth. Temminck Manuel d’ Orhithologie. 
Town. Jour. Acad. Nat. Scien. Townsend, Journal of the Academy of Natural Sciences of Philadelphia. 
Yieill. Ois. Am. Yieillot, Histoire Naturelle des Oiseaux de V Amerique Septentrionale. 
Yieill. Analy. Yieillot, Analyse d’une Nouvelle Ornithologie elementaire. 
Wils. Am. Orx. Wilson, American Ornithology. 
Xant. Proo. Acad. Nat. Scien. Xantus in the Proceedings of the Academy of Natural Sciences of Philadelphia . 
