6. Taxonomic notes on some Mexican and Central American hylid frogs. By William E. Duellman. Pp. 263-279. June 17, 1966.
7. Neotropical hylid frogs, genus Smilisca. By William E.
Duellman and Linda Trueb. Pp. 281-375, pls. 1-12, 17 figures in text. July 14, 1966.
8. Birds from North Borneo. By Max C. Thompson. Pp. 377-433, 1 figure in text. October 27, 1966.
9. Natural history of cottonmouth moccasin, Agkistrodon piscivorus (Reptilia). By Ray D. Burkett. Pp. 435-491, 7 figures in text. October 27, 1966.
More numbers will appear in volume 17.