_Remarks_.--Five metamorphosing tadpoles and juveniles (KU 58074, 58234-8) were found at night on vegetation by streams. Of two completely metamorphosed young each has a snout-vent length of 15.7 mm. Another having a snout-vent length of 16.2 mm. has a tail stub 2 mm. long and a completely metamorphosed mouth. Two others have snout-vent lengths of 13.6 and 14.1 mm. and tail lengths of 11.5 and 8.1 mm. respectively; in these the mouth parts are incompletely metamorphosed. The single female available (UMMZ 121399) contains approximately 60 ovarian eggs, the largest of which are about 2.5 mm. in diameter. _Referred Specimens.--Chiapas_: 6.2 km. S of Rayón Mescalapa, KU 58063-74, 58199 (1 tadpole), 58234-8; 5.6 km. S of Rayón Mescalapa, KU 58062, 58200 (5 tadpoles); 11.4 mi. N of Pueblo Nuevo Solistahuacán, UMMZ 121395-9. The specimens listed last were collected along a stream between Pueblo Nuevo Solistahuacán and Rayón Mescalapa, which, according to Floyd L. Downs, is probably the same stream listed above as 5.6 km. S of Rayón Mescalapa. Acknowledgments I take this opportunity to thank Dale L. Hoyt, Thomas E. Moore, and John Wellman, who ably assisted in collecting and studying these frogs in the field. I am indebted to Floyd L. Downs for permission to include specimens collected by him and John Winklemann. My studies on hylid frogs are supported by the National Science Foundation (Grant G 9827). LITERATURE CITED DUELLMAN, W. E. 1960. Synonymy, variation, and distribution of _Ptychohyla leonhard-schultzei_ Ahl. Studies of American Hylid Frogs. IV. Herpetologica, 16:191-197, September 23. STUART, L. C. 1954. Descriptions of some new amphibians and reptiles from Guatemala. Proc. Biol. Soc. Washington, 67:159-178, August 5. TAYLOR, E. H. 1944. A new genus and species of Mexican hylid frogs. Univ. Kansas Sci. Bull., 30 (pt. 1):41-45, June 12. _Transmitted January 23, 1961._ 28-6442 * * * * * Transcriber's Notes Italicized text is shown within _underscores_. Italicized bold text is shown within ~_tildes and underscores_~. Page 352: Rejoined last paragraph, originally split by Plate 25. Page 355: Changed typo "Comaprisons" to "Comparisons."