Amphibians and Reptiles of the Rainforests of Southern El Petén, Guatemala

A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, México

A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacán, México

Neotropical Hylid Frogs, Genus Smilisca

A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus

Systematic Status of the Colubrid Snake, Leptodeira discolor Günther

A Taxonomic Study of the Middle American Snake, Pituophis deppei

A Review of the Frogs of the Hyla bistincta Group

Descriptions of New Hylid Frogs From Mexico and Central America

Descriptions of Two Species of Frogs, Genus Ptychohyla

The Amphibians and Reptiles of Michoacán, México