Produced by Chris Curnow, Tom Cosmas, Joseph Cooper and the Online Distributed Proofreading Team at http://www.pgdp.net Transcriber's Note Typographical corrections are listed at the end of this version. The list of publications has been compiled after the article's text. * * * * * UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Volume 15, No. 6, pp. 251-295, 9 figs. October 4, 1963 A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America) BY JOHN WELLMAN UNIVERSITY OF KANSAS LAWRENCE 1963 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, Henry S. Fitch, Theodore H. Eaton, Jr. Volume 15, No. 6, pp. 251-295, 9 figs. Published October 4, 1963 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY JEAN M. NEIBARGER. STATE PRINTER TOPEKA. KANSAS 1963 [Illustration: Union Label] 29-5936 A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America) BY JOHN WELLMAN CONTENTS PAGE INTRODUCTION 253 ACKNOWLEDGMENTS 254 MATERIALS AND METHODS 254 GENUS Conophis Peters 255 Key to the Species and Subspecies 257 Analysis of Characters 257 Scutellation 258 Size and Proportions 258 Color Pattern 260 Sexual Dimorphism 260 _C. lineatus_ 262 _C. lineatus dunni_ 262 _C. lineatus lineatus_ 267 _C. lineatus concolor_ 270 _C. nevermanni_ 272 _C. pulcher_ 274 _C. vittatus_ 277 Skull 282 Dentition 288 Vertebrae 288 Hemipenes 289 Food and Feeding 289 Effect of Poison 290 TAXONOMIC RELATIONSHIPS AND EVOLUTION 291 SUMMARY 292