Introduction

Taxonomic History

Discontinuity of Range

Re-description of a Subspecies from New Mexico

Description of T. s. parietalis

Comparison of T. s. parietalis and T. s. fitchi

Intermediate and Atypical Populations

Acknowledgments

Literature Cited

Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains

BY

HENRY S. FITCH AND T. PAUL MASLIN