THE SYSTEMATICS OF CROTAPHYTUS WISLIZENI, THE LEOPARD LIZARDS. PART IIL THE LEOPARD LIZARDS OF THE GREAT BASIN AND ADJOINING AREAS, WITH A DESCRIPTION OF A NEW SUBSPECIES FROM THE LAHONTAN BASIN Wilmer W. Tanner' and Benjamin H. Banta^ Abstract.— A general analysis of the populations of Crotaphytus wislizeni in the Great Basin is presented. A new subspecies, C. wislizeni maculosus, for the Lahontan Basin, Nevada, is described and comparisons of color pattern, some scale patterns, and skull measurements are presented. In Part I of this .series we (Tanner and Banta 1963) reported the taxonomic status of Crotaphytus wislizeni wislizeni and de-scribed the subspecies C. iv. punctatus from the Upper Colorado River Basin. Part II (Banta and Tanner 1968) dealt with the leopard lizards of Baja California, Mexico, with the description of the subspecies C. w. neseotes from Cedros Island. The present study is concerned with the taxonomy of the populations occurring in the Great Ba-sin and adjoining areas west of the Colorado River. With a few exceptions, leopard liz-ards from this large area have been referred to as C. w. wislizeni. However, we note real differences between some populations in this area and those seen from areas to the east (Arizona and eastern Utah), the south (Baja California), and the west (Central Cal-ifornia). The Great Basin is a large geographical area lying between the Rocky Mountains and high plateaus of central Utah on the east and the Sierra Nevada Mountains to the west. Ingress into this area has occurred from the south and southeast with lizards from the southern deserts extending their ranges northward either along the desert ranges or the alluvial valleys. The leopard lizards have used the desert valleys to ex-tend their ranges as far north as southern Oregon and southwestern Idaho. Specimens from the Great Basin seen by us while preparing the two previous reports were reexamined, and the data are now being added to that pertinent to this report. We have received on loan from Dr. John Wright, Los Angeles County Museum (LACM), a large series of specimens from the southern parts of the Great Basin. These and those seen from other collections (see previous reports) form the basis for this study. Several collections have been made by the authors or their students, in areas not well represented by existing collections, for the purpose of procuring live material. We are grateful to the following for mate-rials sent on loan from critical areas: Mr. James Davis, Indio, California; Dr. Steven C. Anderson, Pyramid Lake, Nevada; Dr. Nathan M. Smith, southern Idaho and southern California; and Mr. M. L. Abts, south central Oregon. Specimens from the Nevada Test Site were obtained by the sen-ior author as a part of the Atomic Energy Commission Grant AT (11-1)-819. Other colleagues and students have aided in the field work and have provided data and sug-gestions for which we are most apprecia-tive. We are grateful to Drs. Robert C. Stebbins and David Wake for the privilege of examining the extensive collections at the University of California at Berkeley (MVZ), and to Dr. Alan E. Leviton for the opportu-Life Sciences Museum. Brigham Young Universit; 421 Santa Helena, Solana Beach. California 9207 Provo. I'tah 84602. 225
the systematics of Crotaphytus wislizeni, the leopard lizards, part III. The leopard lizards of the Great basin and adjoining areas, with a description of a new subspecies from the Lahontan basin
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