0^73 *? Vol. 47, pp. 121-134 June 13, 1934 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON ON THE TAXONOMIC STATUS OF THREE SPECIES OF LIZARDS OF THE GENUS SCELOPORUS FROM MEXICO AND SOUTHERN UNITED STATES. BY HOBART M. SMITH, University of Kansas, Lawrence, Kansas. The study of the lizards of the genus Sceloporus in the col-lection which Dr. Edward H. Taylor and myself 1 secured in Mexico during the summer of 1932 has revealed the presence of a number of extremely interesting forms, three of which are discussed in this paper. Sceloporus jalapce Giinther, which has in the past been synonymized with graciosus, is found to be valid. Sceloporus marmoratus Hallo well is shown to be a distinct northern subspecies of Sceloporus variabilis Wiegmann. A striking sexual dimorphism, not hitherto noted, has been discovered in S. couchii Baird, and the external morphology of this species has given a very interesting clue to the relationship of Sceloporus to Uta. These points are discussed in detail in the following. Sceloporus jalapoe Giinther. Text Fig. 1. Sceloporus gratiosus Boulenger 1885, pp. 230-231 (part). Giinther 1890, p. 71 (part). Boulenger 1897, pp. 507-508 (part). Sceloporus graciosus Cope 1885, p. 379 (non Baird and Girard). Cope 1900, pp. 386-389 (part). Sceloporus jalapce Giinther 1890, p. 74. Nine specimens of this rare species were collected, in the following localities: two (nos. 3160, 3161) about 10 miles south of Canada de Morelos, i Unless otherwise indicated, the catalogue numbers refer to specimens in this collection. Those numbers preceded by KU refer to specimens in the collection of the Dyche Natural History Museum of the University of Kansas. 25— Psoc. Biol. Soc. Wash., Vol. 47, 1934. (121)
BioStor
