THE UNIVERSITY OF KANSAS SCIENCE BULLETIN Vol. XXIV.] July 15, 1936 [No. 18. Description of a new Mexican Subspecies of Sceloporus spinosus Wiegmann (Lacertilia) HOBART M. SMITH Department of Zoology, University of Kansas Abstract: Sceloporus spinoaus caeruleopunctattis ssp. nov., is described from Cerro de San Luis, Oaxaca, Mexico. Types at University of Kansas. AMONG the specimens collected in Mexico during the summer of 1935 by Dr. Edward H. Taylor and myself are four which represent an undescribed, distinct subspecies of Sceloporus spinosus Wiegmann, which may be described as follows:* Sceloporus spinosus caeruleopunctatus ssp. n. Holotype. EHT & HMS 8467, collected on the slopes of Cerro de San Luis, about 15 miles N. of Oaxaca, Oaxaca, August 5, 1935, by Hobart M. Smith. Paratypes: EHT and HMS 8464-6, from the type locality, same collector. Diagnosis. Closely related to spinosus spinosus, differing in average scale characters and dorsal coloration. Dorsal scales from occiput to base of tail, 31 to 34 (30 or less in s. spinosus) ; ventrals, 47 to 52 (average, 45.6 in s. spinosus) ; femoral pores 9 to 13; lorila-bials usually reduced to one row below subocular (rarely in s. spi-nosus) ; supraoculars, five to seven (rarely six, usually four in s. spi-nosus) ; prefrontals usually in contact medially (seldom in s. spi-nosus) ; some of the dorsal scales dark blue, coloration otherwise much as in s. spinosus. Description oj holotype. Head scales smooth, slightly convex, pitted; interparietal pentagonal; parietals single on either side, about two thirds size of interparietal; frontoparietals single on either side, more or less square, separated from each other medially by contact of frontal and interparietal; posterior section of frontal * I am greatly indebted to Dr. Edward H. Taylor for making possible the study of these specimens, and for other courtesies and assistance. The study of the genus Sceloporus has been forwarded by grants from the Graduate Research Fund of the University of Kansas. (469)
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