460 PROCEEDINGS OF THE ACADEMY OF [1897. REPTILES FROM SONORA, SINALOA AND JALISCO, MEXICO, WITH A DESCRIPTION OF A NEW SPECIES OF SCELOPORUS. BY JOHN VAN DENBURGH. This paper is an enumeration of the species of reptiles contained in three small collections, and is presented in the hope that it may be of use to those who are interested in the distribution of Mexican lizards and snakes. Two of these collections are in the California Academy of Sciences: the first, gathered in Sonora by Dr. Gustav Eisen and Mr. Walter E. Bryant in April and May, 1S92; the second, due to the efforts of Dr. Eisen and Mr. Frank H. Vaslit in Sinaloa and Jalisco in October and November, 1894. The third collection was secured by Dr. David Starr Jordan and a j)arty of students at Mazatlan in December, 1894, and January, 1895, and is in the Zoological Museum of Leland Stanford Junior University. 1. Phyllodactylus tuberculosus Wiegm. A fine specimen of this gecko (Cal. Acad. Sci., No. 3,389) was obtained at Matzalan, Sinaloa, in October. The California Academy possesses two specimens (248, 249) secured in Durango by Mr. C. A. Hamilton. 2. Gehyra mutilata (Wiegm.). Eighteen specimens of this lizard (C. A. S.. 3,350-3,367) were collected at San Bias and one (C. A. S., 3,180) at Tepic, Jalisco. Females taken in October contain eggs which must have been nearly ready for laying; femoral pores vary from eleven to twenty on each side. In connection with Dr. Giinther's suggestion that this species has been recently introduced into America, 1 it may be of interest to note that geckos sometimes come to San Francisco in the holds of vessels. 3. Coleonyx variegatus Baird. Several specimens were caught at San Miguel de Horcasitas, in Sonora, in April, 1892. 4. Anolis nebulosus (Wiegm.). Dr. Eisen and Mr. Vaslit secured this species (3,181-3,188) at Tepic, Jalisco, in October. The California Academy possesses also l Biol. Centr. Amer. Rept., 1893, p. 81.