^/ ^(^70 Vol. 53, pp. 55-64 April 19. 1940 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON x^ APi^26l94i; DESCRIPTIONS OF NEW LIZARDS AND SNAKES FROM MEXICO AND GUATEMALA. BY HOBART M. SMITH.' Among the reptiles collected in Mexico during the past year in pursuance of my studies of the Mexican herpetological fauna under grant from the Walter Rathbone Bacon Traveling Scholarship fund of the Smithsonian Institution, several new species and subspecies have been discovered which it is desirable to describe and name at the present time. Ameiva undulata hartwegi, new subspecies. Holotype.—V. S. National Museum No. 108600 (H.M.S. field No. 8208) from Chiapas, Mexico, directly across the Usumacinta River from Piedras Negras, Guatemala. Diagnosis. — A subspecies of Ameiva undulata characterized by having small, irregular, median gular scales smaller than preanals or mesoptychials; preanals in two rows; lamellae under fourth toe 29 or more; femoral pores 18 or more. Remarks. — This subspecies is the same as variety A of Hartweg and Oliver (Occas. Papers Univ. Michigan Mus. ZooL, No. 359, 1939, p. 7), and also the same as undulata parva Smith (Occas. Papers Univ. Michigan Mus. ZooL, No. 388, 1938, pp. 4-5). The form is named for Doctor Norman Hartweg in recognition of his very important contributions to the understanding of the subspecies of Ameiva undulata. Ameiva undulata stuarti, new subspecies. Holotype.—U. S. National Museum No. 108G01 (H.M.S. field No. 8809) from Palenque, Chiapas, Mexico. Paratypes. — Thirty-nine specimens (H.M.S. field Nos. 8471-4, S4S3-5, 8502-4, 850&-11, 8550-2, 8673, 8684-6, 8750, 8754, 8762-3, 8790-1, 8798-9, 8814-8, 8880, 8899, 8927), all from Palenque. Diagnosis. — A subspecies of Ameiva undulata having a median row of 1 Published by permisBion of the Secretary of the Sniithsoniun Institution. 13— Pboc. Biol. Soc. Wash., Vol. 53, 1940. (56) APR 25 \m
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