NOTA ACERCA DE LA DISTRIBUCION GEOGRAFICA DE LOS REPTILES PONZOá‘OSOS EN MEXICO

Resumen

In this work are summarized all of the available data concerning the geografic distribution of the poisonous reptiles in Mexico. Fortysix forms of them are included, and they are represented in the following manner: genus Micrurus ("coral snakes"), with 14 forms distributed in all parts of the Country; Pelamydrus platurus ("marine snake"), found in almost all the Mexican Pacific, from the Gulf of California southward; genus Agkistrodon, with one species that inhabits a great part of our Pacific coast and two others that probably live in the north; Sistrurus, with one form found in the northern region and another taht is found in the eastern slopes and in part of the Central Plateau; 16 forms of Crotalus ("rattlesnakes") distributed in Mexican
Soil, occupying all of it, sorne being characteristic of hot dry lands, others of humid tropical localities, etc.; eight species of Bothrops ("nauyacas," etc.), exist in the humid tropical region that comprises the east and southeast; at the end, two species of poisonous lizards of the genus Heloderma ("escorpión" and "Gila monster") that are found especially in all of the pacific slope.