196 



DR. H. GADOW ON MEXICAN 



[June 6, 



Contia nasus. 

 Zamenis mentovarius. 



„ mexicanus. 



„ pidcJierrimus. 



„ lineatus. 

 Coluber corais. 



Coronella micropholis, var. B. 

 Urotheca elapoides. 

 Drymobius margaritiferus. 



„ boddaerti. 



LeptopMs niexicana. 



„ diplolropis. 

 Wiadinea decor ata. 



„ clavata. 



„ vittata. 



StreptopJiorus atrattis. 

 Geophis semidoliatus. 

 Geagras redimitus. 

 TrimorpJiodon tipsilon. 



„ hiscutatus. 



Jlimantodes oencJioa. 

 Leptodira personata. 

 „ albofasca. 

 „ guilleni. 

 Conophis vittata. 

 Homa locranium ininiatum . 

 Manolepis putnami. 

 Fetalognathus nebidatus. 

 Dryophis acuminatus. 

 Elapsfulvius. 

 Lachesis lanceolatus. 



„ atrox. 

 Crotalus terrificus. 



„ triseriatus. 



Contreras. 



San Mateo, Tequesixtlan. 



Kio Balsas, Cocoyul. 



Salina Cruz. 



Iguala. 



LaRaya; Tequesixtlan; Ayutla. 



Chilpancingo, San Luis Allende. 



La Raya. 



Motzorongo, Agua fria, San Juan Evangelista. 



Motzorongo, La Raya. 



Motzorongo, La Raya. 



San Mateo del Mar. 



Presidio. 



Tetela. 



La Raya, Salina Cruz, Tequesixtlan, Totolapan : 



Oniilteme, Chilpancingo. 

 Presidio, Motzorongo, La Raya. 

 Orizaba. 



San Mateo del Mar. 

 Cuernavaca, Rio Balsas. 

 Tierra Colorada. 

 La Raya. 



Rio Balsas, Ayutla. 

 Cocoyul, San Luis ; Nevado de Colina. 

 Rio Balsas. 



Salina Cruz, Tequesixtlan. 

 Tezonapan, N. of Ajaitla. 

 Los Cajones. 

 La Raj'a. 

 Motzorongo. 



La Raya, San Juan Evangelista. 

 Motzorongo, La Raya. 

 Motzorongo. 

 Tequesixtlan. 

 Citlaltepetl, 9000-12,500' ; Nevado de Colima. 



Pbysical Features. 



A list of the names of the localities where collections have 

 been made should be supplemented by a short description of 

 the chief physical features ; without these it is of no more use 

 than the bare mentioning of the name of the political country. 

 The "altitude" is supposed to be all-sufficient; but this is a 

 great mistake, since it conveys nothing without further informa- 

 tion. For instance, 2000 feet on the Atlantic slope means typical 

 tropical hot-country vegetation, while on the Pacific side (e. g. 

 Oaxaca and Guerrero) the same elevation imj)lies pine- and oak- 

 forests, with a character devoid of tropical fauna and flora. 

 Mexicans divide their country into the Tierra Caliente, Templada, 

 and Fria, with a hot, temperate, and cool climate respectively ; the 

 Tiei'ra Templada corresponding on an average with an elevation 

 of 3000 to 5000 feet. But the natives of the State of Vera Cruz 

 draw the imaginary line at a level very difl[erent from that vised 

 by the citizens of Puebla. Chilpancingo, 4100 feet, in Guerrero, 

 has a much cooler climate, with nothing tropical about its 

 vegetation, than Oaxaca, 5060 feet, or even Orizaba at 4027 feet, 

 which is in many respects subtropical. 



Valley of Mexico, 7600 feet. Alluvial ; swamjDy meadows to 

 west and south. Lake Texcoco brackish. Lakes Chalco and 



