216 BULLETIN 187, UNITED STATES NATIONAL MUSEUM 



Coniophanes schmidti 



Conophis lineatus coiicolor 



Dipsas brevifacies 



Dipsas sannioliis 



Dryadophis melanolomus melanolomus 



Drymarchon corais melanurus 



Drymobius margaritifex'us margaritif- 



erus 

 Elaphe flavirufa flavirnfa 

 Elaphe triaspis 

 Ficimia publia 



Imautodes splendidus spleDdidus 

 Imantodes tenuissimus 

 Lampropeltis triangulum blanchardi 

 Leptodeira annulata polysticta 

 Leptodeira yucatauensis yucatanensis 

 Leptodeira yucatanensis malleisi 

 Leptophis mexicanus yucatanensis 

 Leptophis occidentalis praestans 

 Masticophis mentovarius mentovarius 

 Ninia sebae moileyi 



Opheodrys mayae 



Oxybelis acuminatus 



Oxybelis fulgidus 



Pliocercus andrewsi 



Pliocercus elapoides schmidti 



Pseustes poecilonotus poecilonotus 



Sibon nebulatus 



Spilotes pullatus mexicanus 



Stenori'hina freminvillii apiata 



Tantilla canula 



Tantilla cuniculator 



Tantilla moesta 



Ti'opidodipsas fasciata 



Tropidodipsas sartoi'ii sartorii 



Thamnophis sauritus chalceus 



Thamnophis sumicbrasti praeocularis 



Micrurus afSnis mayensis 



Agliistrodon bilineatus 



Bothrops atrox asper 



Bothrops yucatanicus 



Crotalus durissus durissus 



ZACATECA9 



Couopsis nasus 

 Elapbe chlorosoma 

 Heterodon nasicus kennerlyi 

 Hypsiglena afBnis 

 Lampropeltis triangulum nelsoni 

 Masticophis bilineatus 

 Masticophis taeniatus ornatus 

 Salvadora bairdii 



Sonora michoacanensis mutabilis 

 Trimorphodon upsilon 

 Thamnophis eques eques 

 Crotalus lepidus klauberi 

 Crotalus molossus nigrescens 

 Crotalus polystictus 

 Crotalus scutulatus scutulatus 

 Crotalus willardl 



