IV BULLETIN 194, UNITED STATES NATIONAL MUSEUM 



Class Amphibia — Continued 



Key to Mexican suborders of Salientia 33 



Suborder Opisthocoela 34 



Family Rhinophrynidae 34 



Genus Rhinophrynus 34 



Suborder Anomocoela 34 



Family Pelobatidae 34 



Genus Scaphiopus 35 



Suborder Procoela 36 



Key to Mexican families of Procoela 36 



Family Bufonidae 37 



Genus Bnfo 37 



Family Leptodactylidae 46 



Key*to Mexican genera of Leptodactylidae 46 



Genus Ertgystomops 47 



Genus Tomodactylus 47 



Genus Syrrhophus 49 



Genus Microbatrachylus 53 



Genus Leptodadylus 55 



Genus Eleufherodadylus ^ 57 



Family Hylidae 67 



Key to Mexican genera of Hylidae 67 



Genus Cenlrolenella _. 68 



Genus Diaglena 69 



Genus Triprion 70 



Genufi Anolheca 70 



Genus Pternohyla 70 



Genus Agalychnis 71 



Genus Plectrohyla 73 



Genus Acrodytes 74 



Genus Smilisca 75 



Genus Hylella 76 



Genus Acris 77 



Genus Hyla 77 



Genus Ptychohyla 91 



Suborder Diplasiocoela 91 



Key to Mexican families of Diplasiocoela 91 



Family Microhylidae 91 



Subfamily Microhylinae 92 



Key to Mexican genera of Microhylinae 92 



Genus Microhyla 92 



Genus Hypopachus 94 



Family Ranidae 96 



Subfamily Raninae 96 



Genus Rana 96 



State lists — - 100 



Index - - 109 



