3). Amphibia of El Salvador The Genus Oedipus 16) ras------------------------platydactylus Dorsal area not of clear yellow----------17 17) Large species over 150 mm.----------18 Small species under 100 mm.--------------19 18) Legs longer,black with dirty yellowish or red- dish dorsal area,Costa Rica and Panama----- ---------------------------lignicolor Legs shorter,brown with ochre mottlings,Yuca- tan,Guatemala--------------------yucatanus 19) No maxillary teeth------------------20 Maxillary teeth present,east face of Andes, Colombia to Bolivia--------------altamazonicus 20) A dermal ridge across head,dark with lighter streaking,Panama-----------------colonneus No dermal ridge across head,a lighter dorsal area,Mexico and Guatemala------rufescens 21) Toes free or nearly so(nostrils large)----22 Toes much reduced,entirely webbed---------23 22) 2-3 costal folds between appressed toes,Hon-a duras---------------------------nasalis 6 costal folds between appressed toes,Costa Rica------------------------------picadoi 23) Nostrils large in adult,not worm-like----24 Nostrils not large in adult,worm-like----25 24) Teeth on maxilla,4-5 costal folds between ap- pressed toes,Mexico--------------townsendi No teeth on maxilla,6 costal folds between appressed toes,Mexico------------pennatulus 25) Costal grooves 14,snout blunt,Mexico------ ---------------------------lineolus Costal grooves 17 or more-------------26 26) Snout blunt,eyes large--------------27 Snout sharp,eyes small-----------------28