[dd. Fourth toe shorter; upper parts either green 

 or with scattered tubercles; belly with faint 

 spots; broad light transverse band across back 

 just back of forelimbs. 

 Mexican cliff frog. Eleutherodactylus augusti. Plate LI.] 



cc. Size small 3/5-1 3/5 inches (15-39.5 mm.); with- 

 out ventral disk; voice a cricket-like chirp; head 

 narrower (2.66-3.38 in L.); head usually narrower 

 than head to tympanum; eye larger (5-8 in L.), 

 eye greater than 1st finger; fingers smaller. 

 d. Usually a light stripe from eye backward 

 along dorsolateral region; a light transverse 

 band between eyes; toes longer; forelimb 

 shorter (1.7-2 in L.); foot with tarsus longer. 

 Ricord's frog. Eleutherodactylus ricordii. Plate LIII. 



dd. Usually without light dorsolateral stripe from 

 eye backward; usually no transverse band be- 

 tween eyes; toes snorter; forelimb longer 

 (1.45-1.88 in L.). 



e. Tympanum smaller (11-13 in L.); hind 

 ' limb shorter (.72-87 in L.); internasal 

 broader (8-9 in L.); forelimb usually 

 greater than foot with tarsus. 

 Marnock's frog. Syrrhophus marnockii. Plate LVI. 



ee. Tympanum larger (8-10. in L.); hind 

 limb longer (.72-73 in L.); internasal 

 shorter (9-10 in L.); forelimb usually less 

 than (rarely equal to) foot with tarsus. 



Camp's frog. Syrrhophus campi. Plate LV. 



29 



