Belly grayish green with brown mottling; a large tubercle at each end of first lower tooth-row _P. ignicolor_ 4. Tooth-rows 4/6; cream-colored crescent-shaped mark on posterior part of body bordered posteriorly by large brown mark 5 Tooth-rows usually 4/7 (sometimes 4/6); cream-colored crescent-shaped mark on posterior part of body usually indistinct, not bordered posteriorly by large brown mark _P. spinipollex_ 5. Caudal musculature uniformly flecked with brown; lower tooth-rows 1-4 about equal in length to upper rows _P. euthysanota euthysanota_ Caudal musculature having brown square blotches dorsally on anterior one-half of tail; lower tooth-rows 1-4 usually slightly shorter than upper rows 6 6. Dorsal caudal blotches well defined and extending onto sides of tail; moderately large brown flecks on caudal fin; eye in life pale reddish brown _P. leonhardschultzei_ Dorsal caudal blotches faint, not extending onto sides of tail; small brown flecks on caudal fin; eye in life silvery bronze _P. euthysanota macrotympanum_ The _Ptychohyla euthysanota_ Group Three species in group; adults having moderate amount of webbing between fingers, and tarsal fold; breeding males having spinous, horny, nuptial tuberosities on pollex; mouths of tadpoles having lateral folds in lips and 4/6 or 4/7 tooth-rows; breeding call consisting of one long note. =Ptychohyla euthysanota= _Diagnosis._--Rostral keel absent; nuptial spines in males small; interorbital region much wider than eyelid. [Illustration: PLATE 12 _Ptychohyla euthysanota euthysanota_ (KU 58008). x 2.] =Ptychohyla euthysanota euthysanota= (Kellogg) _Hyla euthysanota_ Kellogg, Proc. Biol. Soc. Washington, 41:123-124, June 29, 1928 [Holotype.--USNM 73296 from Los Esemiles, Depto. Chalatenango, El Salvador; Ruben A. Stirton collector]. Mertens, Senckenbergiana, 33:169-171, June 15, 1952; Abhand. Senckenbergische Naturf. Gesell., 487:29, December 1, 1952. Stuart, Proc. Biol. Soc. Washington, 67:169, August 5, 1954. _Hyla rozellae_ Taylor, Univ. Kansas Sci. Bull., 28:78-80, pl. 9, fig. 1, May 15, 1942 [Holotype.--USNM 115039 from Salto de Agua, Chiapas, Mexico; Hobart M. and Rozella Smith collectors]. Taylor and Smith, Proc. U. S. Natl. Mus., 95:587, June 30, 1945. Smith and Taylor, Bull. U. S. Natl. Mus., 194:86, June 17, 1948. Stuart, Proc. Biol. Soc. Washington, 67:169, August 5, 1954.