Ventral aspect of right feet of _Smilisca_: (A) _S. baudini_ (KU 87177); (B) _S. phaeota_ (KU 64276); (C) _S. cyanosticta_ (KU 87199); (D) _S. sordida_ (KU 91761); (E) _S. puma_ (KU 91716), and (F) _S. sila_ (KU 77408). x3.] [Illustration: PLATE 6 A B C Living _Smilisca_: (A) _S. baudini_ (UMMZ 115179) from 1.7 km. W Xicotencatl, Tamaulipas, Mexico; (B) _S. cyanosticta_ (UMMZ 118163) from Volcan San Martin, Veracruz, Mexico; (C) _S. phaeota_ (KU 64282) from Barranca del Rio Sarapiqui, Heredia Prov., Costa Rica. All approx. nat. size.] [Illustration: PLATE 7 A B C Living _Smilisca_: (A) _S. puma_ (KU 65307) from 5.9 km. W. Puerto Viejo, Heredia Prov., Costa Rica; (B) _S. sila_ (KU 77407) from Finca Palosanto, 6 km. WNW El Volcan, Chiriqui, Panama; (C) _S. sordida_ (KU 64257) from 20 km. WSW San Isidro el General, San Jose Prov., Costa Rica. All approx. nat. size.] [Illustration: PLATE 8 FIG. 1. Breeding site of _Smilisca baudini_, 4 km. WNW of Esparta, Puntarenas Prov., Costa Rica. FIG. 2. Breeding site of _Smilisca phaeota_, Puerto Viejo, Heredia Prov., Costa Rica.] [Illustration: PLATE 9 FIG. 1. Breeding site of _Smilisca puma_, 7.5 km. W of Puerto Viejo, Heredia Prov., Costa Rica. FIG. 2. Breeding site of _Smilisca sordida_, Rio La Vieja, 30 km. E of Palmar Norte, Puntarenas Prov., Costa Rica.] [Illustration: PLATE 10 Audiospectrographs and sections of breeding calls of _Smilisca_: (A) _S. baudini_ (KU Tape No. 74); (B) _S. cyanosticta_ (KU Tape No. 373); (C) _S. phaeota_ (KU Tape No. 79).] [Illustration: PLATE 11 Audiospectrographs and sections of breeding calls of _Smilisca_: (A) _S. puma_ (KU Tape No. 382); (B) _S. sila_ (KU Tape No. 385); (C) _S. sordida_ (KU Tape No. 398).] [Illustration: PLATE 12 Lateral views of the heads of _Smilisca_: (A) _S. baudini_ (KU 87177); (B) _S. sordida_ (KU 91765); (C) _S. phaeota_ (KU 64276); (D) _S. puma_ (KU 91716); (E) _S. cyanosticta_ (KU 87199); (F) _S. sila_ (KU 77408). x3.2.] Aside from the skeleton referred to as _Smilisca daulinia_ by Cope (1865:194), we have examined each of the types of the species synonymized with _S. baudini_. All unquestionably are representatives of _S. baudini_. Taylor (1942:306) named _Hyla beltrani_ from Tapachula, Chiapas. This specimen (UIMNH 25046) is a small female (snout-vent length, 44 mm.) of _S. baudini_. Taylor (1954:630) named _Hyla manisorum_ from Batan, Limon, Costa Rica. The type (KU 34927) is a large female (snout-vent length, 75.3 mm.) _S. baudini_. In this specimen and a male from Suretka, Costa Rica, the usual dorsal color pattern is absent, but the distinctive curved supraorbital processes, together with other structural features, show that the two specimens are _S. baudini_.