rested lowlands in locally humid areas in Guanacaste Province, Costa
Rica, and in the humid Golfo Dulce region of Costa Rica; it occurs on
the Carribbean lowlands from central Nicaragua to South America, where
it ranges to Guyana and Ecuador. The highest elevations where _H.
boulengeri_ has been found are 620 meters at Turrialba, Cartago
Province, and 700 meters at Tilaran, Guanacaste Province, Costa Rica
(Fig. 4).

_Specimens Examined._--Costa Rica: _Alajuela_: 9 km N Ciudad Quesada,
near La Florencia, USC 8059 (4); 18 km N Florencia, USC 2624; Laguna
Monte Alegre, KU 64334; Las Playuelas, 11 km S Los Chiles, USC 7216,
7217 (2), 7219; 3 km NE Muelle del Arenal, USC 2644 (5). _Cartago_:
Turrialba, KU 24741. _Guanacaste_: 7 km N Liberia, USC 8096 (2), 8138
(6); 13.6 km N Liberia, USC 8151, 8171 (2); 20.5 km S Liberia, USC
8205; Taboga, 20 km SE Las Canas, KU 102170, USC 7166; 4 km NE Tilaran,
USC 8023; 6 km NE Tilaran, USC 523 (3), 6262, 7019. _Heredia_: Puerto
Viejo, KU 64323-7 (skeletons), 104351-3 (skeletons), 64330-3,
103592-620; 1 km NE Puerto Viejo, UMMZ 126042; 1 km S Puerto Viejo, KU
84983-4 (skeletons), 86317-22, 87774 (skeleton); 4.2 km W Puerto Viejo,
KU 64329, 64328 (skeleton). _Limon_: Mountain Cow Creek, near Banano,
KU 37031, 41067 (skeleton); 3 km S Rio Tortuguero, AMNH 69057; Suretka,
KU 36482-8, 36699. _Puntarenas_: 4.8 km S Bahia Rincon on NW side Rio
Rincon, USC 705; Parrita, USC 6163; 4.5 km W Rincon de Osa, KU
102177-9, 104295-6 (tadpoles); 6 km SW Rincon de Osa, KU 102171-6; 4.4
km NW Villa Neilly, USC 8003; 10.5 km WNW Villa Neilly, KU 64321. _San
Jose_: 21 km WSW San Isidro el General, KU 34104-6.

[Illustration: Fig. 4. Map showing locality records for _Hyla
boulengeri_ (circles) and _H. foliamorta_ (dots).]

Panama: _Bocas del Toro_: 3.2 km W Almirante, KU 95978. _Canal Zone_:
Barro Colorado Island, FMNH 13379; near Clayton Reservation, UIMNH
42000; 2.6 km SW Fort Kobbe, KU 95977; Miraflores Locks, AMNH 69764-5;
Summit, AMNH 73445, KU 97777, 101540-9, 104350 (skeleton). _Colon_: Rio
Gatuncillo, near Nuevo San Juan, KU 95976. _Darien_: El Real, KU
80451-3.

_Hyla foliamorta_ Fouquette

_Hyla foliamorta_ Fouquette, Herpetologica, 14:125, April 25,
1958 [Holotype.--TNHC 23109, 11 km. NW Miraflores Locks, Canal
Zone, Panama; M. J. Fouquette, Jr. collector].

_Diagnosis._--Size medium (Male to 43 mm., Female to 41 mm.); skull
longer than wide; frontoparietal fontanelle absen