_Remarks._--This species has been confused with _Hyla microcephala underwoodi_ by many workers. Dunn (1931, 1933, 1934) and Breder (1946) referred Panamanian specimens of _H. phlebodes_ to _H. underwoodi_; likewise, Gaige, Hartweg, and Stuart (1937) made the same error. Cole and Barbour (1906) and Kellog (1932) used the name _H. phlebodes_ for Mexican specimens of _H. microcephala underwoodi_. The similarity in color pattern of _H. microcephala underwoodi_ and _H. phlebodes_ easily accounts for the misapplication of names. Although both species have nearly identical dorsal color patterns, that of _H. microcephala underwoodi_ usually is bolder. Furthermore, in that species a narrow white line usually is present above the well-defined lateral dark stripe, whereas the lateral dark stripe is short and posterior to the eye is not bordered above by a white line in _H. phlebodes_. The type locality "San Carlos, Costa Rica" given by Stejneger (1906:817) apparently refers to a region, the Llanuras de San Carlos, in the northern part of Alajuela Province, Costa Rica. [Illustration: Fig. 3. Map showing locality records for _Hyla phlebodes_.] _Distribution._--_Hyla phlebodes_ inhabits humid tropical forests from southeastern Nicaragua southeastward on the Caribbean slopes and lowlands to the Canal Zone in Panamá, thence eastward in the Chucunaque Basin of eastern Panamá and onto the Pacific lowlands of Colombia (Fig. 3). The species also reaches the Pacific slopes in the Arenal Depression in northwestern Costa Rica and in the Panamanian isthmus, where it occurs in humid forests on the Pacific slope of El Valle and Cerro La Campana. Mostly the species is found at low elevations, but it occurs at 600 meters at Turrialba and at 700 meters at Finca San Bosco in Costa Rica. _Specimens examined._--410, as follows: +Nicaragua+: Zelaya: Isla Grande del Maíz, MCZ 14848; Río Mico, El Recrero, UMMZ 79720 (6).