bra_ will ultimately be found to be
specifically distinct from those in Surinam. Since I have no
osteological material from Central America, I have been unable to
describe the cranium in this account. Furthermore, I have no data on
the ecology and life history of _rubra_ in Central America.

_Distribution._--_Hyla rubra_ inhabits lowland tropical forests from
central-eastern Panama to northern South America and thence through
lowlands east of the Andes to northern Argentina (Fig. 6).

_Specimens Examined._--Panama: _Canal Zone_: Gatun, UMMZ 52720 (2);
Madden Dam, FMNH 67820; no specific locality, UMMZ 56517 (3), USNM
37863. _Colon_: Cerro Bruja, MCZ 13248. _Darien_: El Real, USNM
140569-70, 140573. _Panama_: Juan Diaz, MCZ 17973; Las Sabanas, MCZ
17581; Rio Trinidad, UMMZ 64003; San Pablo, MCZ 1398-9.

_Hyla elaeochroa_ Cope

_Hyla elaeochroa_ Cope, Jour. Acad. Nat. Sci. Philadelphia, 8:105,
1876 [Holotype.--USNM 30689, Sipurio, Limon Province, Costa Rica;
William M. Gabb collector]. Guenther, Biologia Centrali-Americana,
Reptilia and Batrachia, p. 265, June 1901. Taylor, Univ. Kansas
Sci. Bull., 35:859, July 1, 1952. Duellman, Univ. Kansas Publ.,
Mus. Nat. Hist., 17:270, June 17, 1966.

_Hyla quinquevittata_ Cope, Proc. Amer. Philos. Soc., 23:273,
April 1887 [Holotype.--USNM 14187, Nicaragua; J. F. Bransford
collector]. Guenther, Biologia Centrali-Americana, Reptilia and
Batrachia, p. 268, June 1901. Noble, Bull. Amer. Mus. Nat. Hist.,
38:340, June 1918.

_Hyla rubra_ (part): Dunn and Emlen, Proc. Acad. Nat. Sci.
Philadelphia, 84:25, March 22, 1932.

_Hyla dulcensis_ Taylor, Univ. Kansas Sci. Bull., 39:37, November
18, 1958 [Holotype.--KU 32168, Golfito, Puntarenas Province, Costa
Rica; Edward H. Taylor collector].

_Diagnosis._--Size medium (Male to 38 mm., Female to 40 mm.); skull
wider than long; nasals truncate anteriorly; frontoparietal fontanelle
moderate in size; snout slightly protruding; tympanum about size of
largest discs on fingers; dorsum marked by longitudinal stripes; dark
stripe between eye and nostril; in life tan to olive-green with or
without dark mark between eyes; bones greenish blue.

_Description._--Head flat, longer than wide; snout long, rounded,
protruding beyond mouth; canthus indistinct; length of eye equal to
interorbital distance; loreal region not pronounced; tympanum distinct
and about two-fifths diameter of eye