s; webbing of feet mottled with brown.

_Variation._--Twenty-eight breeding males from the area between Chepo
and Tocumen, Panama, have snout-vent lengths of 39.0 mm. to 46.0 mm.
(mean 42.5 mm.). In these specimens, the ratio of the tibia length
to the snout-vent length is 0.54 to 0.61 (mean, 0.57); the ratio
of the diameter of the tympanum to that of the eye is 0.55 to 0.75
(mean, 0.67). One female has a snout-vent length of 41.0 mm.,
tibia/snout-vent length ratio of 0.57, and tympanum/eye ratio of 0.76.
Two to five (usually three) elongate black spots are present in the
scapular region in different individuals. The flanks in some are
spotted with brown; in others they are creamy white. A small black
spot is present in the groin of some specimens. Usually two to four
blotches are present on the anterior and posterior surfaces of the
thighs; in some specimens the blotches are reduced to small spots. One
or two brown spots are present proximally on the shanks in most
specimens. In some individuals tuberculations are scattered on the
head and in the tympanic and scapular regions, but the dorsum is
smooth in most specimens; the belly is creamy white flecked with
brown.

_Cranial Osteology._--The skull of _Hyla foliamorta_ is flat and
longer than it is wide. The premaxillary is small and bears 13 to 16
teeth (mean for 2 specimens, 14.8). The alary process of the
premaxillary is vertical and concave posteriorly. Ventrally, the
premaxillary is completely separated from the prevomer by cartilage.
The maxillary is slender; each bears 77 to 84 teeth (mean for 2
specimens, 81). The pars facialis of the maxillary is laterally convex
and less than three times the height of the pars dentalis.

The nasal is large and pointed anteriorly and posteriorly in dorsal
view. The length of the nasal comprises about 40 per cent of the total
length of the skull. The nasals are separated anteromedially by the
cartilaginous septum nasi. One protuberance is present on the
midlateral concavity of the nasal. Posteriorly, the nasal overlaps the
sphenethmoid; posterolaterally the nasal articulates with the
palatine. The sphenethmoid is completely ossified and pentagonal in
dorsal view. The frontoparietal is elongate, without a pronounced
anterior supraorbital process. The frontoparientals are sutured
medially throughout their lengths; the frontoparietal fontanelle is
absent.

The bony part of the prooetic is narrowly separated dorsolaterally from