The two subspecies exhibit few differences in size and proportions, except that the tympanum is larger in _pseudopuma_ (Table 1). _Hyla p. pseudopuma_ has dark brown or yellowish tan thighs and brown flanks with a few creamy white spots; the groin in some specimens is pale blue. The red color on the limbs characteristic of _infucata_ is lacking in _pseudopuma_, which also lacks the white stripe above the anus characteristic of _infucata_. The only noticeable morphological difference between the subspecies, except in the size of the tympanum, is the shape of the snout. In _infucata_ the snout is bluntly rounded in lateral profile and truncate in dorsal profile, whereas in _pseudopuma_ the snout is more acutely rounded in lateral profile and acuminate in dorsal profile (Fig. 1). This external difference is correlated with the nature of the underlying premaxillaries. In _infucata_ the premaxillaries lie in a transverse plane and have short, nearly vertical alary processes, whereas in _pseudopuma_ the premaxillaries lie at a slight angle and have longer alary processes that are inclined posteriorly. TABLE 1.--Variation in Certain Measurements and Proportions in the Subspecies of Hyla pseudopuma. (Means Are Given in Parentheses Below the Observed Range.) ==================+========+==+==========+==========+==========+========== | | |Snout-vent| Tibia | Foot | Tympanum/ SUBSPECIES | Sex | N| length | length/ | length/ | eye | | | | S-V L | S-V L | ------------------+--------+--+----------+----------+----------+---------- _H. p. pseudopuma_|[Male] |31| 37.6-41.4| 48.5-55.0| 44.7-52.9| 47.6-66.7 |[symbol]| | (39.7) | (51.5) | (48.2) | (57.6) | | | | | | _H. p. infucata_ |[Male] |31| 37.6-42.9| 50.7-56.9| 43.3-49.5| 41.8-55.3 |[symbol]| | (39.5) | (53.4) | (47.4) | (49.2) | | | | | | _H. p. pseudopuma_|[Female]|11| 41.6-47.6| 49.1-53.8| 45.4-49.5| 57.9-71.4 |[symbol]| | (44.3) | (51.7) | (47.6) | (60.2) | | | | | | _H. p. infucata_ |[Female]|11| 41.1-45.6| 50.0-55.4| 43.5-47.4| 47.6-56.1 |[symbol]| | (42.6) | (52.6) | (45.8) | (50.1) ------------------+--------+--+----------+----------+----------+---------- [Illustration: FIG. 1. Lateral views of the heads of _Hyla pseudopuma pseudopuma_ (left, KU 64884) and _H. p. infucata_ (right, KU 101784). x 4.]