308 U.S. NATIONAL MUSEUM BULLETIN 2 88 



loreal regions, upper lips, top of arms, hands, lower legs, and feet — is a 

 pale yellowish gray overlain by large, chocolate brown spots that so 

 closely approach one another that they leave but a reticulated network 

 of the pale ground color. The dorsal pattern is very similar to that of 

 the reticulated giraffe. There is a trace of the pattern on the dorsal 

 margin of thigh but the remainder of thigh is immaculate. All ventral 

 surfaces are a pale cadaverish gray. 



Variation. — The six Colombian specimens at hand, all from the 

 same general vicinity west of Florencia, show much variation in 

 dorsal pattern. In two of the specimens the dark spots on the back 

 are placed close together so that the light background between them 

 forms a network of narrow lines; thus, the dorsal pattern is extremely 

 reminiscent of the pattern of a reticulated giraffe. In the other four 

 individuals the dorsal spots are smaller, more rounded, and more 

 widely scattered, giving the impression of a pale frog with dark 

 spots on the dorsum. In the three specimens in which the facial 

 pattern has not faded the reticulate pattern on the side of the face 

 is quite marked, although one specimen has a dorsal pattern of 

 discrete, rounded, dark spots. The pattern in the specimens with 

 the fewest dorsal spots approaches that in H. laynei from Leticia, 

 and that species eventually may prove to be a race of H. reticulata 

 restricted to the lowlands of the Amazon basin and that typical 

 reticulata will be considered a form more characteristic of the eastern 

 slopes of the Andes. 



Remarks. — Based on its description, Hyla favosa Cope seems to 

 be a synonym of this species, but we have not seen the type of favosa 

 and indeed do not know if it is extant. 



Specimens Examined 

 COLOMBIA 



Caqueta: Ceilan, west of Florencia, MLS 25, 25a, 25b; Morelia, west of 



Florencia, ANSP 25415-7. 

 ECUADOR: Napo-Pastaza: Rio Sandalias, EPN 2972; Lagarto Cocha, EPN 



2850. 

 PERU: Pebas, SUNHM 6322-3, 12621. Loreto Department: Yarenacocha, 



Ucayali Province, CNHM 45434; Rfo Ucayali, Pucallpa, CNHM 56198. 



Hyla laynei Goin 



Figure 35 



1957. Hyla laynei Goin, p. 61 (type locality, Leticia, Amazonas, Colombia). — 

 Goin and Layne, 1958, p. 107. 



Diagnosis. — A small, brightly colored frog of the leucophyllata 

 group with a pattern of dark rounded spots on a pale brown or tan 

 background. 



H. laynei can be distinguished at a glance from all other frogs in 

 this group except H. reticulata by the dorsal dark spots. It differs 



