208 U.S. NATIONAL MUSEUM BULLETIN 288 



that of belly and lower surface of thigh uniformly and finely granular ; 

 no trace of a skinfold across chest; no vocal sac. Skin of head not 

 co-ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 48.2 mm.; head length, 17.6 mm.; 

 head width, 17.6 mm.; femur, 25.4 mm.; tibia, 28.8 mm.; heel-to-toe, 

 35.5 mm.; hand, 14.3 mm. 



Color in alcohol. — Light brown above, yellowish gray below. A 

 narrow dark stripe lies on each canthus, and a similar stripe originates 

 at tip of snout and passes posteriorly between the eyes and fades out 

 above the tympanum. The posterior part of side, anterior and posterior 

 faces of thigh, and inner face of shank heavily marbled with black. 

 Immaculate below. 



Remarks. — Several workers (Boulenger, 1882, p. 359; Nieden, 1923, 

 p. 306; Crawford, 1931, p. 34) have synonymized Hyla fasciata 

 Giinther and Hyla calcarata Troschel. While there can be no doubt 

 that these are closely related forms, we do not believe they may be 

 appropriately synonymized. A study of the type of fasciata (BM 

 58.7.25.22) shows that it differs from the specimens of calcarata at 

 hand as follows: the canthus rostralis more strongly defined; loreal 

 region much less oblique; tympanum only one-third rather than one- 

 half the diameter of eye; digital disk of third finger covers entire 

 tympanum instead of only two-thirds of it; web on fourth toe extends 

 to distal third of penultimate phalanx instead of failing to reach the 

 penultimate phalanx; dermal appendage on heel short and triangular 

 instead of long and spur-like, It seems to us that these differences are 

 too significant to permit synonymizing the two forms. 



While we have not examined very much material, from specimens 

 we have seen it appears likely that calcarata is a lowland form ranging 

 from the Guianas to the eastern slopes of the Andes, while fasciata is a 

 more montane form occurring in the Andes proper. Whether the two 

 are simply geographic races of a single species cannot be determined 

 until additional material has been studied. 



Lutz and Kloss (1952, p. 647) report that their specimen from 

 Benjamin Constant, Brazil, was found between two bromeliad leaves 

 on a fallen tree. This locality is just across the river from Leticia, 

 Colombia. 



Specimens Examined 



COLOMBIA 



Caqueta: Rio Mecaya, CNHM 69715. 



Meta: Serranfa de La Macarena, CNHM 81333-4; Villavicencio, CJG 2353. 



Putumayo: Puerto Asfs on upper Rio Putuuiayo, USN 152279. 



Vichada: Amanaven, USNM 152317. 

 BRITISH GUIANA: Matanuki River, BM 1936.4.2.35; New River, BM 

 1939.1.1.61. 



