266 U.S. NATIONAL l^USEUM BULLETIN 288 



be discerned on the light brown dorsal ground color. When present, 

 such blotches are apt to be more prominent anteriorly and sometimes 

 are fused to form a broad shield-like figure on the back, running from 

 between the eyes to the region of the sacral hump. Most often, how- 

 ever, this is broken up into individual blotches. Occasionally smaller 

 discrete blotches occur on the posterior half of the back posterior to 

 the sacral hump. In some specimens the dorsal surfaces of the shanks 

 and feet are crossed with about three fairly distinct dark crossbands; 

 in others the dorsal surfaces of the hind limbs are simply a moderate 

 brown with faint, scattered, pepper-like flecks. 



Generally, the ventral surface of this species is immaculate, but 

 in very large females occasionally there are small but distinct vermic- 

 ulations in dark brown scattered over the undersurface of the throat 

 and belly, but these are never so large, thick, or prominent as they 

 are in variabilis. 



On July 6, 1961, the junior author had the pleasure of collecting 

 topotypes of this species in company with Dr. Fred Medem and 

 Dr. Carlos Lehman, a grandson of the collector of the type series. 

 In life, the dorsal surface of H. columbiana is somewhat golden, with 

 the dorsal blotches a little darker. The patagium of the living indi- 

 viduals is red at night but fades to an orangish hue in daytime. 



ANSP 24402 is recorded as having been collected in the vicinity 

 of Bogota; however, since this specimen is certainly columbiana and 

 the species is not known from anywhere in the eastern range of the 

 Andes, the data must be in error. 



Specimens Examined 

 COLOMBIA 

 Cauca: Popayan, ANSP 25677, CJG 2274-8, CNHM 43933-80, 43982-91, 

 44050, 44109, 82005-7, MLS 192b, USNM 152081-2, 152146-51; El Tambo, 

 ANSP 25418; Quintana, CNHM 54719. 

 LOCALITY UNCERTAIN: ANSP 24402. 



16. parviceps group 



Small, brightly marked frogs with reduced webbing between the 

 fingers, small rounded vomerine teeth patches, and conspicuous mark- 

 ings on the thighs. The following key will help identify the only two 

 species of this group now known from Colombia: 



a 1 . A small patagium and an oval white spot on the anterior face of the thigh 

 that is bordered in black; belly light H. bokermanni 



a?. No patagium and without a distinct oval spot on the anterior face of each 

 thigh; belly dark H. parviceps 



Hyla bokermanni Goin 



Figure 26 



1960. Hyla bokermanni Goin, 1960a, p. 721 (type locality, Tarauaoa, Acre, 

 Brazil) . 



