FROGS OF COLOMBIA — COCHRAN AND GOLN 273 



reaches to tip of snout; when limbs are laid along the side, knee and 

 elbow overlap considerably; when hind legs are bent at right angles to 

 body, heels overlap considerably. A large, well-developed patagium 

 extends from back of upper arm to side of body. Skin of upper parts 

 glandular, and somewhat roughened with several well-developed 

 warty protuberances on each side in the region above the posterior 

 termination of the flare of the patagium. On each side the patagium 

 continues to the groin as a thin fold of skin. A well-developed, narrow, 

 glandular ridge encircling upper part of tympanum; skin of throat and 

 chest very finely granular, that of belly and lower surface of thigh 

 uniformly and more coarsely granular; a well-developed skinfold across 

 chest; adult male, vocal sac hardly apparent. Skin of head not co- 

 ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 35.5 mm.; head length, 10.8 mm.; 

 head width, 11.7 mm.; femur, 17.9 mm.; tibia, 21.5 mm.; heel-to-toe, 

 26.5 mm.; hand, 11.5 mm. 



Color in alcohol. — A strikingly marked frog, dark above and 

 patterned below. The dorsal ground color is very dark brown with a 

 nearly imperceptible dorsal figure of darker brown. This incon- 

 spicuous dorsal figure starts at the posterior margin of each eye as 

 a sort of Y-shaped mark, the arms of which come together above the 

 shoulders; the base of the "Y" continues posteriorly to terminate 

 between the sacral hump and the groin. In the middle of the back 

 the base of the Y-shaped mark is very broad and contains a light 

 spot of the paler ground color. The entire surface of the chin, throat, 

 and belly, the undersides of forearms, the anterior, posterior, and 

 ventral surfaces of thighs, the underside of ulnar and tarsal ridges, 

 the patagium, and the webbing on hands and feet are bright yellow. 

 The yellow of the chin, throat, belly, and thighs is thickly covered 

 with very distinct, discrete, rounded, coal-black spots that range 

 from one-half millimeter to two millimeters in diameter. The under- 

 sides of forearms, hands (except the webbing), shanks, and feet 

 (except the webbing) are black. 



Remarks. — The specimens from just east of the Andes in Colombia 

 and Ecuador seem remarkably uniform. 



At least three other nominal forms have been assigned to close 

 relationship with Hyla marmorata. Cochran (1955, p. 174) placed 

 senicula Cope (type locality, Corcovada, Rio de Janeiro) as a sub- 

 species of marmorata and made dasynota Giinther (type locality, 

 Brazil) a synonym of senicula. Rivero (1926, p. 127) considered 

 melanargyrea Cope (type locality, Mato Grosso, Brazil) as a sub- 

 species of marmorata separate from senicula. We recently studied a 

 co type of melanargyrea (ANSP 11216) and the type of dasynota 

 (BM 68.11.16.3 [1947.2.31.3]) but we have not seen enough material 



