252 U.S. NATIONAL MUSEUM BULLETIN 2 88 



Diagnosis. — A frog of the labialis group with a well-developed 

 patagium which is bright blue in life. 



This subspecies differs from Hyla labialis hausi in having shorter 

 legs and the length of the crus less than half the head-body length. 

 It differs from H. I. platydactyla in having the groins and the posterior 

 surfaces of the thighs uniform or lightly speckled but not distinctly 

 mottled. 



Description. — USNM 95155, from Bogota, Cundinamarca, Colom- 

 bia. Vomerine teeth in two small, rounded patches, lying close together 

 between the small, rounded choanae; tongue one-half as wide as mouth 

 opening, thick, broadly rounded, its posterior border slightly free 

 and very shallowly notched. Snout short, somewhat triangular when 

 viewed from above, slightly rounded in profile, the upper jaw extending 

 but little beyond lower; nostrils as lateral as superior, not projecting, 

 their distance from end of snout about one-half that from eye, sepa- 

 rated from each other by an interval equal to about their distance from 

 eye. Can thus rostralis moderately defined; loreal region nearly flat and 

 slightly oblique, the upper lip flaring out a little below it. Eye small, 

 not prominent, its diameter equal to its distance from nostril; pal- 

 pebral membrane not reticulate; interorbital distance slightly greater 

 than width of upper eyelid and slightly greater than distance between 

 nostrils. Tympanum distinct, about one-half the diameter of eye, 

 separated from eye by a distance equal to its own diameter. Fingers 

 webbed at base, the web reaching base of antepenultimate phalanx 

 of third finger, fourth finger considerably longer than second, just 

 reaching to disk of third whioh covers about one-half the tympanic 

 area; no projecting rudiment of a pollex; no ulnar ridge. Toes slightly 

 less than one-half webbed, the web on fourth toe reaching base of 

 penultimate phalanx, third and fifth toes subequal, disk of fourth toe 

 covering about one-half the tympanic area; a distinct oval inner and 

 a smaller but distinct rounded outer metatarsal tubercle; no outer 

 but a weak inner tarsal ridge; no dermal appendage on heel. Body 

 short and stout, in postaxillary region about equal greatest width of 

 head; when hind leg is adpressed, heel reaches tip of snout; when 

 limbs are laid along the side, knee and elbow overlap appreciably; 

 when hind legs are bent at right angles to body, heels overlap con- 

 siderably. A distinct patagium extends from the back of the upper 

 arm to the side of the body. Skin of upper parts smooth; a rather 

 narrow, glandular ridge encircling upper part of tympanum; skin of 

 throat and chest somewhat wrinkled in appearance, that of belly 

 and lower surface of thigh uniformly and coarsely granular; a well- 

 developed skinfold across chest; adult female, no vocal sac. Skin of 

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



