FROGS OF COLOMBIA — COCHRAN AND GOIN 325 



and with just a hint of a notch. Snout short, not prominent, rounded 

 when viewed from above, tip slightly rounded in profile, the upper 

 jaw extending but little beyond lower; nostrils more lateral than 

 superior, but slightly projecting, their distance from end of snout 

 about two-thirds that from eye, separated from each other by an 

 interval equal to about three-fourths their distance from eye. Canthus 

 rostralis not strongly defined; loreal region concave and somewhat 

 oblique, the upper lip flaring out distinctly below it. Eye neither 

 large nor prominent, its diameter equal to its distance from nostril; 

 palpebral membrane not reticulate; interorbital distance about equal 

 to width of upper eyelid, which is slightly greater than distance 

 between nostrils. Tympanum very distinct, about three-fourths the 

 diameter of eye, separated from eye by a distance nearly equal to 

 one-half its own diameter. Fingers webbed at base, web reaching distal 

 third of antepenultimate phalanx of third finger, fourth finger a 

 little longer than second, reaching to middle of disk of third which 

 just snugly covers the tympanic area; no projecting rudiment of a 

 pollex; no ulnar ridge. Toes slightly more than one-half webbed, 

 the web on fourth toe reaching the middle of penultimate phalanx, 

 third and fifth toes subequal, disk of fourth toe covering about 

 two-thirds the tympanic area; a distinct oval inner and a smaller 

 but equally distinct rounded outer metatarsal tubercle; no tarsal 

 ridge; no dermal appendage on heel. Body rather elongate, in post- 

 axillary region about equal greatest width of head; when hind leg is 

 adpressed, heel reaches almost to eye; when limbs are laid along the 

 side, knee and elbow fail to meet; when hind legs are bent at right 

 angles to body, heels overlap slightly. No patagium. Skin of upper 

 parts somewhat glandular, skin on top of head and shoulders thicker 

 than skin on back; a distinct glandular ridge passes down at an angle 

 over the tympanum and towards the insertion of arm; skin of throat, 

 chest, belly, and lower surface of thigh uniformly granular; traces 

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

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



Dimensions.-— Head and body, 94.5 mm.; head length, 24 mm.; head 

 width, 31.8 mm.; femur, 42.8 mm.; tibia, 46.7 mm.; heel-to-toe, 64.2 

 mm.; hand, 29.2 mm. 



Color in alcohol. — Dorsum pale brown, ventral surfaces a cadaverish 

 gray-brown. At first glance this frog seems to be absolutely uniform in 

 color above, but on close inspection rather widely spaced wart-like 

 pustules on the back can be seen to be darker in color than the rest of 

 the dorsum. 



Remarks. — This large species seems to be endemic to the Maracaibo 

 Basin. The two specimens recorded here are the first to be taken in the 

 portion of the basin belonging to Colombia. P. ingens, however, does 



337-262—70 22 



