FROGS OF COLOMBIA — COCHRAN AND GOIN 481 



snout moderately long, rounded when seen from above and in profile, 

 the upper jaw projecting considerably beyond the lower; nostrils 

 superolateral, their distance from end of snout one-half their distance 

 from eye, separated from each other by an interval equal to their 

 distance from eye. Can thus rostralis not very prominent, rounded, 

 the loreal region flat, sloping outwards to upper lip. Eye moderate, 

 prominent, its diameter about five-sixths its distance from tip of 

 snout; interorbital diameter 1% times the width of upper eyelid, 

 equal to interval between nostrils. Tympanum small and not at all 

 distinct, especially its posterior border, apparently about one-third 

 the eye diameter and separated from the eye by a distance nearly 

 equal to its own diameter. Fingers rather long, free, with small lateral 

 ridges and bulbous tips, first, second, and fourth fingers subequal; 

 a prominent oval tubercle at base of thumb and another similar to 

 it on palm; metacarpal tubercles large and prominent; toes free, 

 ridged laterally, their tips less bulbous than those of the fingers, 

 third much longer than fifth, extending halfway on antepenultimate 

 phalanx of fourth; metatarsal tubercles small but distinct, somewhat 

 compressed, the inner one slightly larger than the outer; a small 

 tarsal tubercle at about one-third the distance from inner metatarsal 

 tubercle to heel, and separated from the inner one by a distance greater 

 than that separating the two metatarsals; a large flat inguinal 

 gland, nearly concealed when hind legs are folded. Body elongate, 

 in postaxillary region equal to greatest width of head; when hind 

 legs are adpressed, heel fails to reach posterior corner of eye, and 

 metatarsal tubercles just reach the tip of snout; when limbs are laid 

 along the body, heel and elbow overlap, when hind legs are placed at 

 right angles to body, heels slightly overlap. Skin of upper parts 

 minutely glandular, with a pair of lateral folds from posterior corner 

 of eye along the sides, fading out before reaching groin; venter smooth, 

 with a very pronounced ventral disk; area behind anus and on pos- 

 terior femur coarsely granular. Male with a very large vocal sac 

 extending across throat and with a semicircular fold at each side 

 when sac is deflated; dark thumb patches also present in the male. 



Dimensions. — Head and body, 30 mm.; head length, 9 mm.; head 

 width, 9.5 mm.; femur, 12 mm.; tibia, 13 mm.; foot, 13.5 mm.; hand, 

 8.5 mm. 



Color in alcohol. — Dorsum sepia, the lateral folds and supratym- 

 panic ridges clove brown; a dark W-shaped area between the shoulders, 

 followed by a paler sepia oval spot; indistinct darker marblings on 

 posterior part of back; arms and legs fawn color, with wide indistinct 

 darker bars; a small black spot on upper forearm, on outer tibia, and 

 several such spots along outer anterior surface of femur, but none on 

 inguinal gland, which is clove brown; a clove brown stripe along pos- 



