FROGS OF COLOMBIA — COCHRAN AND GOIN 15 



distinct, slightly rounded; loreal region flat, vertical, in line with 

 upper lip. Eye large, prominent, its diameter 1% times its distance 

 from tip of snout; interorbital diameter 1% times that of upper eyelid, 

 equal to interval between nostrils. Tympanum distinct anteriorly, 

 its greatest diameter about three-fifths that of eye, separated from 

 eye by an interval equal to about one-eighth its own diameter; a 

 swollen area behind tympanum partly obscuring its upper posterior 

 border. Fingers rather long, with moderate disks and heavy lateral 

 ridges, free, first finger longer than second or fourth, its tip reaching 

 almost midway on penultimate phalanx of third, the disk of which 

 covers a little less than one-fourth the tympanum; a very small round 

 thumb pad present; a large palmar callus; metacarpal tubercles well 

 developed. Toes long, third toe longer than fifth, its disk reaching 

 halfway on antepenultimate phalanx of fourth; disk of fourth toe 

 covering less than one-fourth the tympanum, and equal to that of 

 third finger; a small oval inner metatarsal tubercle, and a smaller 

 round outer one; a tarsal ridge ending in a diagonal bar and enlarged 

 tubercle about two-thirds the distance from inner metatarsal tubercle 

 to heel; a pronounced skinfold on heel and knee. Body elongate, 

 slender; in postaxillary region narrower than greatest width of head. 

 When hind leg is adpressed, heel reaches a point between eye and 

 nostril, and tarsometatarsal articulation reaches far beyond snout; 

 when limbs are laid along the sides, knee and elbow overlap; when 

 hind legs are bent at right angles to body, heels overlap. Skin of 

 upper parts granular, less so on snout and just above dorsolateral 

 stripes; venter with very indistinct granules and more distinct transverse 

 glands across belly; throat and sides nearly smooth; posterior femur 

 and post-anal region granular; no glandular ridge behind eye; a skin- 

 fold across the chest; a slight ventral disk; no external vocal sacs in 

 the male. 



Dimensions. — Head and body, 43.5 mm.; head length, 13.5 mm.; 

 head width, 12 mm.; femur, 17.5 mm.; tibia, 20.5 mm.; foot, 17.5 

 mm.; hand, 11.5 mm. 



Color in alcohol. — Dorsum blackish slate; snout and anterior third 

 of eyelids gray; a narrow gray dorsolateral stripe running back from 

 head, passing above tympanum, and continuing to groin; venter and 

 sides blackish slate, unspotted; side of head slate, with a paler border 

 along upper lip; palms of hands and soles of feet olive-gray, their 

 tubercles and disks pale drab-gray. 



Remarks.' — This frog is one of the most readily recognized of the 

 Colombian Dendrobates because the first finger is longer than the 

 second — a reversal of finger-length relationships found in other 

 Colombian species except ingeri. Its back is granular, and the dark 

 slate color of its entire body when preserved contrasts with the 



