FROGS OF COLOMBIA — COCHRAN AND GOIN 69 



penultimate phalanx of fourth; disk of fourth toe covering about 

 one-third the tympanum and about the same size as that of third 

 finger; a weak oval inner metatarsal tubercle and a more distinct, 

 rounded outer one; a heavy tarsal ridge, ending diagonally midway to 

 heel; a distinct skinfold on heel and knee. Body moderately slender, 

 in postaxillary region a little narrower than greatest width of head. 

 When hind leg is adpressed, heel reaches tip of snout; when limbs are 

 laid along the sides, knee and elbow greatly overlap; when hind legs 

 are bent at right angles to body, heels barely touch. Skin of upper 

 parts resistant to abrasion, smooth to pustular, with some very weak 

 tubercles on sacrum; venter smooth; an indistinct, wide glandular 

 ridge from posterior corner of eye above tympanum, ending above 

 shoulder; no skinfold across the chest; a slight ventral disk; no ex- 

 ternal vocal sacs in this specimen. 



Dimensions. — Head and body, 22.5 mm.; head length, 7.5 mm.; 

 head width, 7.5 mm.; femur, 11 mm.; tibia, 11.5 mm.; foot, 9.5 mm.; 

 hand, 6 mm. 



Color in alcohol. — Back olive-gray with a wide, blackish slate, 

 middorsal stripe beginning on the snout and continuing to occiput; 

 a wide slate chevron mark above the shoulders dividing posteriorly 

 into two dark stripes enclosing a light central area on the lumbar 

 region and widening and becoming irregular on the sacral region; 

 venter immaculate pale cream-buff; side of body pale olive-gray with 

 small dark dots, especially concentrated below a light diagonal line 

 entering the groin but not extending forward beyond the level of 

 the adpressed elbow; arms and legs very light drab-gray with three 

 (on tibia) or four (on femur) wide slate crossbars; side of head olive- 

 gray, with a slate-black stripe from nostril to eye through loreal 

 region, continuing behind eye on wide supratympanic ridge and curv- 

 ing upward and around arm insertion to mark a pale semicircle around 

 the axilla; posterior femur with a pearl gray irregular stripe limited 

 above by the ends of the crossbars and below by some scattered 

 slate-gray spots; soles of feet and palms of hands olive-gray, the webs 

 between the toes white, and the disks slate-gray. 



Remarks. — This young specimen from the type locality agrees 

 reasonably well with the type description, except in a few points. 

 Its back is smooth to pustular, with a few very weak granules on the 

 sacrum, while the type has the back finely granular. This difference 

 may result from age and manner of preservation, as do the differences 

 in size of finger and toe disks. The young specimen is darker, but the 

 chevron mark above the shoulders that appears in the figure of the 

 type, as well as some dark spots on the top of the head, may represent 

 the dark middorsal head stripe of the former. 



Two examples from Pueblo Nuevo near Nilo, not far from the type 



337-262—70 6 



