FROGS OF COLOMBIA — COCHRAN AND GOIN 31 



upper Rio Atrato, USNM 144945; Pacific coast, MLS 227; 10-15 km. west 

 of Playa de Oro, Rio San Juan, USNM 147164-203, 150626-9; Quibdo, 

 MLS 145, 145a; Rio San Juan, USNM 144946; Rio Sucio, tributary of the 

 lower Rio Atrato, USNM 144947; Upper Condoto, BM 1913.11.12.90-3. 



Dendrobates tinctorius chocoensis (Posada Arango) 



Plate 4a-c 



1869. Phyllobates chocoensis Posada Arango (type locality, Choco, Colombia). — 



Deyrolle, 1872, p. 465, pi. 27. 

 1913. Dendrobates tinctorius chocoensis. — Boulenger, 1913, p. 1028, pi. 104 



figs. 5, 6. — Laurent, 1942, p. 12. 



Description. — USNM 124264, an adult from three miles east of 

 Andagoya, on the road to Opogod6, Choc6 Colombia. Tongue 

 about one-third as wide as mouth opening, ovate, long, its posterior 

 border free and unnotched; snout broadly rounded at the tip when 

 viewed from above, flat and sloping backwards in profile, the upper 

 jaw extending well beyond the lower. Nostrils inferolateral, scarcely 

 projecting, their distance from end of snout about two-thirds their 

 distance from eye. Can thus rostralis rounded; loreal region slightly 

 concave, vertical, and in line with the upper lip. Eye large, prominent, 

 its diameter equal to its distance from tip of snout; interorbital 

 diameter twice that of upper eyelid, about 1% times the interval 

 between nostrils. Tympanum rather indistinct posteriorly, its greatest 

 diameter about two-thirds that of eye, separated from eye by an 

 interval equal to one-fourth its own diameter. Fingers moderate, with 

 large disks but no lateral ridges, free, first finger a trifle shorter 

 than second and fourth; tips of second and fourth fingers extending 

 to base of penultimate phalanx of third, the disk of which covers 

 about one-third the tympanum; a small swollen area in place of a 

 definite thumb pad; a small palmar callus; metacarpal tubercles only 

 slightly developed. Toes rather short, third toe longer than fifth, its 

 disk reaching halfway on antepenultimate phalanx of fourth toe, the 

 disk of which covers one-third the tympanum and equals that of 

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

 round outer one; a very faint tarsal gland, ending midway to heel; 

 a series of small skinfolds on knee and heel. Body moderately elongate, 

 in postaxillary region narrower than greatest width of head. When 

 hind leg is ad pressed, heel reaches to posterior border of tympanum; 

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

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

 upper parts smooth, except for a few pustules on the sides and above 

 the shoulders; venter smooth; a few flat granules behind the vent and 

 on lower femur; no glandular ridge behind eye; no skinfold across the 

 chest; a ventral disk; no external vocal sacs in the male. 



