FROGS OF COLOMBIA — COCHRAN AND GOIN 47 



and below angle of jaw; no skinfold across the chest; a distinct ventral 

 disk; apparently no external vocal sacs in the male. 



Dimensions. — Head and body, 27.5 mm.; head length, 10 mm.; 

 head width, 10 mm.; femur, 13.5 mm.; tibia, 13 mm.; foot, 10.5 mm.; 

 hand, 8 mm. 



Color in alcohol. — Dorsum and lateral regions slate-gray, with a 

 large indistinct olive-gray spot behind each eye continuing aloDg the 

 back almost to sacrum, and forming with its fellow an indistinct 

 )( mark; lateral tubercles pale drab gray; tops of legs and arms with 

 a very wide slate-gray bar and one or two narrower and lighter 

 ones on a pale olive-gray ground; a pale gray axillary spot; upper 

 lip slate, with a narrow light edge and three or four small white 

 spots near the margin, the last one below and behind the eye; throat 

 and chest olive-buff; lower surfaces of arms and legs deep ochraceous- 

 buff; a fine gray network pattern on throat and chest, becoming 

 much coarser on belly; lower surfaces of legs and arms with indistinct 

 traces of a similar gray network; posterior femur dull ochraceous 

 buff, with narrowed prolongations of the dark crossbars and indis- 

 tinct gray reticulations. Webs between toes white. No light vertebral 

 or dorsolateral lines. The other adult at hand (BM 1929.2.1.3) has 

 only two small white spots on the upper lip. The large white axillary 

 spot is very distinct, however, and is continued in lessened brilliance 

 on top of the arm. The dark dorsal areas here appear as two coarse 

 chevron marks, their points nearly meeting. No light vertebral line 

 is visible in the two adults or in the two immature frogs (BM 1929. 

 2.1.4, 1929.2.1.6). 



Remarks. — According to the critical measurements, the width and 

 length of head as compared to length of body are greater in Phyllobates 

 chocoensis than in P. inguinalis or P. thorntoni. 



Boulenger was right in considering his "chocoensis" allied to bocagei 

 Espada, as the two appear very similar at first glance. The snout of 

 chocoensis seems wider, and this fact is borne out by the interorbital 

 diameter, which is 1% times the width of the upper eyelid in chocoensis 

 and is equal to it in bocagei. The minute white spots on the upper 

 lip of chocoensis seem to be absent in bocagei; otherwise the patterns 

 of both species are very similar. The first finger is a trifle shorter 

 than the second in chocoensis, while these two fingers are equal in 

 in bocagei; also the third toe is a little longer than the fifth in choco- 

 ensis, subequal in bocagei. The degree of webbing between the toes is 

 a full half in chocoensis, while it seems less in bocagei and the margin 

 of the web between the toes appears more deeply incised. The heel 

 reaches to the anterior eye in the four examples of chocoensis from 

 Santa Barbara, Antioquia, although it was said to reach the tip of 



