26 U.S. NATIONAL MUSEUM BULLETIN 288 



of eye, and tibio tarsal articulation reaches to tip of snout; when hind 

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

 legs are bent at right angles to body, knees touch. Skin of upper 

 parts faintly granular, except top of head, which is smooth; venter 

 smooth (pustular under the lens) ; a pronounced swelling behind eye 

 and a wide glandular ridge from posterior corner of eye descending 

 behind tympanum and ending above shoulder; no skinfold across 

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

 the male. 



Dimensions. — Head and body, 17.5 mm.; head length, 5.5 mm.; 

 head width, 6 mm.; femur, 7 mm.; tibia, 7.5 mm.; foot, 6 mm.; hand, 

 4.5 mm. 



Color in alcohol. — Dorsum clove brown, with a small lighter sepia 

 spot on knee, heel, and elbow; venter seal brown, with a wide drab 

 band across throat and a small drab spot near tip of chin; sides of 

 head clove brown, lightening to sepia near edge of upper jaw; poste- 

 rior femur clove brown, unspotted; soles of feet and palms of hands 

 sepia, their disks and tubercles a little lighter. 



Remarks. — While the La Ceja frogs are darker and show less pattern 

 than typical D. minutus from Barro Colorado Island, Panama, they 

 agree with the topotypes of minutus in all other essentials. When 

 more examples from both localities have been collected and studied, 

 the actual range in color pattern may be found to be quite similar. 

 Of four tadpoles (USNM 144984) that were collected with the La 

 Ceja frogs, the smallest has a head and body length of 6 millimeters 

 and a tail length of 13 millimeters and the largest has respective 

 measurements of 9 and 16 millimeters. The appearance of minute 

 hind legs on the latter tadpole shows the beginning of metamorphosis. 



The faint traces of webs between the outer toes in this subspecies 

 is unusual in the genus Dendrobates, in which most forms have the 

 toes, as well as the fingers, completely free. 



Specimens Examined 

 COLOMBIA 



Antioquia: La Ceja, Monte del Diablo, USNM 144980-4. 

 PANAMA: Barro Colorado Island, MCZ 15288 (holotype), ANSP 23126, 23200; 

 Gatun, ANSP 21441-4. 



Dendrobates tinctorius wittei Laurent 



Plate 5a-c 



1923. Dendrobates tinctorius (not of Schneider). — Barbour, 1923a, p. 13. — Breder, 



1927a, p. 72, photograph. 

 1942. Dendrobates tinctorius wittei Laurent, p. 12, fig. 17 (type locality, Los 



Mangos, [Magdalena?] Colombia). 



Description. — USNM 124223, an adult from one kilometer west of 



