FROGS OF COLOMBIA — COCHRAN AND GOIN 23 



Color in alcohol. — Dorsum seal brown; upper limb surfaces sepia; 

 venter sepia, with large light ecru drab spots on chin, chest, and belly, 

 these spots extending on the sides where they darken to merge with 

 the dorsal color; a large pale ecru drab spot on underside of upper 

 arm from axilla nearly to elbow, and some smaller and less distinct 

 light spots on anterior proximal femur and in groin; side of head drab, 

 with a pale stripe along upper lip border from tip of snout extending to 

 shoulder; palms of hands and soles of feet drab, their disks and 

 tubercules a little lighter. 



Remarks. — This minute frog seems to be confined to Antioquia. 

 The head appears to be both longer and wider in relation to total 

 length than in any other Colombian species of Dendrobates, although 

 hahneli and minutus ventrimaculatus approach its lowest proportions. 

 The heel reaches to the anterior corner of the eye in opisthomelas, but 

 not beyond its posterior corner in minutus ventrimaculatus. 



Specimens Examined 

 COLOMBIA 



Antioquia: Llano Grande, Rfo Negro, CNHM 63874-5, USNM 147224; 

 Medellin, AMNH 1372-4, 5194-6, USNM 147506-7; probably Medellm, 

 AMNH 1364; Santa Ines, north of Medellfn, 3,800 ft., USNM 145794 

 [formerly BM 1947.2.15.30] (cotype). 



Dendrobates minutus ventrimaculatus Shreve 



Plate 3d-p 



1935. Dendrobates minutus ventrimaculatus Shreve, p. 213 (type locality, Sarayacu» 

 Ecuador); 1947b, p. 316.— Marx, 1958, p. 431. 



Description. — USNM 146843, an adult female from Aserrio, near 

 Rio Pescado, Caqueta; Colombia. Tongue a third as wide as mouth 

 opening, oval, its posterior border free and unnotched; snout nearly 

 truncate when viewed from above, truncate and sloping backwards 

 in profile, the upper jaw extending well beyond the lower. Nostrils 

 lateral, slightly projecting, their distance from end of snout about 

 a fifth their distance from eye. Canthus rostralis rounded but dis- 

 tinct; loreal region flat, vertical, continuous with upper lip. Eye large, 

 prominent, its diameter equal to its distance from tip of snout; 

 interorbital diameter 1% times that of upper eyelid, a little less than 

 interval between nostrils. Tympanum distinct, its greatest diameter 

 half that of eye, scarcely separated from eye. Fingers moderate, 

 with lateral ridges, free, first finger much shorter than second, fourth 

 longer than second and reaching to base of penultimate phalanx of 

 third, the disk of which covers about three-fourths the tympanum; 

 a small oval thumb pad present; a small round palmar callus; meta- 

 carpal tubercles well developed. Toes moderate, third toe slightly 



