FROGS OF COLOMBIA — COCHRAN AND GOIN 91 



Remarks. — Two large tadpoles from the Magdalena River drainage 

 in Bolivar have well-developed hind legs. The lower surface of the 

 femur has two large, light, irregularly oval white spots in a very wide 

 dark stripe. A third tadpole, from the upper Rio Cesar in Magdalena, 

 has two wide irregular light subfemoral stripes invaded by a few dark 

 spots and separated by a wide, light-spotted dark stripe. The receiv- 

 ing of the tadpoles from Bolivar (in 1961) and of the one from Mag- 

 dalena was sufficient cause to postulate the occurrence of a new sub- 

 species from northern Colombia, since the pattern of their lower 

 femoral surfaces differed from the other forms of Pseudis paradoxa 

 so well discussed by Gallardo (1961a). The examination of the single 

 adult from C6rdoba collected by Hno. Niceforo Maria established the 

 new form beyond a doubt, and it gives us great pleasure to name it 

 for its collector. 



Family Bufonidae 



Shoulder girdle arciferal, or epicoracoids partly fused. Sacral di- 

 apophyses dilated. Number of vertebrae tending to be reduced, 

 apparently resulting from a forward shift of the sacral articulation, 

 with the original sacral vertebrae perhaps becoming incorporated into 

 the urostyle. Omosternum usually absent. No maxillary teeth. Bidder's 

 organ present in male. 



Genus Bufo Laurenti 



1768. Bufo Laurenti, p. 25 (type species, B. vulgaris Laurenti). 



Generic diagnosis. — No maxillary or vomerine teeth. A parotoid 

 gland present. Shoulder girdle arciferous. Lateral sacral processes 

 dilated. 



Key to Colombian Species of Bufo 



a 1 . Bony head ridges present, more or less prominent. 



ft 1 . Upper eyelid with a hornlike projection; size to 35 mm . . B. ceratophrys 

 b 2 . No horn on upper eyelid. 



c 1 . Snout extended to a proboscis in adult. 



d 1 . Adpressed heel reaching angle of jaw or a little farther; toes three- 

 fourths webbed; parotoid triangular, not longer than eye; head- 

 crests including parietal strongly developed; size to 42 mm. 



B. rostratus rostratus 

 d 2 . Adpressed heel reaching axilla or front of shoulder; toes about one- 

 fourth webbed; parotoid oval, Y/i times diameter of eye; headcrests 



wide and swollen; size to 34 mm B. rostratus nicefori 



c 2 . Snout not proboscis-like, but often pointed and projecting in typhonitis. 



d 1 . A subnasal ridge; nostrils dorsal, projecting; tympanum touching 



downward extension of postorbital ridge. 



e 1 . Toes moderately long, one-half webbed . . B. granulosus humboldti 



e 2 . Toes rather short, one-fourth webbed . . . . B. granulosus beebei 



