92 U.S. NATIONAL MUSEUM BULLETIN 2 88 



d 2 . No subnasal ridge; nostrils lateral or superolateral; tympanum not 

 usually touching postorbital ridge. 

 e l . Angles of jaw projecting in adult; headcrests often greatly developed 

 in old adults and involving the parotoids anteriorly; soles of feet 



spinose; size to 70 mm B. typhonius 



e 2 . Angles of jaw not projecting; head ridges heavy but not unusually 

 developed. 

 /'. Parotoids large; a tarsal fold present. 



g l . Skin granular to spinose; size to 157 mm . . . . B. marinus 

 g 2 . Skin glandular, nearly smooth; size to 212 mm . B. blombergi 

 f 2 . Parotoids moderate; no tarsal fold. 



g l . Supraorbital and postorbital ridges forming a right angle; 



size to 90 mm B. coniferus 



g 2 . Supraorbital and postorbital ridges forming a wide curve; size 



to 43 mm B. sternosignatus 



a 2 . No bony ridges on top of head. 



b 1 . First finger as long as or longer than second. 



c 1 . Tarsal fold lacking or indistinct; toes one-half webbed, or a little more; 

 tarsometatarsal joint reaching a point between eye and nostril; size 



to 145 mm B. glaberrimus 



c 2 . Tarsal fold distinct; toes one-fourth to one-third webbed; tarsometatar- 

 sal joint reaching beyond snout; size to 90 mm . . B. haematiticus 

 b 2 . First finger shorter than second; toes one-half webbed; size to 23.5 mm. 



B. hypomelas 



Bufo ceratophrys Boulenger 



Plate 14a-c 



1882. Bufo ceratophrys Boulenger, 1882a, p. 319, pi. 22, fig. 2 (type locality, 

 Ecuador).— Gadow, 1901, p. 179.— Nieden, 1923, p. 141— Rivero, 

 1961, p. 22.— Gallardo, 1962, p. 96.— Gorham, 1963, p. 15. 



Description. — MLS 50, a half-grown individual from Aserrio, 

 Caqueta, Colombia. Bony ridges on top of head limited to rounded 

 crests at inner borders of upper eyelids. Parotoids small. Tongue 

 one-third as wide as mouth opening, slender, oval, its posterior border 

 free and unnotched; snout 3-lobed when viewed from above (a central 

 lobe, and one above each nostril), truncate and slanting backwards 

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

 lateral, very small but projecting, their distance from end of snout 

 one-fourth their distance from eye. Can thus rostralis sharp, angulate; 

 loreal region flat, vertical, merging into the nearly vertical 

 upper lip. Eye large, prominent, its diameter equal to its distance 

 from tip of snout; interorbital diameter about three-fourths that of 

 upper eyelid (including the greatly prolonged "horn" on outer edge 

 of eyelid) and equal to interval between nostrils. Tympanum very 

 small, not very distinct, its greatest diameter apparently about 

 one-third that of eye, separated from eye by an interval equal to 

 nearly its own diameter. Fingers without disks, moderate, with 

 lateral ridges, free, first finger a trifle longer than second and equal 



