308 btjfonid^: 



about half the width of the eye. First finger longer than second ; 

 toes half webbod; subarticular tubercles generally double; two 



Upper view of head. 



moderate metatarsal tubercles ; no tarsal fold. The hind limb being 

 carried forwards along the body, the tarso-metatarsal articulation 

 reaches the eye. Upper surfaces covered with small warts ; paro- 

 toids elliptic, moderate, close to the eye. Olive above, with irregular, 

 sometimes confluent, dark spots ; belly immaculate, or with slight 

 spots. Male with a subgular vocal sac. 

 Ecuador ; Mexico. 



a-d. S $ • Andes of Ecuador. Mr. Fraser [C.]. (Types.) 



44. Bufo dipternus. 

 Bufo dipternus, Cope, Amer. Nat. xiii. p. 437. 



Two faint straight supraorbital ridges, and a postorbital, but no 

 supratympanic ridge ; snout truncate ; tympanum rather indistinct, 

 two thirds the diameter of the eyo. Toes shortly webbed at the 

 base ; two shovel-shaped metatarsal tubercles. The hind limb 

 being carried forwards along the body, the tarso-metatarsal articula- 

 tion reaches the tympanum. Skin rough with small tubercles ; 

 parotoid a wide oval, in contact with the postorbital ridge. Above 

 ashen, with large brown, black-edged spots ; below immaculate ; 

 metatarsal spurs black. 



Montana. 



45. Bufo lentiginosus. 



Bufo lentiginosus, Gi'inth. Cat. p. 63. 

 Catesby, Nat. Hist. Carol, ii. pi. 69 ; Bart. Travels in Carol, p. 279. 

 ? Rana musica, Linn. S. N. i. p. 3-54. 

 Bufo lentiginosus, Shaw, Zool. iii. p. 173. 



musicus, Tschndi, Batr. p. 88 ; Harlan, Journ. Ac. Pldlad. v. 



p. 344. 



A supraorbital and a postorbital bony ridge, forming together a 

 right angle ; snout short, blunt ; interorbital space as broad as, or 

 a little narrower than, the upper eyelid ; tympanum very distinct, 

 generally nearly as large as the eye. First finger extending beyond 



