290 BTTFONID-E. 



tympanum small. Toes slightly webbed at the base : no tarsal 

 fold. Parotoids elongate. Brownish yellow or bluish slate above, 

 dark-spotted ; beneath immaculate. 



United States (Chihuahua, Sonora, Lower Bio Grande). 



10. Bufo hsematiticus. 



Bufo haematiticus, Cope, Proc. Ac. Philad. 1802, p. 1-57 ; Keferst. 



Gott.Nachr.im7, p. 353, and Arch. f. Naturg. 1868, p." 295, 



pi. 9. f. 7. 

 Kha3bo hsematiticus, Cope, I. c. p. 357. 



Crown without bony ridges ; snout short, obliquely truncated, 

 with angular canthus rostralis ; loreal region vertical ; interorbital 

 space broader than the upper eyelid ; tympanum very distinct, 

 about half the width of the eye. Fingers slender, with slightly 

 swollen tips, first extending beyond second ; toes short, webbed at 

 the base, with slightly swollen tips ; subarticular tubercles simple, 

 not very prominent ; two slightly developed metatarsal tubercles ; 

 a thin tarsal fold. Limbs slender. The hind limb being carried 

 forwards along the body, the tarso-metatarsal articulation reaches 

 beyond the tip of the snout. Skin perfectly smooth everywhere, or 

 with very small tubercles on the upper surfaces ; parotoids large, 

 elliptic, angular externally. Brown above ; a light line from the 

 tip of the snout along the canthus rostralis, the edge of the eyelid, 

 the parotoid, and the side of the body to the groin ; sides of head 

 and body below this line reddish brown ; a light spot below and in 

 front of the eye ; a few large, symmetrical, light-edged spots on the 

 back ; a few transverse, black, light-edged spots on the limbs ; 

 brown beneath, marbled with darker. 



Colombia ; Costa Rica. 



a. 5 • Costa Rica. 



b-c. Hgr. Costa Rica. O. Salvin, Esq. [0.]. 



11. Bufo guttatus. 



Bufo leschenaultii, Giinth. Cat. p. 64. 

 Bufo guttatus, Schneid. Hist. Amph. i. p. 218 ; Wiegm. Isis, 1833, 



p. 657 ; Peters, Mori. Perl. Ac. 1863, p. 81. 

 leschenaultii, Tschudi, Batr. p. 89; Dum. <$,- Bibr. p. 666, pi. 91. 



f. 1. 

 Rhffibo leschenaultii, Cope, Proc. Acad. Philad. 1862, p. 357 ; Espada, 



Viaj. Pacif., Vert. p. 167. 



Crown without bony ridges ; snout short, truncated ; canthus 

 rostralis angular ; loreal region vertical ; interorbital space much 

 broader than the upper eyelid ; tympanum very distinct, vertically 

 elliptic, about two thirds the width of the eye. Tips of fingers and 

 toes swollen ; first finger extending far beyond second ; toes slightly 

 webbed at the base, with simple subarticular tubercles ; two mode- 

 rate metatarsal tubercles ; a rather indistinct tarsal fold. The 



