290 BUFONIDA. 
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 Rio Grande). 
10. Bufo hematiticus. 
Bufo hematiticus, Cope, Proc. Ac. Philad. 1862, p. 157; Keferst. 
Gott. Nachr. 1867, p. 353, and Arch. f. Naturg. 1868, p. 295, 
pl O. £--7. 
Rhebo hematiticus, Cope, .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 @anthus 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 lmbs ; 
brown beneath, marbled with darker. 
Colombia ; Costa Rica. 
Se Costa Rica. 
b-c. Her. Costa Rica. O. Salvin, Esq. [C.]. 
11. Bufo guttatus. 
Bufo leschenaultii, Giinth. Cat. p. 64. 
Bufo guttatus, Schneid. Hist. Amph. i. p. 218; Wiegm. Isis, 1833, 
p- 657 ; Peters, Mon. Berl. Ac. 1863, p. 81. 
leschenaultii, Tschudi, Batr. p. 89; Dum. § Bibr. p. 666, pl. 91. 
Pale, 8 
Rhebo leschenaultii, Cope, Proc. Acad. Philad. 1862, p. 357 ; Espada, 
Viaj. Pacif., Vert. p. 167. 
, Crown without bony ridges; snout short, truncated; cauthus 
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 
