292 BUFONID®. 
14. Bufo diptychus. 
Bufo poeppigii, Girard, U.S, Expl. Exped., Herp. p. 90. 
diptychus, Cope, Proc. Ac. Philad. 1862, p. 353, & 1863, p. 50. 
Crown without bony ridges; snout elevated, not protruding 
tympanum small, scarcely perceptible. Inner finger slightly longer 
than second; toes one-third webbed; a tarsal cutaneous fold con- 
tinuous with the inner metatarsal tubercle; outer tubercle sub- 
conical. Extended hind limb reaching the tip of the snout. Skin 
above smooth, with a few scattered tubercles ; parotoids divergent, 
trilateral, extending posterior to axilla, and continuous with a lateral 
dermal fold ; sides and lower surfaces rugulose. Above hght brown, 
with deep-brown spots ; a deep-brown chevron-shaped band between 
the orbits; a light vertebral line; belly brownish white, with a. 
median series of blackish variegations from sternum to abdomen. 
Paraguay. 
15. Bufo politus. 
Bufo politus, Cope, Proe. Ac. Philad. 1862, p. 158. 
Crown without bony ridges ; profile of snout gradually descending 
nearly to the lip; canthus rostralis none ; tympanum one fourth the 
size of the eye, narrowed above. Extremities stout; toes fully 
webbed ; soles smooth, without tubercles, except that formed by the 
first cuneiform bone, which is very prominent, oblique, conic ; a tarsal 
ridge, no fold. Skin of the whole body smooth, shining, without 
rugosities or spines; parotoids oval, moderate ; a series of flat 
glands on each side of the back, symmetrically arranged ; glands 
also on the superior surfaces of humerus, antebrachium, femur, and 
tibia; three of the last remarkably large. Above olive-brown, the 
glands bordered with deep brown: inner faces of the extremities 
straw-coloured, with large brown spots ; beneath bright yellow, with 
variously inosculating black bands ; palms and soles “slate-colour. 
Nicaragua, 
16. Bufo monksia. 
Bufo monksiew, Cope, Proc. Amer. Philos, Soc. xviii. p. 263. 
Crown without bony ridges; canthus rostralis sharp, lores per- 
pendicular, snout vertically descending to lip ; tympanum concealed. 
Fingers moderate, first and second equal ; toes hardly half webbed ; 
two prominent, blunt, metatarsal tubercles. The hind limb being 
carried forwards along the body, the tarso-metatarsal articulation 
reaches the posterior border of orbit. Skin rough, with small harsh 
tubercles ; parotoid rather large, a wide oval. Colour above blackish 
brown, with a few small ashen spots, and an ashen cross band 
extending across the eyelids and intervening frontal space ; lores and 
lips brown-spotted ; blackish spots on the sides, belly, throat, and 
limbs. 
Guanajuato, Mexico. 
