292 BUF0NIDJ5. 



14. Bufo diptychus. 



Bufo poeppigii, Oirard, U.S. Expl. Expect, 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 light 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, Proc. 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 monksiae. 



Bufo monksias, 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. 

 Eingers moderate, first and second eqiral ; 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. 



