1893.] <^d7 [Cope. 



tine ridges. Tliey are also as far as their own diameter within the antero- 

 posterior line of the internal nares. The ostia pharyngea are narrow slits 

 about as long as the nares. The tympanic drum is destroyed, but the 

 space for It is a vertical oval, with about half the anteroposterior diameter 

 of the orbit. The heel of the extended hind limb reaches the anterior 

 border of the orbit. The extremital dilatations are very small. There is 

 a rather large oval internal or prehallucal tubercle which is entirely ses- 

 sile ; there is a small external tubercle. There are two palmar tubercles, 

 and those of the anterior digits are distinct but flat ; those of the posterior 

 digits are less distinct. The integuments of the inferior and concealed 

 surfaces are smooth ; on that of the back a few small tubercles are pres- 

 ent. 



The color of the upper surfaces is gray dusted with blackish. The in- 

 ferior or posterior surface of the hind legs is black, and this color is con- 

 tinuous with dark-gray cross bands which cross the superior faces of the 

 tibia and femur, four over each. The spaces between these cross-bands 

 are scarlet. The posterior part of the sides and anterior part of the abdo- 

 men is blackish to brownish, with crimson and orange spots of various 

 sizes and shapes, the largest in the groin. Three cross-bands on upper side 

 of foot, and three across forearm. Coloration of head unknown. 



Measurements. 



MM. 



Total length of head and body 35 



Length of head to posterior line of tympanum 12.5 



Width of head at posterior line of tympanum 15 



Interorbital width 3.5 



Length of fore limb 20 



Length of fore foot 9 



Length of hind limb from groin 51 



Length of hind foot 24 



Length of tarsus 9 



The only specimen of this handsome species contained in the collection 

 is from Boruca, and is No. 327. 



LiTHODYTES RHODOPis Cope, Proceeds. Acad. Phila., 1866, p. 323 ; Pro- 

 ceeds. Amer. Philos. Soc, 1869, p. 160. Bylodes sallcei Giinther, Pro- 

 ceeds. Zo'ol. Soc, Loudon, 1868, 487, PI. 38, Fig. 3. Lit/wdytes podici- 

 ferus Cope, Journal Acad. Phila., 1875, p. 107, PL 23, Fig. 9. L. habe- 

 natus Cope, I. c, p. 109. L. muricinus Cope, I. c, p. 108, PI. 23, Fig. 

 13. 



After full comparison of the material at my disposal, I strongly suspect 

 that all the forms described above as distinct species are simply 

 varieties of a single variable one. In some young iiidividuals the vomerine 

 series of teeth appear more transverse, as in the individual called muri- 

 cinus. In such small individuals, the pigment is apt to be brilliant. In 



PROC. AMER. PHILOS. SOC. XXXI. 142. 2 Q. PRINTED DEC. 23, 1893. 



