108 ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



the wrist of the appressed fore limb, and marks a point a little beyond the middle 

 of the tibia. Digital dilatations very small. All the specimens from the level of 

 from 5000 to 7000 feet. 



The colors of this species vary remarkably, more than I have observed to be 

 the case in any other frog. All of the varieties agree in having a large triangular 

 brown patch below the vent, a dark line along the can thus rostralis, and dark 

 crossbars on the legs. They differ as follows : — 



Var. A. Dark-brown above and below ; speckled on the lower surfaces with 

 dirty- white; side of head deep-brown to membranum tympani. Sometimes a 

 white vertebral line, and a transverse one like it on the posterior face of the femur. 

 Numerous specimens, all from 7000 feet on the Pico Blanco. 



Var. B. Similar to the last, but with a bright rufous spot extending from 

 the eye forwards to the lip border; a white spot from the tympanic disc downwards 

 and backwards. Two specimens. 



Var. C. Cherry-red everywhere except on the abdomen ; a brown spot below 

 the eye, one behind the tympanum, and several on the back. Sole of tarsus and 

 foot black. One specimen. 



Var. D. Dirty-white, with four longitudinal brown bands above. An oblique 

 brown band from orbit to abdomen, ceasing at the middle of the side. A broad 

 blackish band with pale centre from groin upwards parallel to and well removed 

 from the other oblique band. Lower surfaces white. One specimen. 



The small digital dilatations and obtuse muzzle are characters which distinguish 

 this frog from the L. conspicillatus as at present defined. 



25. Lithodytes muricinus, Cope, spec. nov. 



Canthus rostralis straight angular, muzzle narrowly truncate. Tympanic disc 

 equal eye. Vomerine teeth in two short transverse fasciculi behind the internal 

 nares, well separated from each other, and not extending outwards beyond the line 

 of the inner border of the inner nares. Tongue elongate, flat, and extensively free 

 behind. Digital dilatations small ; the heel of the extended hind limb marks the 

 end of the muzzle. 



Sides of head and body and upper surfaces of limbs black, unspotted ; below 



light-brown unspotted ; above uniform red purple. 



M. 



Length head and body 0200 



" to angle of jaws 0075 



" of fore limb 0110 



" of hind foot 0150 



