HEEPETOLOGY OF JAPAN. 97 



Korea, August, 1890, is almost without spots on the back and has an 

 obHque black line behind the tympanum suggesting the ear spot of 

 R. japonica. Such a specimen is superficially much like the latter 

 species, but the much shorter tarsus and femur, the much larger inner 

 metatarsal tubercle, and the longitudinal dermal ridges on the back 

 between the dorso-lateral ridges at once indicate B. nigr-omaculata. 



Description. — Adult male; U.S.N.M. No. 23579; Yokohama; Sep- 

 tember, 1896; L. Stejneger, collector. Vomerine teeth in two 

 slightly oblique groups between the choanae, their posterior end 

 extending somewhat behind the latter; nostrils somewhat nearer 

 the eye than the tip of the snout; distance between nostrils equals 

 their distance from orbits; interorbital space narrow, scarcely more 

 than half the width of upper eyelid; tympanum slightly longer 

 than high, its longest diameter four-fifths that of the eye, ^and more 

 than twice its distance from the latter; first finger considerably 

 longer than second, its basal phalanx and the metacarpal on the inner 

 side provided with a large swollen pad very minutely granulated; 

 tips of digits tapering, obtusely pointed, the terminal phalanx being 

 set off from the rest of the digit by a fold across the joint which is 

 markedly more distinct than on the other joints; toes about three- 

 fourths webbed, the deepest incision of the webs on both sides of 

 fourth toe scarcely reacliing the end of its basal phalanx; subarticular 

 tubercles small but distinct; inner metatarsal tubercle large, project- 

 ing, sharp, its length nearly four-fifths the length of the first toe from 

 the anterior end of the tubercle a distinct outer metatarsal tubercle; 

 no tarsal fold; hind limb being carried forward along the side of the 

 body the tibio-tarsal joint reaches the anterior border of the eye ; heels 

 do not meet when hind limbs are bent at right angles to axis of body; 

 a strongly marked dorso-lateral fold from posterior border of eye to 

 insertion of hind limb ; between these folds about four series of some- 

 what irregular but sharply marked longitudinal dorsal folds, the 

 longest about as long as upper eyelid; skin above indistinctly 

 shagreened, more coarsely granular on the sides and on the posterior 

 aspect of the femur, transversely rugose on the belly, nearly smooth 

 on chest and throat ; a large external vocal sac on each side below the 

 angle of the mouth. Color (in alcohol) above brownish olive with 

 longitudinal blackish spots, one surrounding each dorsal glandular 

 fold; dorso-lateral folds paler brownish; a narrow pale bluish line 

 from the snout down the median line of the back ; sides with irregular 

 blackish spots which encroach upon the lower edge of the dorso- 

 lateral fold; upper surface of limbs with dusky spots which form 

 crossbars on femur; upper lip with a few small dusky spots; under- 

 side uniform whitish. 



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