HEKPETOLOGY OF JAPAN. 129 



iieath nearl}^ smooth becoming coarsely gramilar posteriorly on the 

 sides, lower belly and posterior half of femurs. Color (in alcohol) 

 above dark reddish gray, with numerous irregular, light-edged dusky 

 blotches; a dark chevron across the head at the center of the upper 

 eyelids, the angle pointing backwards, and a straight dark line across 

 the head at the anterior corner of the eyes ; a narrow dark line over 

 canthus rostralis and upper part of tympanum; several broad dark 

 vertical marks on the upper lip and crossing to the lower, one near 

 the tip of the snout, one below the nostrils, two below the eye; some 

 irregular black marks on white ground in the grom; upper poste- 

 rior aspect of femur marbled black and white in strong contrast ; legs 

 cross-barred; underside whitish, throat and chest densely sprinkled 

 with dark gray. 



Dimensions. 



mm. 



Total length of snout to vent 51 



Width of head 18 



Fore leg 22 



Hind leg, vent to tip of longest toe 68 



Tibia 22 



The adult male (U.S.N.M. No. 23902; Kumamoto, province of 

 Higo, Kiusiu) is smaller (38 mm.), but does not seem to differ mate- 

 rially m proportions; the fii'st finger is provided with copulatory 

 asperities which cover two separate, slightly swollen pads, one basally 

 on the side and below, the other distally and on the upper side of the 

 metacarpal, no asperities on the phalanges; the excision of the web 

 is not quite so deep as in the female; a pau" of external vocal sacs on 

 the side of the throat, the openings being behind the tongue near the 

 corner of the mouth. A broad gray band across the tliroat involving 

 the vocal sacs. A very narrow white line on the upper side along the 

 whole median line is also shown in this specunen, but this character 

 is not sexual. 



Variation. — No remarkable variation is found among the Japanese 

 specimens as regards structural characters or proportions. There is 

 some difference in the amount of roughness of the skm on the upper 

 surface, but this is probably due to some extent, at least, to the 

 different state of preservation; one young specimen (No. 30744) from 

 Miyazaki, Kiusiu, is so rough, however, even to the inclusion of the 

 upper eyelids, that it might easily be mistaken for R. rugosa were it 

 not for the convex snout, the narrow interorbital space, deeply 

 excised webs, etc. In color there is greater divergence, though in the 

 specimens from Japan proper this is- chiefly confined to the presence 

 of a narrow median white line on the back in a few specimens; none 

 of them have the wide pale median line found in some Formosan 

 specimens. This narrow white line is present in all the Ishigaki 



26485— No. 58—07 9 



