414 



bulletin: museum of comparative zoology. 



tinuing to the groin; in the suprat5rmpanic region this fold somewhat swollen 

 resembling on one side a parotid gland; skin on the sides of the body loose and 

 folded; ventral disc marked off by a transverse fold between the fore limbs 



Fig. 4. — Telmatobius niger Barbour & Noble. 1. Foot. 2. Hand. 3. Open mouth. 



and by two longitudinal creases, one on either side of the belly; skin on the 

 thighs loose, but no posterior flap. 



Color above very dark chestnut-brown; ventral surface yellow, heavily 

 mottled and spotted with dark brown; the spots most abundant on the throat, 

 east so upon the thighs; tips of fingers and toes yellow. 



Dimensions. 



Tip of snout to vent 61 mm. 



Tip of snout to angle of jaw 21 " 



Greatest width of head 22 " 



Fore leg to tip of longest finger 37 " 



Hind leg to tip of longest toe 91 " 



Remarks. The only specimens known are the typical series some of 

 which have been distributed under the name of Telmatobius jelskii 

 to the U. S. N. M. and possibly elsewhere. Until topotj'pes of jelskii 

 were secured recently, we had these two species confused. 



Telmatobius ignavus, sp. nov. 



Diagnosis. A medium-sized smooth-skinned frog with strongly developed 

 supratympanic fold, the vomerine teeth well developed in two large prominent 

 groups and with the tympanum exposed. 



