426 bulletin: museum of comparative zoology. 



Hylidae. 



Gastrotukc'a monticola, sp. no\'. 



Diagnosis. Closely related to G. ttiarsupiatum from which it may be dis- 

 tinguished by the following characters: — Vomerine teeth in two straight con- 

 fluent series on a level with the hinder edge of the choanae. Snout a little 

 longer than the diameter of the eye. Loreal region slightly concave. Inter- 

 orbital space once and a third the diameter of the eye, strongly concave. Toes 

 two thirds webbed. The hind leg being carried fonvartl along the body the 

 tibiotarsal articulation reaches between the eye and the nostril. Skin .smooth 

 or finely granular above, generally granular on the head and sides. Size large, 

 the pouched female at least sixty-one millimeters from snout to vent, generally 

 sixtv-ei'^ht millimeters, coloration somewhat different from G. marsupiatum; 

 female with irregular dark blotches on the back, never forming two sym- 

 metrical stripes as in that species. 



Range. Only known from the low central Andean range of northern 

 Peru from Hiiancabamba south to Querocotilla. 



Type. M. C. Z. 5,290 from Huancabamba, northwestern Peru; 15 

 August, 1916, G. K. Noble. 



Description of Type (adult female with empty pouch). Size large; head 

 about as broad as the body, much broader than long; snout blunt forming 

 a semicircle with distinct cnnthus rostralis and concave loreal region; orbital 

 diameter equals the distance of the eye from the nostril, which is very near the 

 end of the snout; interorbital .space about twice as broad as an upper eyelid. 

 Tongue large oval, slightly emarginate behind. Vomerine teeth in two 

 ovoid groups, touching each other and forming a straight line between the 

 posterior halves of the choanae. Tympanum three fifths the size of the orbit. 

 Fingers with a very slight rudiment of a web; the first finger equal in length 

 to the second; toes two thirds webbed, e. g. two inner toes webbed to base 

 of penultimate phalanx, third to middle of penultimate, fourth about one 

 third the length of the antepenultimate and fifth almost to the end of the 

 penultimate; discs distinct, about one third of their width broader than the 

 penultimate phalanx, distinctly narrower than the width of the tympanum; 

 subarticular tubercles well developed; a large inner metatar.sal tubercle and a 

 distinct fold along the inner side of the tarsus. Tibiotarsal articulation 

 reaches the nostril, or not quite so far. Skin finely granular on the back, 

 coarsely granular on the sides and very coarsely granular on the ventral 

 surface; a slight indication of a dorsolateral fold. 



Color in alcohol generally bluish grey above; a dark greyish spot between 

 the eyes; a broader one in the scapular, and a narrower one in the iliac region. 

 (In We the ground-tone was brilliant green, and the pattern was dark brown), 



