132 G. A. BOULENGER 



belly white; throat spotted with brown. Maie with small internal 

 vocal sacs, and a large compressed oval tubercle, covered with 

 a black horny sheath, on the inner side of the inner finger. 



From snout to vent 105 millim. 



Several specimens from Barraca and Missiones Mosetenes. 



This fine new frog is nearest related to L. ocellatus, from 

 which it differs in the presence of only two glandular folds on 

 the back, the lesser development of the fore limbs in the males, 

 and the presence, in the latter, of a single tubercle on the inner 

 finger. 



8. Leplodaclylus ocellatus, L. (2, 4). 



9. Leplodaclylus caliginosus, Gir. (2, 4, 5). 



10. Bufo marinus, L. (1, % 3, 5, 7). 



11. Bufo crucifer, Wied. (7). 



12. Bufo lyphonius, L. (3, 5, 7). 



13. Bufo granulosus, Spix. (2, 4, 7). 



14. Hyla maxima, Laur. (7). 



15. Hyla appendicular, Laur. (5, 7). 



16. Hyla cryplomelas, Cope (2). 



17. Hyla balzani, sp. n. — Tongue circular, entire, scarcely 

 fine behind. Vomerine teeth in two oblique series on a level 

 with the hinder edge of the large choanae, forming a chevron 

 pointing forwards. Head as long as broad; snout rounded, as 

 long as the diameter of the orbit; canthus rostralis feebly marked: 

 loreal region concave ; interorbital space a little broader than 

 the upper eyelid; tympanum distinct, two thirds the diameter 

 of the eye. Outer fingers one third webbed ; toes almost entirely 

 webbed; disks smaller than the tympanum; a very strong ru- 

 diment of pollex. The tibio-tarsal articulation reaches the tip of 

 the snout. Skin smooth above, coarsely granular below (including 

 the throat). Pale grey-brown above, finely spekled with blackish; 

 upper lip white, some white spots on the Hanks. Male with an 

 internal vocal sac. 



From snout to vent 33 millim. 



A single male specimen from the Prov. Yungas, at 1600 

 metres altitude. 



