222 Proceedings of the Biological Society of Washington. 



The tips of the toes are evidently swollen into disks in caeruleopunctata 

 and in young vibicaria. 



I fail to see any difference between adults of the two species in degree of 

 separation of the outer metatarsals and should say that they were separated 

 nearly to the base in both. 



I should then put vibicaria in group II of Boulenger (which includes all 

 the other tropical American Ranae) and regard it as both anatomically and 

 geographically allied to R. caeruleopunctata. 



(e) The tadpole of this species has not been described. 



The specimen at hand has the hind legs already apparent and measures 

 70 mm. The taU is about twice as long as the body, rounded at the tip; 

 interocular space equals width of mouth; black; tail light brown with circu- 

 lar black dots; teeth 6-4; the upper series marginal; the lower bordered by 

 a row of papillae; the uppermost row uninterrupted and the three lowest 

 uninterrupted. 



This tadpole agrees with that of Rana palmipes rather than with any 

 other described American tadpole, but has more numerous series of horny 

 teeth above. The tadpole of caeruleopunctata is as yet unknown. 



(/) Deckert (Zoologica II, No. 1, 1915) mentions Rana godmani from 

 Costa Rica. The locality (Guapiles, 1000 ft.) is far too low for this frog 

 and the color "greenish olive above with indistinct darker spots, and whit- 

 ish below" does not agree with that of vibicaria and sounds suspiciously 

 like that of palmipes. 



Rana palmipes. 



Boulenger (1920, p. 479) in his discussion of Cope's Ranula chrysoprasina 

 says that no specimens of R. palmipes have ever been received from Costa 

 Rica. This is due, of course, to the fact that Underwood's collections 

 mostly came from the high central part of the country. That palmipes 

 occurs in Costa Rica is shown by six specimens in the M. C. Z., collected by 

 me at Zent, at Monteverde and at Guapiles. 



Rana pustulosa. 



A single female specimen from Ventanas, Durango, was all that was 

 known of this frog when Boulenger wrote in 1920. In 1921, I was pre- 

 sented with a male specimen from Mazatlan, Sinaloa by Senor Doctor 

 Carlos Cuesta Torron. It is now in the M. C. Z. 



It differs from the male of palmipes in having external vocal sacs; the 

 tympanum is nearly the size of the eye and separated from it by % its own 

 diameter; the tibiotarsal articulation reaches the eye; the heels do not over- 

 lap; there is a large horny pad on the inner side of the first finger. 



