1899.] ON A NEW LIZAKD TEOM ECUADOR. 517 



of Cancronia cochlear ia, which seems to be a permanent resident 

 near the moudi of the Tiete River. It is certain that this bird 

 was obtained by Mr. Krone at Iguape. It is also certain that the 

 Red Ibis (Gaara rubra) sometimes occurs in the summer at Iguape 

 and also at Paranagua. It is possible that Cancroma, like Ouara, 

 is a coast-bird sometimes extending its migrations to the south of 

 Sao Paulo. It is evident that in this case Cancroma would be 

 more common at Rio than here. If this be not the case, then the 

 Iguape specimens of Cancroma may be derived from the Parana- 

 paneraa system, and have passed thus to the Ribeira Rivei'. The 

 exploration of the avifauna of the tropical parts of the Rivers 

 Paranapanema and Tiete is, therefore, one of the most pressing 

 conditions for the advancement of the study of the Sao Paulo 

 ornis. As the collection in the British Museum is said to include 

 Cancroma from Rio de Janeiro, the specimens from Iguape may 

 belong to the Coast ornis. 



I must not here enter into discussions for which I have not 

 such sufficient material as for the ornis of Sao Paulo ; but I may 

 at least say that the contrast in which the conclusions of Pelzeln 

 stand to facts, as here shown, has also made me very sceptical 

 concerning his other divisions and districts. 



In Rio Grande do Sul there exists a notable contrast between 

 the fauna of the coast-region and that of the Missiones of the 

 Uruguay. Chrysotls a^stiva is found there with species of Ara etc., 

 and also the monkey Mycetes niger. Tliis contrast exists also in 

 Sao Paulo ; and I am much disposed to consider these differences 

 as more important than those observed between the northern 

 and southern parts of the littoral zone. If this should be the case, 

 we have three great faunal subregions of Brazil — the Amazonian, 

 the Central, and the South-eastern. 



EXPLANATION OF PLATE XXVII. 



Map of South Araei-ioa, showing the South-eastern Brazilian Province and 

 its division into three Sub-provinces — Central (blue), Northern {yellow), and 

 Southern {red). 



3. Description of a new Lizard of the Genus Ameiva from 

 Ecuador. By G. A. Boulenger, F.R.S. 



[Received March 30, 1899.] 



(Plate XXYin.) 



Ameiva lbucostigma, n. sp. 



Nostril in the posterior part of the anterior nasal ; four supra- 

 oculars, the first of which may be broken up into scales, the three 

 others bordered on both sides with granules, or the second in 

 contact with the frontal ; six supraciliaries ; a single frontoparietal, 

 followed by an interparietal ; parietals broken np into small shields ; 



Prog. Zool. Soc— 1899, No. XXXIV. 34 



