Mr. 0/ Salvin on the Genus Geothlypis. 147 



The distinguishing characters for the two species would there- 

 fore stand, after my experience : — 



Ch. asiaticus. Ch. damarensis. 



Larger ; wings and tarsus always longer. 



Legs and toes yellowish. 



Axillaries like the under wing-coverts, 



earth-brown. 

 Eemiges without white. 



Smaller. 



Legs and toes blackish. 

 Axillaries white. 



Outer web of the 7-1 1 reraiges with 

 a white basal patch. 



XVIII. — Remarks on the Mniotiltine Genus Geothlypis. 

 By OsBERT Salvin, M.A., F.L.S., F.Z.S., &c. 



Some months ago our collector in Veragua, Enrique Arce, sent 

 us a single specimen of a Geothlypis, from the slopes of the 

 Volcano of Chiriqui, which has perplexed me not a little. In 

 endeavouring to. form a just view as to its proper position, my 

 observations have ranged over nearly every recognized member 

 of the genus, specimens of all but one of which are before me, 

 furnished by Mr. Godman's and my own collection and by that 

 of Mr. Sclater*. 



The latest published account of this genus is contained in 

 Prof. Baird's ' Review of American Birds,^ p. 219 et seqq. From 

 this work it might be gathered that, so far as Geothlypis cequi- 

 noctialis was concerned, and its closely allied races, the whole ot 

 tropical America was occupied by one or other of them, and that 

 it was hardly probable that other races of the same form yet re- 

 mained to be discovered. The receipt of the specimen above 

 referred to shows us that our information was still incomplete. 



One or other of the races of G. eequinoctialis is included in 

 each of the large faunas of South America. Thus in Brazil we 

 find G. velataf ; in Guiana, Trinidad and Venezuela, and the 

 U. S. of Columbia we have G. (Bquinoctialis ; and in Central 



* The only species I have not seen is Geothlypis rostratis, Bryant, from 

 Nassau, Bahama Is. (Proc. Boston Soc. N. H. xi. p. 67 (1866). Its nearest 

 ally is said to be G. trichas ; but as I have had no opportunity of examin- 

 ing specimens, I omit further mention of it in the present paper. It 

 would appear to be resident in Nassau. 



t The synonymy of all the species here mentioned is so fully investi- 

 gated in Prof. Baird's work already quoted that it would be superfluous 

 to re traverse this part of the subject. 



