448 PROCEEDINGS OF THE ACADEMY OF [April, 



D. olivacea anguina, thereby being able to elucidate some problems 

 of doubtful relationship. 



The most important papers dealing with the species of this genus 

 appear to be as follows: 



Lafresnaye, Revue et Mag. de Zoologie, 1851, pp. 465-468. 

 RiDGWAY, Proc. U. S. Nat. Mus., X, 1888, pp. 488-497. 

 ScLATER, Cat. Birds in Brit. Mus., XV. 1890, pp. 162-168. 



Although the present writer's work began with the collection of the 

 United States National [Museum, including that of the Biological Sur- 

 vey, he is under great obligations to the authorities of the American 

 Museum of Natural History, and of the Boston Society of Natural 

 History, as well as to Mr. (3utram Bangs, for the loan of material, with- 

 out which, particularly the valuable type specimens, it would have 

 been impossible to arrive at anything like satisfactory conclusions. To 

 Mr. Glover M. Allen he is also indebted for the verification of some 

 obscure references; and especially to Mr. Ridgway, whose constantly 

 courteous assistance has contributed to make this paper much better 

 than it otherwise would have been. 



Genus DENDROCINCLA Gray. 



Dryocopus Wied, Beitr. Naturg. Bras., Ill, 1831, p. 1111 {nee Boie) (type, 

 Dendrocolaptes turdiniis Lichtenstein). 



Dendrocincla Gray, List Gen. Birds, 1840, p. 18 (type, Dendrocolaptes 

 turdinus Lichtenstein). 



Dendromanes Sclater, Proc. Zool. Soc. London, 1859, p. 382 (type, Dendro- 

 cincla anabatina Sclater). 



Dendrocichla Sharpe, Hand-List Gen. and Spec. Birds, III, 1901. p. 74 (nom. 

 emend, pro Dendrocincla) (type, Dendrocolaptes turdinus Lichtenstein). 



Chars, gen. — Similar to Dendrocolaptes, but nares linear and some- 

 what operculate, instead of round and open; bill somewhat more 

 compressed. Species mostly smaller and of plainer colors. 



Type. — De7idrocolaptes turdinus Lichtenstein. 



Geographical Distribution. — Southern Mexico; Central America; 

 Tobago; Trinidad; and all of South America down to Bolivia and 

 southern Brazil. 



Key to the Species and Subspecies of Dendrocincla. 



A. — Wing over 115 mm. 



a. — Wing less than 135 mm. 



h. — Exposed surface of wing-quills decidedly tinged with 



olivaceous ridgwayi. 



h' . — Exposed surface of wing-quills clear chestnut. 



