Vol. XX-| 

 1903 J 



Clark, Black-zvingcd Palm Ta>iager . 



599 



while Sclater states that in Guiana (Demerara and the Mt. Ror- 

 aima region), Surinam (Dutch Guiana), and on the island of 

 Mexicana (Lower Amazons) , intermediate grades occur, the 

 olive-green edgings to the wing feathers in these specimens being 

 only slightly manifest. In the absence of material from these 

 localities, I cannot make any remarks on this point, but I merely 

 wish to call attention to the fact that, while Sclater regards melan- 

 optera as a good subspecies of Taiiagra pahnarum, Ridgway is 

 inclined to consider them as entitled to full specific rank. 



In the accompanying table are given the averages for all the 

 male specimens from the various points. 



From the figures it will be seen at once that, as regards the wing, 

 the largest specimens are from Peru, while the smallest are from 

 Panama ; starting at Panama, the average rises west into Costa 

 Rica, and east, through Santa Marta, Yacura, and Margarita 

 Island, to Trinidad. The lower Amazons specimens are the same 

 size as those from Costa Rica, and are smaller than those from 

 Guiana and Trinidad. 



Measurements of Tanagra palniariim mclaiiopiera ScL. 



Ta?iagi'a palmartim palinnruin Max. 



Brazil 



99 



72-2 1.37 14-5 



The tail measurements, however, do not vary in the same way. 

 Although the birds with the shortest tails are from Panama, those 



