THRYOTHORUS. 



121 



The characters of these two divisions will be found detailed in 

 the introductory remarks, and under their respective heads. Trofjlo- 

 dytes, with its iwo sections, is very closely related to Thryothurus, 

 as restricted, so much so that it is very difficult to draw the line. 

 The supposed differences referred to by many authors resulted from 

 tlie comparison of Troylodyles with Thryophilus, rather than with 

 true Thryothoras. 



In the following synopsis I present an artificial key to the species 

 of Thryothorus, Fheugopedius, and Thryophilus, found in Nortli 

 and Middle America, with tlieir nearest South American allies, and 

 based entirely on color and markings. T. pleui'odicfus I know only 

 by description, and may not have worked it in properly. A more 

 natural arrangement, based upon the i)eculiarities of structure, fol- 

 lows the first. 



St/nopsis of Species. 



A. Head above and back of much the same color. 



a. Crissum barred transversely ; rest of under parts 



spotted or banded conspicuously with black (ex- 

 cept infelix). 



1. Outside of wings banded ; head like the 



back. 



a. Throat wliite ; rest of under parts black, 



finely banded with white 

 B. Under parts pure white ; sides from 

 neck to cris.sum banded with black 



2. Outside of wings plain ; head more rufous 



than the back. Sides of head and neck 

 white, conspicuously streaked with black ; 

 wings longer than tail, except infelix. 

 a. Beneath white, spotted with black from 



chin to belly. Flanks rusty 

 S. Chin and upper throat black, spotted 

 with white ; rest of under parts plain 

 rufous ...... 



y. Beneath whitish, unspotted ; on sides 

 brown. Upper tail covert barred. Tail 

 longer than the wings .... 



b. Crissum barred transversely ; rest of under parts 



plain. 



1. Upper tail coverts and exposed surface of 

 wings barred. 



a. Tail feathers reddish-brown, barred 

 with black. Greater wing coverts spot- 

 ted with whitish. 



1. Beneath rusty white . . . ludovicia^us. 



2. Beneath rusty brown . . . berlandieri. 



fasciato-ventris. 

 pleurostictus. 



maculipectus. 



rutilu 



felix. 



