BIRDS COLLECTED IN PA RAG UA Y— OBERHOLSER. 135 



apparently separable as a geographical race. Five males from Bahia, 

 Brazil, average in measurement of wing, 72 mm., of tail, 56 mm.; 

 while the present Paraguay example has a wing of 78 mm., and a tail 

 of 62 mm. The earliest name availaljle for the Brazilian race is 

 ciivlerU Swainson:^ and the proper comljination is PacJiyrhaiuphus 

 r!rld!s cHvieri!. 



Family PIPRTDyF. 



SCOTOTHORUS UNICOLOR (Bonaparte). 



Heteropelma iniiciihn- Bonaparte, Consp. Av. Volucr. Anisod., 1S54, p. 4. 

 <SV'o?o</ioras unicoZor Oberholser, Proc. Acad. Nat. Sci. Phila., 1899, p. 209. 

 Heteropelma virescens Auct. 



One example, apparently typical. " Iris brown." 



CHIROXIPHIA CAUDATA (Shaw). 



Pipraraiidata Shaw, Nat. Miscell., V, 1794, pi. cliii. 



Chiro.viphia caudafa Cabanis, Wiegmann's Archiv f. Naturg., 1847, I, p. 235. 



Three specimens. "Iris brown." One of these is an immature 

 male, and differs from the adult female as follows: Whole crown scar- 

 let; throat, sides of head and neck mixed with blackish; under surface 

 tinged with l)luish. 



Family TYRANNID.F. 



MYIARCHUS FEROX (Gmelin). 



Mnscicapa fero.r (rsiKiA's, Syst. Nat., I, 17SS, p. 9154. 



Mi/iarch'us fero.r Cabanis, Wiegmann's Archiv f. Naturg. (Ornith. Notiz. ), I, 

 1847, p. 248. 



One specimen, closely resembling })irds from Guiana, differing only 

 in the more rufescent tinge to the upper tail-coverts, and in the darker, 

 more reddish edgings to the wing-coverts. "Iris brown." 



Judging from specimens in the United States National Museum 

 collection, Myiarchiis ferox is entirely distinct from My larch us prl- 

 zelnl Berlepsch."^ The latter is lighter ashy on the breast, much 

 paler, more grayish above, and has a decidedly paler bill. 



BLACICUS PILEATUS (Ridgway). 



ContopM.5pi7eoh<.s KiDciWAY, Proc. U. S. Nat. Mas., VIII, 1885, p. 21. 

 Blacicus pileatus Oberholser, Auk, XVI, 1899, p. 3:57. 



A single adult male of this ver^^ distinct species is of particular 

 interest, since it reveals for the ffrst time the region in which the bird 

 may be found. The species was original!}^ described from a single 

 specimen without indicated localit}^ which Mr. Ridgway discovered 

 among the collections of the American Museum of Natural History in 



^Psaris cuvierii, Zool. Illnst., I, 1820-21, pi. xxxii. 

 2 Ibis, 1883, p. 139. 



