BIRDS COLLECTED IN PARA G UA Y—OBERHOLSER. 141 



iiiiirgiiis. and many pale buffy feathers on the under surface, where they 

 contrast plainly with the incoming feathers of the pale gray perfect 

 plumage. 



Mr. Kidgway has directed our attention to the structural dili'crences 

 obtaining between the so-called '"''Dacnis^^ •'<j)ecfo.mnnd DacnLs cayana — 

 ditt'erences that obviousW necessitate generic separation, the nameyl?'^- 

 h'(>(h((')us Cassin^ being applicable to the former. The other species 

 of this group are: 



Afrleodacnis leucogeni/s (Lafresnaye) (type of genus). 



Afelcodacnis analis (d'Orbigny and Lafresnaye). 



Ateleodacnis phtmbea (Latham). 



(?) Ateleodacnis sahnonl (Sclater). 



Family MNIOTILTID.E. 



BASILEUTERUS AURICAPILLUS (Swainson). 



iSetojjhaga iniricapUla Swainson, Anim. in Menag., 1837, j). 2i)o. 

 Basileuterux auricapiUug Srarve, Cat. Birds Brit. Mus., X, 1885, p. 393. 



One specimen. "Iris brown." The birds from northern South 

 America are rather darker and decidedly more brownish above than 

 those from Brazil and Paraguay, and are worthy of subspecific 

 recognition. 



This species is usually called Bas<7euterus'Dermivorus, but this name^ 

 refers primarily to Si/Ivia vennivora Latham,^ which is Ilelmlthems 

 vi'rmh'oi'Hs (Gmelin); and the designation above given is therefore the 

 proper one. 



BASILEUTERUS LEUCOBLEPHARUS CALUS Oberholser. 



Basilevtcrns lucohlepJutrvs calus Oberholser, Proc. Biol. 8oc. Washington, XIV, 

 1901, p. 188. 



Chars, stdhsjj. — Similar to BasilcKterus leacohlepIiaraK: leucohlepharux, 

 but slate color of head and neck darker, less brownish; olive green of 

 back and rump less yellowish; breast much more heavily shaded with 

 slate gray; sides and tianks almost pure slate gray, instead of olive 

 green mixed with pale brownish gray; crissum yellowish white instead 

 of olive yellow; bill darker brown. 



Description. — Type, adult male. No. 173448, U.S.N.M. ; Sapucay, 

 Paraguay, July 1, 1900; William T. Foster. Pileura and nape slate 

 color; a sharply defined line extending backw^ard from the base of 

 bill on each side of the crown, slate black; rest of upper surface plain 

 olive green; tail similar, with rather lighter edgings; remiges fuscous, 



iProc. Acad. Nat. Sci. Phila., 1864, p. 270. 



''Sylvia vermivora Vieillot, Nouv. Diet. d'Hist. Nat., XI, 1817, p. 278. 



3 Index Orn., II, 1790, p. 544. 



