136 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxv. 



New York Cit}-, and which until now has remained unique. The pres- 

 ent example has been carefully compared with the type, and there is 

 no doubt of their identity; though the former is somewhat more ochra- 

 ceouson the central portion of the abdomen, as well as darker, slightly 

 more greenish olive throughout, this difference, of course, to be 

 expected, for the type was for a long time mounted, and through 

 exposure to light has become somewhat faded. Our specimen meas- 

 ures: wing, 70 mm.; tail, G5 mm.; exposed culmen, 11 nun.: tar- 

 sus, 13.5 mm.; middle toe, 8 nun. ''Iris brown." 



SIRYSTES SIBILATOR (Vieillot). 



Muscicdjvi ffihilntor Vieillot, Nouv. Diet. d'Hist. Nat., XXI, 181S, p. 457. 

 Siri/sfes sibilator CABASifi and Heine, Muh. Hein., II, 1859, p. 75. 



One female. "Iris brown." The edgings of the wing-coverts in 

 this example are entirel}'^ ochraceous, apparently a lingering mark of 

 immaturity. The longer lower tail -coverts are pale ochraceous, and 

 the black upper tail-coverts are narrowly margined with chestnut. 



RHYNCHOCYCLUS SULPHURESCENS (Spix). 



Pl(it>/r]iiiw'h>tss>(lpliiire>!criis Spix, Av. Spec. Nov. Bras., II, 1S25, p. ]0, pi. xir, fig. 1. 

 Rht/nchocydus sulp}iure>fcen.'< C\B.\yi^ and Heine, Mus. Hein., II, 1859, p. 56. 



One adult female, Julv 21, 1!»00. "Iris light brown." 

 This species is quite certainly divisible into several geographical 

 races, but sufficient material is not at present accessible to render 

 advisable any such attempt. Birds from Matto Grosso, Brazil, are 

 identical with the one here chronicled from Paraguay, and those from 

 Trinidad are not appreciably ditferent. 



SUIRIRI SUIRIRI (Vieillot). 



Muscicapa suiriri Vieillot Nouv. Diet. d'Hist. Nat., XXI, ISIS, p. 487. 

 Suiriri suiriri o^ ORBiGfiY , Voyage Amer. Merid., Ois., 1835-44, p. :>36. 



One adult female. "Iris brown." This is a typical specimen, as 

 Vieillot's name was based on the "Suiriri ordinario" of Azara. The 

 bird described hy Gould as Pac/n/ramjjhus alhescens,^ from Buenos 

 Ayres, good specimens of which are in the United States National 

 Museum, represents a recognizable subspecies which should be known 

 as Suiriri .Huiriri albescens. It differs from the true st/iriri in being 

 rather more grayish on the upper surface, but principally in having 

 the wing-bars and outer margins of the secondaries almost pure white 

 instead of dull olive gray. 



The proper generic name for this group is Suiriri d'Orl)igny.^ as it 

 seems to be entirely pertinent, and of very nmch earlier date than 

 Empidagra Cabanis and Heine. ^ 



1 Zool. Voyage Beagle, III, 1841, p. 50, pi. xiv. 



2 Voyage Amer. Merid., Ois., 18:55-44, p. 3:36. 

 »Mus. Hein., II, 1859, j). 59. 



