214 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



dried skins); length (skin), 135; wing, 72; tail, 58; exposed culmen, 13; 

 depth of bill at nostrils, 6; tarsus, 21; middle toe, 14. <^ 

 Island of Jamaica, Greater Antilles. 



Laletes osburni Solateb, Proo. Zool. Soc. Lond., 1861, 72, pi. 14, fig. 2 (Jamaica; 



type in coll. U. S. Nat. Mua. ) ; Cat. Am. Birds, 1862, 359.— Albkecht, Journ. 



fiir Orn. , 1862, 195.— Gadow, Cat. BirdsBrit. Mus. , viii, 1883, 313.— Coey, Auk, 



iii, 1886,- 190 (synonymy and diagnosis); Birds W. I., 1889, 77 (do.); Cat. 



W. I. Birds, 1892, 17, 116, 130. 

 [Laletes'] osburni Sclatek and Salvin, Nom. Av. Neotr., 1873, 12.— Cory, List 



Birds W. I., 1885, 10. / 

 Llaletesl osburni JSTewton (A. and E.), Handb. Jamaica, 1881, 106. 

 Laletes osbumii Baird, Eeview Am. Birds, 1866, 383 (Trelawney, Jamaica). 

 [Cyclarhis'] osbiirnii Gray , Hand-list, i, 1869, 384, no. 5818. 



Genus PACHYSYLVIA Bonaparte.* 



Hylophilus (not HylophUa Hiibner, 1816) Temminck, PI. Col., iii, livr. 29, 1823, 

 text to pi. 173, fig. 1. (Type, IL thoracicus Temminck. ) 



Pachy Sylvia Bonaparte, Consp. Av., i, 1850, 309. (Type, Sylvicola decurtaia 

 Bonaparte. ) 



Small Vireonidse (wing not more than 65 mm.), with rather slender- 

 conoid, slightly uncinate bill, inner toe (without claw) as long as or 

 longer than hallux (without claw), its claw reaching decidedly beyond 

 base of middle claw; coloration plain and dull. 



Bill shorter than head (though sometimes nearly as long), slender- 

 conoid, more tapering terminally than in other Vireonidae; exposed 

 culmen about two-thirds as long as tarsus, nearly straight to near tip, 

 where gradually and slightly decurved, the tip of maxilla distinctly 

 produced but not strongly uncinate; gonys shorter than distance from 

 nostril to tip of maxilla (sometimes nearly as long), very slightly 

 convex; depth of bill at frontal antise about equal to its width at same 

 point or slightly less. Nostril exposed, longitudinally ovate, in lower 

 anterior portion of nasal fossae, sometimes narrowly margined ante- 

 riorly by membrane, posteriorly in contact, or nearly so, with bristly 

 feathers of frontal antiae. Rictal bristles indistinct or with only one 

 or two well developed, but either the frontal feathers or those of the 

 malar or mental antiae (sometimes all) with distinct terminal bristles. 

 Wing moderate, much rounded; tenth primary about half as long as 

 ninth, broad, with rounded tip; ninth primary not longer than second- 

 aries, sometimes decidedly shorter; seventh, sixth, and fifth, or eighth 

 to fifth longest, the eighth usually longer than fourth, sometimes 

 longer than fifth. Tail decidedly, usually much, shorter than wing, 

 the difference varying from more than length of tarsus {P. decurtata) 

 to less than half as much (P. viridiflava). slightly rounded, the rec- 

 trices rather pointed at tips. Tarsus less than one-third to slightly 



«One specimen. 



*The fact tliat Hylophilus is preoccupied and can not, therefore, be used for this 

 genus has been brought to my attention by Mr. Harry 0. Oberholser. 



