Vol. XVIIl, pp. 211-214 October 17, 1905 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON. 



NEW GENERA OF TYRANNIDiP] AND TURDID^, AND 

 NEW FORM^ OF TANAGRID^ AND TURDID^E. 



BY ROBERT RIDGWAY. 

 By permission of the Secretary of the Smithsonian Institution. 



Platytriccus gen. nov. [Tyrannidse.) 



Similar to PlatyrlnclMs Desmarest * but tail relatively much shorter (but 

 little more than half as long as wing), wing relatively shorter and much 

 more rounded, the longest primaries exceeding distal secondaries by not 

 more (usually much less) than half the length of tarsus, and by less than 

 one-third the length of tail, the tenth (outermost) primary not longer than 

 third (usually shorter than first) ; tarsus nearly to quite one-third as long 

 as wing, much longer than middle toe with claw, nearly to quite twice as 

 long as exposed culmen ; feathers of chin without bristly points. 



Type, PlatyrltyncJms cancroma Sclater. 



(ttXoti/s, flat, wide, broad, and rplKKos, a small bird.) 



Species: Platytriccus cancroma (Sclater) ; Platytriccus albogularis (Sclater); 

 Platytriccus mystaceiis (Vieillot) ; Platytriccus insularis (Allen) ; Platytriccus 

 bifasciatus (Allen). Probably also the following, which, however, I have 

 not seen : Platyrhynchus senex Sclater and Salvin ; Platyrhynchus griseiceps 

 Salvin; Platyrhynchus flavlgularis Sclater, and Platyrhynchus saturatus Salvin 

 and Godman. 



*Platyrinchus Desmarest, Hist. Nat. Tangaras, Manalcins, et Todiers, 1805, livr. 4, text to 

 pi. 72. (Type Tndus p/aiyrAi/nc/iOS Gmelin). —Pta<yr/ij/;ic/to« (emendation) Vieillot, Analyse, 

 1816, Z9.—Plntyihynclius (emendation) Swainson, Zool. Illustr., ser. 4, i, 1820. pi. VS.—Platy- 

 rtiyncus Descourtilz, Orn. Brijs., 18.56. 



Monotypic, the only known species being Platyrincliua platyrhynchos (Gmelin). 

 40— Prog. Biol. Soc. Wash., Vol. XVIII, 1905. (211) 



