10 TYRANMDiE. 



Hob. PAifAMA, CalovevoraS, Santa Fe 7 {Arci), San Pablo Station {0. S.), Lion 

 Hill 4 5 6 10 11 (M'Zeannan).—Sovm America from Colombia ^ to Guiana ^, Ama- 

 zons valley ^ and Brazil ^ ^. 



Spix described this species from specimens obtained near Rio Janeiro and in the 

 Amazons valley, and examples from these localities agree with one another and with 

 our series from the State of Panama. Mr. Lawrence separated the Panama bird under 

 the name of B. flavo-olivaceus ^, but a specimen, in our collection, compared with his 

 type appears to us to be inseparable from the true B. sulphurescens, though Mr. Sclater 

 places B. flavo-olivaceus as a synonym of B. cinereiceps ^. 



Bhynchocyclus marginatus ^^ is another name, apparently applicable to this species, 

 but the type has a slightly greyer head and darker back, the edgings of the wings are a 

 little more distinct, and it is also a trifle greyer on the throat. Mr. Sclater places this 

 name without question amongst the synonyms of B. sulphurescens ^- We do not think 

 the trifling difierences alluded to justify its separation. 



As will be seen above, B. sulphurescens has a very wide range over Tropical America, 

 being probably restricted to the hot low-lying districts. 



4. Rhynchocyclus cinereiceps. 



Cyclorhynchus cinereiceps, Scl. Ibis, 1859, p. 443' ; P. Z. S. 1859, p. 384'; Scl. & Salv. Ibis, 1860, 



p. 399 \ 

 Rhynchocyclus cinereiceps, Scl. & Salv. P. Z. S. 1864, p. 359*, 1870, p. 837'; Lawr. Ann. Lye. 



N, Y. ix. pp. 146", 201''; Bull. U. S. Nat. Mus. no. 4, p. 26'; Nutting, Pr. U. S. Nat. 



Mus. V. p. 395 ° ; Nutting & Ridgw. Pr. U. S. Nat. Mus. vi. pp. 374 ", 384 "; Scl. Cat. Birds 



Brit. Mus. xiv. p. 169 '\ 

 Rhynchocycltts sulphurescens, Lawr. Ann. Lye. N. Y. ix. p. 113". 



Precedent! similis, sed capite undique cinereo, gutture toto quoque cinereo, alanmi marginibus miaus distinctis 

 et abdomine paUidiore, distinguendus. Iride (ave viva) alba. 



Hah. Mexico, Oaxaca ^ and Playa Vicente ^ (Boucard), Teapa (ff. H. Smith), Tapana, 

 Sta Efigenia (Sumichrast ^), Merida in Yucatan (Schott ''), Peto in Yucatan, Izalam 

 {G. F. Gaumer); British HdNDUEAS, Orange Walk {G. F. Gaumer); Guatemala, 

 Chisec, Choctum, Cahabon {0. S. & F. B. G.), Volcan de Agua above San Diego, 

 Escuintla ^ {0. 8.) ; Honduras, San Pedro {G. M. Whitely ^) ; Nicaragua, San Juan 

 del Sur ^^ and Sucuya ^^ {Nutting) ; Costa Rica, La Palma {Nutting »), Angostura 

 {Carmiol ^ ^^) ; Paijama, Lion Hill {M'Leannan ^). 



On comparing a series of specimens recently sent us from Teapa, in the Mexican 

 State of Tabasco, by Mr. Herbert Smith, with our examples from Panama, we find no 

 differences, and considering how closely allied the species is to B. sulphurescens, its 

 characters are exceedingly constant. 



A good deal of confusion has arisen respecting the references to this species and 

 B. sulphurescens in Costa Rica and the State of Panama, but we believe we have here 



