, MTEMECIZA. 229 



southern M. swainsoni does not penetrate beyond Panama, whilst M. Icemosticta and 

 M. stictojatera are peculiar to Costa Eica, or its southern frontier. 



M. swainsoni has a somewhat slender bill, the nostrils oval and open, the nasal 

 feathers short, but fully developed, not reaching so far as the nostrils. The naked 

 space round the eye is small, and chiefly behind the orbit. The tail is rather long and 

 rounded ; the tarsi are slender, the acrotarsium scutellate, the planta entire. M. Immo- 

 sticta has a rather stouter bill, the nasal feathers extend to the posterior margin of the 

 nostrils ; the tail is shorter and less rounded. 



1. Myrmeciza swainsoni. 



Myrmothera longipes, Vieill. N. Diet. d'Hist. Nat. xii. p. 113 (??) \ 



DrymopMla longipes, Sw. Zool. 111. (2) i. t. 23 ". 



Myrmeciza longipes, Scl. P. Z. S. 1858, p. 249 (partim) '; Cat. Birds Brit. Mus, xv. p. 278; 



Lawr. Ann. Lye. N. Y. vii. p. 325*; Sel. & Salv. P. Z. S. 1864, p. 357'. 

 Myrmeciza swainsoni, Berl. Ibis, 1888, p. 130 °. 

 Myrmeciza boucardi, Sel. Cat. Birds Brit. Mus. xv. p. 279 (partim, nee Berlepsch) \ 



Supra rufo-castanea, plaga dorsali parva celata alba, pileo et cervioe postica cinereis plumis medianis medialiter 

 rufo-brunneis ; capitis lateribus infra oculos, gutture et pectore nigris ; abdomine medio albo utrinque 

 cinereo ; hypochondriis et tectricibus subalaribus fulvescentibus, subalaribus griseo-albis, remigibus interne 

 cervino marginatis : rostro nigro, pedibus carneis. Long, tota 6'0, alse 2'7, candse rectr. med. 2'1, rectr. 

 lat. 1"6, rostri a rictu 0-9, tarsi ]'2. 



9 supra mari similis, subtus, praeter abdomen medium album, fulva, gula albicantiore. (Descr. maris et feminse 

 ex Veraguas, Panama. Mus. nostr.) 



Hob. Panama, Veraguas {ArcS ''), Lion Hill Station [M^Leannan * ^). — Venezuela ; 

 Trinidad ; Guiana '^. 



The bird of this form, obtained by the hunters of Bogota, was separated by Count 

 Berlepsch as M. boucardi, the chief difference consisting in the whole of the top of the 

 head and back of the neck being dark cinereous instead of the middle feathers having 

 rufous-brown centres. But the typical bird also comes from Colombia, as Mr. T. H. 

 Wheeler has recently sent us skins from Villavicencio in the llanos of the R. Meta 

 which agree with the Guiana form. 



Mr. Sclater places the Panama birds with M. boucardi ^ ; but this is an error, as 

 they differ in no way from the form found in the countries lying along the north 

 coast of South America, which is the bird usually called M. longipes (Vieill.), a name 

 misapplied according to Count Berlepsch, who substituted M. swainsoni for it ^. 



M. swainsoni and its close ally M. boucardi form a distinct section of the genus, 

 distinguished by the uniform chestnut-red of the back, wings, and tail. 



The range of this species in the State of Panama is very limited, and does not appear 

 to extend much beyond the Line of Kailway. No specimens have reached us from the 

 Chiriqui district. 



