GYMNOCICHLA. 223 



d'. Wares apertoB. 

 e'. PlunicB supranasales plus minusve criniformes. 



GYMNOCICHLA. 



Gymnocichla, Sclater, P. Z. S. 1858, p. 274 ; Cat. Birds Brit. Mus. xv. p. 371. 



The most obvious feature of this genus is the bare head of the male, on which the 

 feathers are reduced to hair-like bristles, the colour of the naked skin in life being 

 light blue. The bill is moderately strong, the nostrils open and. nearly .round. The 

 tarsi are rather strong, the aerotarsium distinctly divided by scutella, the planta being 

 smooth. The tail is moderate and rounded. 



Two closely allied species constitute this genus, one of which is found in the State 

 of Panama and the adjoining portion of the mainland of Northern Colombia. The 

 other occurs in Costa Eica and thence northwards to Honduras. 



1. Gymnocichla nudiceps. 



Myiothera nudiceps, Cassin, Pr. Ac. Phil. v. p. 106, t. 6 \ 



Pyriglena nudiceps, Scl. P. Z. S. 1854, p. 113 ^ 



Gymnocichla nudiceps, Scl. P.Z. S. 1858, p. 274'; Cat. Birds Brit. Mus. xv. p. 272*; Lawr. 



Ann. Lye. N. Y. vii. p. 294°; Scl. & Salv. P.Z.S. 1864, p. 356'; Salv. P.Z.S. 1870, 



p. 195 \ 

 Pithys rufigularis, Lawr. Ann. Lye. N. Y. vii. p. 293 (nee Bodd.) '. 

 Myrmecisa ferruginea, Lawr. Ann. Lye. N. Y. vii. p. 470'. 



Niger unicolor, pileo et capitis lateribus sparsim crinitis, quasi nudis, cute (ave vivo) cseruJea ; plaga dorsali 

 celata, tectricum alarum marginibus anguste atque remigis primi margine albis, rectricibus lateralibus 

 vis albo terminatis : rostro et pedibus nigris. Long, tota 6-5, alae 3-0, caudae 2-3, rbstri a rictu 0-95, 

 tarsi 1-2. 



2 supra ferrugineo-brunnea fere unicolor, cauda saturatiore, alis extus castaneis : subtus saturate cinnamomea, 

 gula vix pallidiore, remigibus interne pallide rufescenti-fusco marginatis. (Descr. . maris et feminae ex 

 Lion Hill, Panama. Mus. nostr.) 



Hah. Panama 2 (£ell^), Chiriqui, Bugaba '', Mina de Chorcha^, Chitra (Arce), Lion 

 Hill {M'Leannan ^ ^'^ ^). — Nokthebn Colombia 2. 



The bare head of the male of this species, the skin being blue in life, renders it 

 remarkable. The feathers of the head, however, are not wholly absent, but appear as 

 bristles thinly scattered over the otherwise bare surface. 



The first specimen of this species was obtained at Panama by Mr. J. G. Bell, and is 

 the one now in the collection of the Academy of Natural Science of Philadelphia, 

 which was described and figured by Cassin ^. Other examples were secured near 

 Santa Marta ^ in Northern Colombia, and both M'Leannan ^ and Arce ^ sent us many 

 specimens of both sexes from various parts of the State of Panama as far north as 

 Chiriqui and the Costa Kican frontier. Whether this species is found on the Pacific 

 side of the mauntains of that country, which seems probable, or not remains yet ta be 



