418 MESSRS. SCLATER AND SALVIN | June 10, 
Nigerrima : campterio toto et tectricum alarium marginibus, nec- 
non remigis primi limbo angusto, albis: rostro et pedibus 
nigricanti-plumbeis, illo versus apicem albicante: long. tota 
6:0, ale 3°2, caude 2°8, tarsi 1:3, rostri a rictu 1:0. 
Hab. in Costa Rica et in rep. Honduratensi. 
Obs. Similis G. nudicipiti, sed campterio toto albo et rostro validiore 
insignis, et plaga dorsi ad basin plumarum alba valde minore. 
Upon comparing Arcé’s specimens of Gymnocichla collected at 
Tucurriqui with Panama skins of G. nudiceps, we find that they 
belong to different species, of which we have pointed out the 
characters above. We have therefore selected the name chiroleuca 
for the present bird, as expressing one of its most noticeable 
characters, the pure whiteness of the bend of the wing. 
We have also, through Mr. Moore’s kindness, had an opportunity 
of reexamining the bird collected by Leyland at Omoa, in Honduras, 
and named by him G. nudiceps, in his list of Leyland’s collection 
(Proc. Zool. Soc. 1859, p. 55), and find it also belongs to the 
present species. Mr. Moore notes that the bareness of the head in 
his specimen is only partial; and this is likewise the case in the 
Costa-Rican example. The denudation only extends, over the top 
of the head, rather further than a line joining the eyes, but embraces 
the whole space immediately round the eyes. In the adult G. nu- 
diceps (as is shown in Cassin’s figure, Pr. Acad. Se. Phil. v. p. 106, 
t. 6) the whole summit of the head is bare. 
4. GRALLARIA PRINCEPS, Sp. Nov. 
Grallaria guatemalensis, Salvin, P. Z.S. 1867, p. 146. 
Supra oleaginea, plumis niyro marginatis ; pileo et collo postico 
valde obscurioribus et cineraceo tinctis ; loris et oculorum am- 
bitu rufescentibus : alis obscure fuscis, extus et intus castaneo 
limbatis : cauda omnino fuscescenti-castanea: subtus saturate 
ferruginea, pectore paulo obscuriore, gutturis medii plumis nigro 
variegatis: rostro obscure corneo, mandibule basi albicante ; 
pedibus corylinis : long. tota 6°5, ale 4-3, caude 1°7, tarsi 1-9, 
rostri a rictu 1:3. 
Hab. in Veragua (drcé). 
Obs. Similis G. guatemalensi, sed rostro robustiore, altiore, colore 
corporis superi obscuriore, ventris autem rubiginoso saturatiore 
distinguenda. 
The receipt of a second and more adult specimen of this Grallaria 
from Veragua has enabled us to distinguish it from its northern 
ally, to which Salvin had previously referred it with some hesitation. 
It is still more different from G. regulus of Western Ecuador, which 
is smaller and much less deeply ferruginous below. 
The present species makes the sixth of the group allied to G. rea, 
which are thus distributed :— 
1. G. imperator, ex Brasilia. 
2. G. rex, ex Guiana. 
3. G. regulus, ex Aiquator. occidentali. 
