LS 
bS 
jel 
GYMNOPITHYS. 
B. Terrestres: tarsi plerumque elongati. 
c. Regio ocularis plus minusve nuda. 
c’. Nares semioperculate. 
GYMNOPITHYS. 
Gymnopithys, Bonaparte, Ann. Se. Nat. (iv.) i. p. 132; Scl. Cat. Birds Brit. Mus. xv. p- 296. 
Mr. Sclater places Pithys leucaspis and its allies with P. albifrons, the type of the 
genus Pithys ; but it belongs rather to Gymnopithys, of which G. rufigula is the type. 
P. albifrons is a very peculiar species with no near allies. It has oval open nostrils 
which are situated high up near the culmen; the orbital space is feathered and the 
formation of the crest is quite sud generis. G. fulvigula has a naked orbital space and 
operculated nostrils, in both of which characters it is followed by G. leucaspis and its 
allies. 
The range of Gymnopithys extends from Guiana over the Amazons Valley to 
Colombia, and thence northwards to Nicaragua; two closely allied species occurring 
within our limits. 
1. Gymnopithys bicolor. 
Pithys leucaspis, Lawr. Aun. Lye. N. Y. vii. p. 326 (nec Sel.) *. 
Pithys bicolor, Lawr. Ann. Lyc. N. Y. viii. p. 6°; Scl. & Salv. P.Z.S. 1864, p. 357°; Salv. 
P. Z.S. 1867, p. 145%; Sel. Cat. Birds Brit. Mus. xv. p. 296 (partim) *. 
Supra rufo-brunnea, fronte et capitis lateribus nigricanti-cinereis, tectricibus auricularibus nigris, regione 
postoculari nuda: subtus alba, cervicis lateribus, hypochondriis et tectricibus subcaudalibus brunneis ; 
subalaribus fuliginosis, remigibus interne umbrino marginatis: rostro nigricante, mandibula pallida, 
pedibus corylinis. Long. tota 5:0, ale 3:0, caudee 1:9, rostri a rictu 0-75, tarsi 1:05. (Descr. maris ex 
Panama. Mus. nostr.) 
© mari similis. 
Hab. Panama, Santa Fé (Arcé *), Lion Hill Station (/‘Leannan 12°), Paraiso Station 
(Hughes), Chepo (Arcé). 
This species was at first referred to G. leucaspis by Mr. Lawrence, who soon, 
however, appreciated its differences from that bird and described it under its present 
name?. From G. leucaspis it differs in being duller on the upper surface and in 
having the forehead and sides of the head cinereous instead of reddish ; moreover the 
male of G. bicolor has no concealed dorsal spot as in G. leucaspis. Both birds have a 
naked space behind the eye, which in the case of G. lewcaspis is said to be light blue, 
the legs being of the same colour and the iris red. Concerning G. bicolor we have no 
information on these points. 
The range of this species is strictly confined to the southern portion of the State of 
