LEPTOTRICCUS.— POGONOTRICCUS. 19 
nigricanti-cinereis ; superciliis castaneis ; linea frontali et regione parotica albis: subtus margaritaceo-albus ; 
pectore precipue ad latera cinereo perfuso; ventre et crisso flavicantibus ; subalaribus albis: rostro nigro ; 
pedibus obscure corylinis. Long. tota 4:0, alee 1:95, caud 2-0, rostri a rictu 0°55, tarsi 0°65. (Deser. 
feminee ex Calovevora, Panama. Mus. nostr.) 
Hab. Panama, Calovevora?, Chitra !? (Arcé). 
Of this pretty species we have as yet only seen the two original specimens sent us by 
Arcé in 1868, and described in the ‘ Proceedings’ of the Zoological Society for that 
year. Both these specimens are marked as females, so that the male is not yet known, 
but it, in all probability, is quite similar to the female in its plumage. 
In its long slender tarsi and delicate feet this species resembles Leptotriccus sylviola 
of Brazil, and it also has the pointed wings and long tail of that bird; the bill, however, 
is somewhat larger and wider. 
The distinct chestnut superciliary streak over each eye is a strongly marked charac- 
teristic feature of L. superciliaris. 
POGONOTRICCUS. 
Pogonotriccus, Cabanis & Heine, Mus. Hein. ii. p. 54 (1859) (type Muscicapa eximia, Temm.) ; 
Scl. Cat. Birds Brit. Mus. xiv. p. 97. 
Mr. Sclater recognizes four species as belonging to this genus, its range extending 
from Costa Rica to South Brazil. 
The general colour of all the species is bright olive above and yellowish beneath, 
the head varying from grey to dark plumbeous. The bill in P. eaimius narrows 
rather abruptly, the width at the rictus being considerably more than half the length 
of the tomia; the culmen is gradually curved from the forehead, more rapidly towards 
the tip; the rictal bristles are very fully developed; the tarsi are rather short and 
slender, the enclosing scutelle almost obliterated into one shield; the feet are feeble, 
the outer and middle toes being nearly equal, the inner one shorter. The wing is 
rounded, the 3rd quill a little < 2nd and 4th, 5th = 2nd, lst = 9th; tail rather long 
and square, the feathers narrow, a little < wing, > 3 times tarsus. 
1. Pogonotriccus zeledoni. 
Pogonotriccus ? zeledoni, Lawr. Aun. Lyc. N. Y. ix. p. 144°, 
Supra olivaceus ; capite summo et nucha plumbeis ; alis caudaque fusco-nigris, extus pallide olivaceo limbatis ; 
capitis lateribus et gula cinereo-albis ; loris albis: abdomine toto olivaceo-flavo, medialiter cum subalaribus 
flavido-albidis : rostro et pedibus obscure corylinis, mandibula pallida. Long. tota 4-2, ale 2-4, caude 2:0, 
tarsi 0°65. (Descr. femine exempl. typ. ex Barranca, Costa Rica. Mus. G. N. Lawrence.) 
Hab. Costa Rica, Dota Mountains, Barranca (Carmiol +). 
We have never obtained a specimen of this species, but have taken our description 
from the type of the female lent us by Mr. Lawrence. This bird has a close ally in 
P. plumbeiceps, Lawr., of Colombia, but the bill is rather wider, the mandible paler, 
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