CYPHORHINUS. 75 
in the middle of the soft membrane which occupies the nasal fossa. The bill, too, is 
much compressed at the base, and has the culmen rather abruptly bent just above 
the nostril. These characters distinguish Cyphorhinus from all other Troglodytide. 
Six species are now known of this genus, whereof C. musicus is peculiar to Guiana, 
C. modulator to Bolivia and the Upper Amazon, C. thoracicus to Peru, C. phewocephalus 
to Ecuador and the Cauca, valley, C. dichrous to the Cauca valley, and C. lawrencti to 
Central America as far north as Costa Rica. South-eastern Brazil has no known 
species of the genus. 
1. Cyphorhinus lawrencii. 
Cyphorhinus cantans, Lawr. Ann. Lyc. N. Y. vii. p. 298* (nec Gm.). 
Cyphorhinus lawrencii, Scl. MS.; Lawr. Ann. Lyc. N. Y. viii. p. 5”, ix. p. 92°; Baird, Rev. Am. 
B. p. 113°; Scl. & Salv. P. Z. 8S. 1864, p. 345°; Ex. Orn. p. 41, t. 21°. 
Supra fuscus, alis et cauda extus nigro frequenter transfasciatis ; regione auriculari, mento, gutture et pectore 
toto castaneis; ventre medio cinereo, hypochondriis et crisso brunnescentibus; rostro corneo; pedibus 
fuscis. Long. tota 5-0, ale 2:5, caude 1:5, tarsi 0°95, rostri a rictu 0:9. (Descr. maris ex Panama. 
Mus. nostr.) 
Hab. Costa Rica, Angostura * and Valza (Carmiol); Panama, Lion Hill (*Leannan! 25), 
Chepo (Arcé ®). 
This is a species of restricted range, being confined to the Colombian State of 
Panama and to Costa Rica; but in the former district we have only seen specimens 
from the Panama Railway, and from Chepo forty miles south of it. Its nearest ally is 
C. phecocephalus, an Ecuadorean species which has also occurred at Remedios, in the 
State of Antioquia*. From this it differs in having the belly cinereous, instead of 
chestnut like the throat. C. musicus of Guiana has also a cinereous belly, but is again 
distinguishable by having distinct black and white streaks on the side of the neck, of 
which there are no traces in the present bird. 
Cyphorhinus lawrencii was one of M‘Leannan’s discoveries, specimens of it having 
been included in the first collection sent to Mr. Lawrence from the isthmus of Panama. 
These were at first supposed to belong to the C. musicus of Guiana, = C. cantans 
(Gm.)!—an error poiuted out by Mr. Sclater, to whom Mr. Lawrence submitted his 
specimens ?. 
We have no account of the habits of C. dawrencii; but from its resemblance to 
species owning the suggestive names C. musicus and C. modulator, it is doubtless a 
good songster. 
* Sclater and Salvin, P. Z.8. 1879, p. 492. 
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