CTPHOEHINUS. 75 



in the middle of the soft membrane which occupies the nasal fossa. The bUl, too, is 

 much compressed at the base, and has the culmen rather abruptly bent just above 

 the nostril. These characters distinguish CyphorMnus from all other Troglodytidse. 



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. phceocephalus 

 to Ecuador and the Cauca valley, C. dichrous to the Cauca valley, and C. lawrencii to 

 Central America as far north as Costa Rica. South-eastern Brazil has no known 

 species of the genus, 



1. Cyphorhinus lawrencii. 



CyphorMnus cantans, Lawr. Ann. Lye. N . Y. vii. p. 293 ' (nee Gm.) . 



CyphorMnus lawrencii, Scl. MS.; Lawr. Ann. Lye. N. Y. viii. p. 5 ^, ix. p. 92 'j Baird, Rev. Am. 

 B. p. 113 ^ Sel. & Salv. P. Z. S. 1864, p. 345 '; Ex. Orn. p. 41, t. 21 \ 



Supra fuscuB, alls efc cauda extus nigro frequenter transf aseiatis ; regione aurioulari, mento, gutture et pectore 

 toto castaneis ; ventre medio cinereo, hypochondriis et crisso brunnescentibus ; rostro corneo ; pedibus 

 fuscis. Long, tota 5*0, alse 2-5, caudse 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 (M'Leannan^ ^ ^), 

 Chei^o, (Arce^). 



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. phcecocephalus, an Ecuadorean species which has also occurred at Remedios, in the 

 State of Antioquia *. Prom this it diflFers 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 traees in the present bird. 



CyphorMnus lawrencii was one of M'Leannan's discoveries, specimens of it having 

 been included in the first collection sent to Mr. Lawrerite from the isthmus of Panama. 



r , 



These were at first supposed to belong to the C musicus of Guiana, = C. cantans 

 (Gm.) 1 — a^n error pointed out by Mr. Sclater, to whom Mr. Lawrence submitted his 

 specimens ^. 



We have no account of the habits of C. lawrSicii ; 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, S. 1879, p. 492. 



10* 



