IHBBi 





localities are stated to be affected by its close ally K tarnii, which represents it in the more 

 Southern Provinces of Concepcion and Valdivia. 



The present species, along with its allies of the same group, H. tarnii and H. megapodius, 

 possesses fourteen rectrices ,— a salient point of distinction between them and the typical 

 Pteroptochi, in which the normal Passerine number of twelve is preserved. 



Our figure of this species is taken from a specimen in Mr. Sclater's collection, obtained 

 from the describers direct. 



The genus Hylactes contains, as far as our present knowledge extends, only the three 

 following species, viz. : — 



1. Hylactes tarnii. 



Hylactes tarnii, King, P.Z.S. 1830-1, p. 15 ; Cab. et Hem. Mus. Hein. ii. p. 21 : Megalonyx ruficeps, Lafr. et 

 D'Orb. Syn. Ay. i. p. 16 ; D'Orb. Voy. Ois. p. t. 8, f. 1 : Leptonyx tarnii, D'Orb. Voy. p. 198 : Pteropioclus tarnii, 

 Darwin, Yoy. Beagle, Zool. iii. p. 70. 



Hub. Island of Chiloe and Port Otway, Gulf of Penas {King) ; Western Chili from Concepcion to the Peninsula 

 of Tres Montes {Darwin) ; Yaldivia (D'Orbigny). 



2. Hylactes castaneus (Plate XIX). 



Sab. Province of Colchagua, alt. 5000 ft. {Philippi Sf Landbech). 



3. Hylactes megapodius. 



Pteroptochus megapodius, Kittl. Mem. pres. Acad. Petersb. 1831, p. 182, t. 4 : Darwin, Voy. Beagle, Zool. iii. p. 71, 

 Scl. Cat. Am. B. p. 169 : Megalonyx rufus, Less. Cent. Zool. t. 66 ; Lafr. et D'Orb. Syn. Av. 1, p. 17 : Leptonyx 

 macropus, Sw. Zool. 111. 2nd Ser. t. 117 ; D'Orb. Voy. Ois. p. 197 : Hylactes megapodius, Gray, Gen. of B. 1, p. 154 ; 

 Cab. et Hein. Mus. Hein. ii. p. 21. 



Sab. Central and Northern Chili {Darwin) : environs of Valparaiso {D'Orbigny). 



August, 1867. 



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