localities are stated to be affected by its close ally //. 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 //. megnpodius^ 

 possesses fourteen rectrices, — a salient point of distinction between them and the t^-pical 

 Pteroptodd^ in which the normal Passerine number of twelve is preserved. 



Om- 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. Htlactes taekii. 



Hylactes tarnii, King, P.Z.S. 1830-1, p. 15 ; Cab. et Heiu. Mus. Heiii. ii. p. 21 ; Megalonyx ruficeps, Lafr. ct 

 D'Orb. SjTi. Av. i. p. 16 ; D'Orb. Voy. Ois. p. t. 8, f. 1 : Leptonyx tarnii, D'Orb. Voy. p. 198 : Pteropiockus tarnii, 

 Darwin, Voy. Beagle, Zo.ol. iii. p. 70. 



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

 of Tres Montes (Darwin) ; Valdivia {B'Orhigny). 



2. Hylactes castai^eus (Plate XIX). 



Hal. Province of Colchagua, alt. 5000 ft. {Fhilippi S; Landbeclc). 



3. Htlactes megapodius. , 



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

 8cl. 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. 15-i ; 

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



Hah. Central and Isortlieru Chili {Darwin) : environs of Valparaiso {If Orligny) . 



August, 1867. 



[58] 



