202 Mr. P. L. Sclater on the Neotropical 



Leptomjx albicollis, D'Orb. Voy. Ois. p. 196, pi. 8. f. 2. 

 Suprk fuscuSj uropygio et cauda extus rufcscentibus ; super- 

 ciliis et gula cum pectore et ventre medio albis, his nigro 

 transfasciatis : lateribus et ventre imo rufcscentibus nigro 

 transfasciatis : rostro et pedibus nigris : long, tota 7 '8, 

 alse 3'0, caudse 3" 3. 

 Hab. Chilia centralis {Darwin) . 

 Mm. P. L. S. 



The " Tapacolo" as this species is called, replaces its con- 

 gener in Central and Northern Chili. 



The pelvis and abnormal sternum of this bird are figured 

 in Eyton^s ' Osteologia/ pi. xiv. fig. 2 : there are also remarks 

 on its osteology and soft parts by the same author in Zool, 

 Voy. Beagle, iii. p. 151. 



Genus 6. Hylactes. 



Hylactes, King, P. Z. S. 1830, p. 15 : type H. tarnii. 



Megalonyx, Lesson, Cent. Zool. p. 200 (1830) : type M. 

 rufus { = H. megapodius) . 



Leptomjx, Sw. Zool. 111. ser. 2, pi. 117 (1831-32) : type H. 

 megapodius. 



In general appearance Hylactes is a strong form of Ptero- 

 ptochus, differing principally in its larger feet and elongated 

 hind claw, and in possessing fourteen rectrices. It is likewise 

 restricted to Chili. 



1. Hylactes tarnii. 



Hylactes tarnii, King, P.Z. S. 1830-31, p. 15 ; Cab. et Hein. 

 Mus. Hein. ii. p. 21 ; Scl. et Salv. Ex. Orn. p. 58 ; Ibis, 1869, 

 p. 283, et Nomencl. p. 76. 



Megalonyx ruficeps, Lafr. et D'Orb. Syn. Av. i. p. 16; 

 D'Orb. Voy. Ois. pi. 8. f. 1. 



Leptonyx tarnii, D^Orb. ibid. p. 198. 



Pteroptochus tarnii, Darw. Voy. Beagle, Zool. iii. p. 70; 

 Gray, Faun. Chil. i. p. 304; Phil, et Landb. Cat. Av. Chil. 

 p. 14. 



Obscure schistaceus : pileo summo, dorso postico et ventre cas- 

 taneis, uropygii laterum et ventris imi plumis nigro trans- 

 fasciatis : rostro et pedibus nigris : long, tota 9*3, alse 

 40, caudae 3*5. Fem. mari similis. 



