201 
Species of the Family Pteroptochidsew 
Genus 5. Pteroptochus. 
Pteroptochos, Kittl. Mem. pres Acad. Sc. St.-Pet. 1831, 
p. 178 : type P. rubecula. 
The genus embraces two species confined to Chili, where, 
however, they are both abundant and well known. The wings 
in these birds are exceedingly short, and hardly ever used in 
flight. The divisions of the tarsal scutes are well marked. 
The hind claw is short and curved. The rectrices are twelve 
in number : the tail is much rounded. 
1. Pteroptochus rubecula. 
Pteroptochus rubecula , Kittl. Mem. pres. Acad. Petersb. 
1831, p. 179, pi. 2; Bp. Consp. p. 205; Cab. et Hein. Mus. 
Hein. ii. p. 20; Gray, Faun. Chil. i. p. 304; Ph. et Landb. 
Cat. Av. Chil. p. 15 ; Scl. Cat. A. B. p. 169; P. Z. S. 1867, 
p. 325; Scl. et Salv. Nomencl. p. 76. 
Megalonyx rubecula , Lafr. et H’Orb. Syn. Av. i. p. 16. 
Leptonyx rubecula , D^Orb. Yoy. Ois. p. 196, et Megalonyx 
rufogularis , D^Orb. ibid. pi. 7. f. 3. 
Supra fuseus, uropygio rufescentiore: superciliis et pectore 
cum gula Isete rufis : ventre albo nigroque transfasciato : 
lateribus et crisso rufescentibus : rostro corneo : pedibus 
fuscis: long, tota 6*5, alse 2*9, caudse 2*7. 
Hab. Chilia merid. et ins. Chiloe ( Darwin ). 
Mus. P. L. S. 
This is the “ Cheucau ” of the Chilians. It extends from 
Colchagua southwards to Chiloe, frequenting the damp forests. 
For an account of its habits see Darwin, Zool. Beagle, iii. 
p. 73. 
2. Pteroptochus albicollis. 
Pteroptochus albicollis , Kittl. Mem. pres. Acad. Petersb. 
1831, p. 180, pi. 3; Bp. Consp. p. 205; Darw. Yoy. Beag. 
Zool. iii. p. 72; Cab. et Hein. Mus. Hein. ii. p. 21; Gray, 
Faun. Chil. i. p. 303 : Burm. La Plata-Beise, ii. p. 471; Ph. 
et Landb. Cat. Av. Chil. p. 15; Scl. Cat. A. B. p. 169; P. Z. S. 
1867, p. 325; Scl. et Salv. Nomencl. p. 76. 
Megalonyx medias, Less. Ill. de Zool. pi. 60. 
Megalonyx albicollis , Lafr. et D’Orb. Syn. Av. i. p. 15. 
