60 



anything hitherto known ; the fine series of Formicariidce, embracing 

 upwards of thirty species, of which several appear to be undescribed ; 

 and a new bird of the peculiar South American family Pteropto- 

 chidce, forming a link between Merulaxis and Scytalopus. 



1. Rostrhamus sociabjlis (Vieill.), Bp. Consp. i. p. 20 ; 

 Strickl. Orn. Syn. p. 136, juv. 



2. Scops ? 



This bird seems certainly different from any of the S. American 

 members of the genus with which I am acquainted, and M. Jules 

 Verreaux has attached a new name to it, considering it to be unde- 

 scribed. Although several naturalists have paid much attention to 

 the Strigidce of late years, there is still much confusion in several of 

 the groups as to the distinctness of the different species, and in none 

 perhaps more than in the difficult genus to which this bird belongs. 

 I am therefore unwilling to describe the present example as new 

 until I can give a general review of all the American species of the 

 genus. 



3. Acanthylis albicollis (Vieill.), Sclater, P. Z. S. 1854, 

 p. 110. 



4. Trogon viridis, Linn.; Bp. Consp. p. 148. — T. melano- 

 pterus, Gould, Mon. pi. 10, 11. 



5. Trogon ramonianus, Dev. & DesMurs, Rev. et Mag. de 

 Zool. 1849, p. 331 ; Voy. Castelnau, Zool. Ois. p. 33. pi. 11. fig. 2. 



6. Pharomacrus antisiensis (D'Orb. & Lafr.). — Calurus pul- 

 chellus, Gould. 



7. Pharomacrus auriceps (Gould), Bp. Consp. p. 152. 



8. Bucco hyperrhynchus, Sclater, P. Z. S. 1855, p. 193. 

 pi. cv. 



9. Bucco macrodactylus (Spix), Sclater, Syn. of Bucc. p. 14. 



10. Malacoptila unitorques, DuBus. 



I am still doubtful about the real specific distinctness of this species 

 and M. niffrifusca from 31. fusca of Cayenne. See my remarks in 

 P. Z. S. 1855, p. 195. 



11. Nonnula frontalis, Sclater, Mon. Bucc. p. 20. 



A specimen apparently referable to this Bogota species, but with- 

 out any appearance of the rufous front of the adult. 



12. Monasa peruana, Sclater, P. Z. S. 1855, p. 194. 



13. Monasa nigrifrons, Spix. 



