536 CATALOGUE BIRDS. 



remigibus fiisco-atris ; remigurn omnium, mediis exceptis, pogoniis 

 internis alhis. 

 Length 3 inches. 

 Island of Juan Fernandez. 

 Hylactes, — Novum genus. Megapodio qffine. 



CJiaracteres Generici. 

 Rostrum subelongatum, subtenue, apice subemarginato : naribus 

 basalibusj longitudinalibus, membranci subtumescenti pilisque per 

 media7n longitudinem tectd. 



AlcEj brevissimoB, rotundatoe ; remige 5ta longissimd, 

 Cauda, subehngata, gradata. 



Pedes, fortes : tarsis subelongatis, in fronte scutellatis ; digitis 

 unguibusque elongatis, hie fortioribus subcompressis ; halluce for- 

 tissimo, incumbente. 



This genus appears to have some resemblance to MM. Quoy 

 and Gaimard's genus Megapodius : but no specimen of it being in 

 this country, and my bird differing in essential points from its 

 generic characters, particularly in the length and form of the wings, 

 which in my bird are, rounded, and so short as not to reach beyond 

 the base of the tail, I have formed it into a new genus, for which 

 the term Hylactes (from its note, which very much resembles the 

 sharp bark of a dog) has been selected. 



32. Hylactes Tarnii. — Nob. in Proceedings of Zool. Soc. 

 Hi/L saturate fosco-brunneus ; fronte^ dorso, abdomineque rufiSf hoc 

 fo,sco fosciato. 



At Chilo'e and Port Otway, in the Gulf of Penas. 



The specific name I have selected is in compliment to Mr. John 

 Tarn, surgeon of the Adventure, to whose attention, in procuring 

 and preserving numerous specimens in ornithology, I am greatly 

 indebted, 



33. Strutheo Rhea.— Lin. (223.) 

 The American ostrich. Maldonado. 



34. CoLUMBA Fitz Royii. — Nob. in Proceedings of Zool. Soc. 

 Col. rinacea ; alis, dorso imo, cauddque plumbeis, hujus fascia remi- 



gibusque atris: nuchce plumis viridi-splendentibus ; fascia occipitali 



albd» 



In the woods of Childe. 

 Dedicated to Captain Robert Fitz Roy, who succeeded to the 

 command of H.M.S. Beagle upon the death of Captain Stokes. 



