536 CATALOGUE—BIRDS. 
remigibus fusco-atris ; remigum omnium, mediis exceptis, pogoniis 
anternis albis. 
Length 5 inches. 
Island of Juan Fernandez. 
Hyxactes.— Novum genus. Megapodio affine. 
Characteres Generic. 
Rostrum subelongatum, subtenue, apice subemarginato: naribus 
basalibus, longitudinalibus, membrand subtumescenti pilisque per 
mediam longitudinem tectd. 
Ale, brevissime, rotundate ; remige Sta longissimd. 
Cauda, subelongata, gradata. 
Pedes, fortes: tarsis subelongatis, in fronte scutellatis ; digitis 
unguibusque elongatis, hic 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. Hyiacrres Tarni1.—Nob. in Proceedings of Zool. Soc. 
Hyl. saturate fusco-brunneus ; fronte, dorso, abdomineque rufis, hoc 
Jusco fasciato. 
At Childe and Port Otway, in the Gulf of Peiias. 
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. SrrutHEO RuEA.—Lin. (223.) 
The American ostrich. Maldonado. 
34. Cotumpa Firz Royi1.—Nob. in Proceedings of Zool. Soc. 
Col. rinacea ; alis, dorso imo, caudaque plumbeis, hujus fascid remi- 
gibusque atris: nuche plumis viridi-splendentibus ; fascia occipitalt 
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. 
