48 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



3. Myiobius parvirostris. 



Tyrannula parvirostris, Gould, MS. 

 M. supra rufobrunneus ; pileo, nucha humerisque obscurb olivaceo- brunneis; alis brunneis, 

 primariarum et secundariarum marginibus exterius anguste tectricumque late 

 ferrugineis ; caudd guttureque griseo-brunneis ; pectore abdomineque fiavescenti 

 brunneis. 

 Long. tot. 4J-| unc. ; alee, 2~ ; caudm, 2-^ ; tarsi, -^ ; rost. -fy. 



Crown of the head, back of the neck, and shoulders, dark olive brown ; back 

 and upper tail coverts rufous brown ; wings brown ; the external edges of 

 the primaries and secondaries finely, and the greater and lesser wing coverts 

 broadly margined with ferruginous ; tail uniform greyish brown ; throat 

 brownish grey ; chest and abdomen sandy brown ; upper mandible dark 

 brown ; under mandible yellowish brown ; feet blackish brown. 

 Habitat, Tierra del Fuego, Chile, and La Plata. 



This bird inhabits the forests of Tierra del Fuego, and as I procured 

 specimens of it in the beginning of winter (June), it probably remains throughout 

 the year in the extreme southern part of South America. Other specimens were 

 procured on the banks of the Plata, and near Valparaiso in Chile ; it has there- 

 fore a wide range. 



4. Myiobius magnirostris. 



Plate VIII. 



Tyrannula magnirostris. Gould, MS. 



M. Fcem. Supra olivaceo-brunnea ; caudd brunned ; rectricum externarum marginibus 

 griseo-brunneis; gutture pectoreque olivaceo griseis; abdomine caudceque tectricibus 

 inferioribus pallide Jlavis ; alis saturate brunneis, secundariis tectricibusque late 

 griseo marginatis. 



Long tot. 5 T 6 2 ; alee, 2-& ; caudm, 2 T 6 j- ; tarsi, i| ; rost. T %. 



Crown of the head and back olive brown ; tail brown ; the external margins of 

 the two outer feathers greyish brown ; throat and chest olive grey ; abdomen 

 and under tail coverts very pale citron yellow ; wings dark brown ; second- 

 aries, greater and lesser wing covepts broadly margined with grey ; bill and 

 feet black. 

 Habitat, Chatham Island, Galapagos Archipelago (October). 



This bird and the Pyocephalus nanus, inhabit the same island. Not very 



uncommon. 



