46 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



tail, sooty-brown ; the external margin of the outer tail feathers, and the tips 

 of all, light greyish brown ; bill and tarsi, black. 



Female. 



All the upper surface, wings, and tail, brown ; throat, greyish white ; the 

 remainder of under surface, pale buff, the feathers of the chest and flanks, 

 with an obscure fine stripe of light brown down the centre. 



Habitat, Galapagos Archipelago. {September.) 



There is nothing remarkable in the habits of this bird. It frequents both the 

 arid and rocky districts near the coast, and the damp woods in the higher parts of 

 several of the islands in the Galapagos Archipelago. 



4. Pyrocephalus dubius. Gould. 



P. minor, lividus ; J route, super ciliis corporeque subtus stramineis ; tectricibus stramineo 

 marginatis. 



Long. tot. 4-ij unc ; alee, 2-fe caudce, l-j%; tarsi, -fa; rost. 



Forehead, stripe over the eye, and all the under surface pale buff ; back of the 

 neck and upper surface chocolate brown ; greater and lesser wing coverts 

 margined with buff. 



Habitat, Galapagos Archipelago, (September). 



From the appearance of this bird when alive, although closely resembling 

 P. nanus, I entertained no doubt that it was a distinct species. Mr. G. R. Gray 

 informs me that there is a specimen of a male in the British Museum, which differs 

 from the male of the precedent species, in having the upper colour of a decided 

 brown, and the external margins of the outer tail feathers and tips of the 

 secondaries rather reddish white ; also in size as stated by Mr. Gould. 



Myiobius. G. R. Gray. 



Tyrannula. Swains. 



Mr. Gould had adopted for the following species Mr. Swainson's generic 

 appellation of Tyrannula, but Mr. G. R. Gray has pointed out, that, as Tyrannulus 

 was proposed and published eleven years before, namely in 1816, by Vieillot, it 

 becomes necessary to change the former name, and therefore he proposes 

 Myiobius. 



