132 Mr. R. Hall on Birds 



Stages H, J, K, M, and N are clear stops in the " ladder " 

 of development to the mature form. 



10. Petrceca goodknovii. Red-capped Rohin. (Ilall's 

 Key, p. 13.) 



Young sk. Long Island, Pelsart Group, Houtman's 

 Abrolhos. 27.10.99. 



Tliis species is generally mentioned as met with singly or 

 in pairs, I saw only one specimen ujion the whole group, 

 the species being now recorded from the Abrolhos for the first 

 time. The struggle of so young a bird to reach an island 

 forty miles from the mainland must have been great. No 

 assistance to do so would, most likely, be given to it beyond 

 the strong off-shore wind with which it started. An island- 

 life did not seem to have affected its short course of conti- 

 nental manners, for it flew from stone to stone instead of 

 from branch to branch, keeping to the beacli and behaving 

 just as a Robin does. 



The bird was so young that the fledgling feathers still 

 remained in places, and the forehead bore no trace of a red 

 flush ; commissure yellow ; length of wing 2"4 inches. 



11. Petikeca bicolor. Hooded Robin. (Hall's Key, 



p. 14.) 



A. Sk. ad. S- 7.10.99. -X 



B-C. Sks. ad. ? s. 5.10.99. / ^. 



-ri ^ -nx 1,- ^,r^«,^ >- Katannnig. 



D. S- Moulting. 6.10.99. V ^ 



E. Young. 5.10.99.-' 



F. Young. 6.10.99. :N an nine. Cue. 



Specimen D. — This bird is in a tricolor state — white, brown, 

 and black. It does not show the streaked brown or white of 

 the young, nor the bhick of the adult (there is a uniform 

 brown phase that seems to indicate a stage between them). 

 All the upper surface is In'own and black intermixed, the 

 browns eventually giving way to the blacks. On the inter- 

 scapulium and back is a small patch of black feathers with 

 merely a few that are brown; the throat is jet-black; the 

 cheeks shew a mixture of black and brown ; the breast and 

 abdomen are white; the scapulars not a clear white; the 

 wings and tail are marked with white as in the adult ; the 



