observed during the Voyage of the 'Valhalla' 671 



(ESTRELATA ARMINGONIANA Gigl. & Salvad. 



(Estrelata arming oniana Gigl. & Salvad. Ibis, 1869, 

 pp. 62, 66. 



(Estrelata mollis Saunders, P. Z. S. 1880, p. 164. 



(Estrelata armingoniana Salvin, Cat. B. B. M. xxv. p. 413; 

 Nicoll, Ibis, 1904, p. 41 ; Bull. B. O. C. xvi. p. 102. 



One male and one female. 



The three supposed speeies of (Estrelata on this island are 

 very confusing. I feel sure, however, that there are at most 

 two species only, and that if a sufficiently large series were 

 examined it would be found that Dr. Sharpe's (E. ivilsoni is 

 either a freshly moulted (E. armingoniana or another phase of 

 plumage of that species. The example of (E. armingoniana 

 which was obtained by Lord Crawford on South Trinidad in 

 1874, and is now in the British Museum, answers perfectly 

 to the description of that species by Giglioli & Salvadori, 

 as also do the two specimens which I obtained there, as 

 mentioned above. (Estrelata wilsoni only differs from these 

 examples in being slightly slaty above, and in having a 

 somewhat larger bill ; the latter character, however, is 

 variable, as some specimens of (E. wilsoni have smaller bills 

 than others. I can give no field-notes on this species, as 

 until I compared my specimens with that in the Museum 

 I had no idea that they belonged to the present species, 

 and never having seen a skin of (E. armingoniana, I was 

 looking for a much browner bird. 



CESTRELATA WILSONI Sharpe. 



(Estrelata wilsoni Sharpe, Bull. B. O. C. xii. p, 49; Nicoll, 

 Bull. B. O. C. xvi. p. 103. 



Six males and seven females, light and dark forms. 



This species, if it is distinct from (E. armingoniana, which 

 I much doubt, is the most abundant Petrel and, next to the 

 "White Tern, the most abundant bird on South Trinidad. At 

 the time of our visit, on January 3rd & 4th, it was only 

 commencing to breed and I found but one egg. Several 

 individuals of the light phase were sitting together in pairs 

 in holes and under overhanging parts of the soft and 

 crumbling rocks up the hill-side. I saw no birds of the dark 



