TURDUS MACULIROSTRIS, Berl. 
ECUADORIAN DUSKY THRUSH. 
1 Turdus olivaceus (nec Linn.), Lafr. et d'Orb. Syn. Av., Mag. de Zool. 1837, p. 17. 
! Turdus rufiventris (nec Vieill.), d'Orb, Voy. Amer. Mérid. iv. part 3, p. 203 (c. 1840). 
Turdus amaurochalinus (nec Cab.), Scl. & Salv. P. Z. S. 1866, p. 177, 1867, p. 749. 
Turdus poiteaui, Pelz. Orn. Bras. p. 94 (1871, nec Less.). 
Turdus leucomelas (nec Vieill.), Tacz. P. Z. S. 1874, p. 508. 
Turdus ignobilis (nec Scl.), Tacz. P. 7. S. 1882, p. 4; id. Orn. Pérou, i. p. 491 (1884). 
Turdus ignobilis maculirostris, Berl. P. Z. S. 1883, p. 538. 
T. similis T. leucomelani, et rostro in ptilosi zestivä flavo, in ptilosi Метан et in ave hornotino nigricante: minor : 
pallidior: plagá gulari albá obsoletá : gutture obsoleté brunneo striato. 
Count von BERLEPSCH described this species in 1883 from two specimens obtained by Messrs. 
Stolzmann and Siemeradski at Chimbo, in Western Ecuador, in September 1882. The following 
is a translation of his original description and remarks :—“ Very closely allied to T. ignobilis, Scl., 
but differs in the apical half of the bill being yellow; the colour, especially of the breast, paler; 
the back, as well as the wings and outer aspect of the tail, more olive; the under tail-coverts more 
spotted with brown. 
“The birds in the Sclater Collection, obtained by Fraser in Western Ecuador, show the same 
colour of the bill as our specimens from Chimbo ; this distinctive character, therefore, appears to be 
constant. I have not seen examples from Eastern Ecuador, but Bogotá birds have always an entirely 
black bill. 
“ The specimens from Central Peru (Amable Maria) and from Northern Peru (Chirimoto and 
Huambo) have always a wholly dark bill, and a patch of white sufficiently pronounced at the 
bottom of the throat, as it is in Т. leucomelas of Brazil; but this does not appear to be 
constant, for in a female from Huambo this white patch is absent, and the colour of the 
upper parts of the body in these birds is less olive and distinctly darker than in the birds from 
Western Ecuador." 
T. maculirostris, as represented by specimens in the British Museum, seems to be a small race 
of T. leucomelas, extending from Ecuador to Upper Amazonia, Peru, and Bolivia. Тһе examples 
procured by Natterer at Salto Theotonio on the Rio Madeira, and named 7. ротеаиг by Pelzeln (Orn. 
Bras. p. 94), are referable to this species, as I have determined by a personal examination of the skins, 
Which Dr. von Lorenz was so good as to forward to me. 
The adult bird in nesting-plumage has a yellow bill, while the younger individuals and the 
adults in winter plumage have blackish bills. Count von Berlepsch must have described individuals 
in process of change from winter to summer plumage, when the bill changes from black to yellow. 
In these respects the alliance with T. leucomelas is distinctly indicated. Some individuals from Peru 
show the white throat-spot quite plainly, but in other examples in the Museum this spot is scarcely 
2L2 
————— € е C I Ae HELI RR TEE U ET ET Ro рАЦА 
