.Mr. D. G. Elliot on New Species of Birds . 391 
13. Circus cineraceus (Mont.). (Montague's Harrier.) 
14. Circus airuginosus (Linn.). (Marsh Harrier.) 
15. Syrnium aluco (Linn.). (Tawny Owl.) 
16. Brachyotus palustris (Bp.). (Common Short-eared 
Owl.) 
[In enumerating the authorities on the birds of Syria and 
Palestine, in reference to Mr. Tristram's article on the u Orni¬ 
thology of Southern Palestine,” in No. 1 of ‘The Ibis' {vide 
antea, p. 38), we omitted to mention the name of the Marchese 
Orazio Antinori, who has made some interesting discoveries in 
the ornithology of those countries— Cypselus galilceensis and 
Picus cruentalus , described in * Naumannia' (v. p. 307, and vi. 
p. 411). Mr. Gurney's present contribution towards our know¬ 
ledge of the birds of this country gives us an opportunity of 
supplying this omission.— Ed.] 
XXXVIII.— Descriptions of Six New Species of Birds . 
By Daniel G. Elliot, of New York. 
(Plate XIII.) 
1. Thalassidroma gracilis, Elliot, sp. nov. 
Nigro-fuliginosa, fascia alari pallidiore; uropygio abdomineque 
medio albis; rectricibus nigerrimis; cauda emarginata : 
rostro et tarsis gracillimis nigris. 
Sp. Ch. Plumage sooty black. Quill feathers brown. Se¬ 
condary coverts margined with light brown. Rump, upper 
tail-coverts, and middle of abdomen white. Tail black, the two 
outer feathers with a white mark on the lower half of the inner 
web, growing narrower as it ascends; lower half of the shafts 
white, the rest black. Under tail-coverts white, margined with 
black. Breast sooty. Bill black. Tarsi and feet very long 
and slender, black. Length 5*90; wing 5*22; tail 2*40; bill 
0*40; tarsus 1*20. 
Hah . West Coast of America. 
Remarks. This species is very abundant on the coast of Chili, 
only coming to the mainland in the breeding-season. During that 
period, for a great part of the day and night they retire to the 
clefts of the rocks, taking flight only in the early morning. The 
