192 BRITISH BIRDS. 



330. Sterna fuliginosa, Gmel. SOOTY TERN. 

 Hab. Tropical regions of the globe. 

 One was shot in 1852 near Burton-on-Trent, a second in 

 1869 in Berkshire and a third in 1885 near Bath. 



331. Sterna ansestheta, Seop. SCOPOLI'S SOOTY 



TERN. 



Hab. Tropical seas of the globe. 

 One was taken at the mouth of the Thames in 1875 

 (Zool. 1877, p. 213; P.Z.S., 1877, p. 43). 



GENUS CLXXXV. KYDROCHELIDON, Boie (1822). 

 Bill scarcely longer than head. Tail rather short, and 

 but little forked. Feet with the webs more deeply scal- 

 loped than in Sterna. 



332. Hydroehelidon hybrida (Pall.). WHISKERED 



TERN. 



Hab. Southern Palaearctic and Oriental regions ; also 

 Africa and Australia. 



Has occurred in Dorset (1836), Dublin Bay (1839), 

 Yorks (1842), Norfolk (1847), Cornwall (1851), and near 

 Plymouth (1865). 



333. Hydroehelidon leueoptera (Sehinz). 



WHITE-WINGED BLACK TERN. 

 Hab. Southern Palsearctic region. 



An irregular straggler to England in spring ; has also 

 occurred five times in Ireland. 



384. Hydroehelidon nigra (Linn.). BLACK TERN. 



Hab. Europe, north to Baltic ; also N. Africa. 



Adult : whole plumage sooty slate-grey, turning to 

 blackish on head and nape ; vent white ; bill blackish ; 

 feet dull brownish-red. In winter, forehead, nape and 



