cxxxviil INTRODUCTION. 
397. Hydrochelidon leucopareia ......... Vol. V. PI. LXXVII. 
Whiskered Tern. 
An accidental visitor from Eastern Europe. 
Genus Anous. 
398. Anous stoltdus. 
Noddy Tern. 
A bird common to many seas ; it is not therefore surprising that a solitary individual has now and then 
wandered to fish in our waters. It is a common species, very generally known, consequently not figured. 
Subfamily STERCORARIIN.®. 
Genus Stercorarius. 
Parasitic Gulls are to a certain extent affined to the Petrels, and for this reason have been placed next 
them in the present volume. Members of this group, which are eight or ten in number, frequent the seas of 
both hemispheres, are tyrants of the ocean, waging war and domineering over all the birds, and robbing 
them of the fish they have taken. 
399. Stercorarius catarrhactes ......... Vol. V. PI. LXXVIII. 
Great Skua. 
Found all round our seas at one season or the other. Breeds in the Orkneys. 
400. Stercorarius pomatorhinus ......... Vol. V. PI. LXXIX. 
POMATORHINE SkUA. 
A constant winter visitor. Breeds in Lapland and Flnmark. 
401. Stercorarius parasiticus .......... Vol. V. PI. LXXX. 
Arctic Skua. 
Resident around our coasts. Breeds in Orkney and Shetland. 
402. Stercorarius longicaudus ......... Vol. V. PI. LXXXI. 
Long-tailed Skua. 
A rare winter visitant from the north-eastern seas. 
