288 
MR. H. E. DRESSER ON PALLAS’S WILLOW WARBLER 
64 millimetres, internal diameter 42 millimetres, height 130 
millimetres, depth 65 millimetres. The eggs resemble those of the 
Reed Warbler ( Acrocephalus streperus ), but are smaller in size. 
5. Locustella certhiola (Pall . ). Pallas’s Warbler has been 
obtained on one occasion only on Heligoland ; a young bird in first 
autumn dress having been caught at the lighthouse, in the night 
between the 12th and 13th August, 1856. It inhabits during the 
summer season the Altai range and the whole of Siberia from the 
Yenesei to the Pacific, northward to the mouth of the Amoor. In 
winter it migrates to China, India, and Ceylon, ranging as far 
south as the islands of the Malay Archipelago. 
Two other Eastern Warblers are included by Mr. Gatke in his 
history of the birds of Heligoland, viz., Phylloscopus fuscatus 
(Blyth), which Mr. Gatke says he saw, but did not obtain, on the 
24th October, 1876, and Phylloscopus corohatus (Temm. and 
Schleg.), which was said to have been obtained there by Reymers 
on the 4th October, 1843, and passed into the hands of Brandt, 
the dealer, in Hamburg, and has since been lost sight of. As regards 
the former of these, I can only say with Wheelwright, the Old 
Bushman, that “ what’s hit is history, and what’s missed is 
mystery;” and as regards Phylloscopus corona! us, it seems to me 
very improbable that the bird obtained by Reymers belonged to 
that species, and in both cases it will, I think, be wise to exclude 
these birds from the European list, until undoubted specimens are 
obtained. 
It is quite possible that one or other of the above Warblers 
may have visited the British Islands, and boon overlooked, and 
it may therefore be of interest and use to give the distinctive 
characters as follows : — 
Phylloscopus superciliosus is very small, scarcely larger than the 
Goldcrest, has the upper parts dull yellowish green, a distinct 
yellowish stripe over each eye, and two yellowish bands crossing 
each wing, and the under-parts are whitewashed with greenish grey 
on the flanks ; total length about 3.5 inches, wing 2.1 inches. 
Phylloscopus proreyulus is about the same size as, and coloured 
like P. superciliosus, but may readily ho distinguished by having 
a broad median line passing from the base of the bill to the nape, 
besides the superciliary stripes, and the rump and upper tail-coverts 
are lemon yellow ; total length about 3.5 inches, wing 2.1 inches. 
