32 Mr. J. D. D. La Touche on the [Ibis, 
1916, and saw that day many flocks of this Tern passing 
down the coast. 
256. Hydrochelidon leucoptera (Schinz). 
Hydrochelidon leucoptera D. & O. p. 524 ; La T. p. 582. 
The White-winged Black Tern passes in spring and is 
very abundant during the latter half of August, when it 
travels along the coast in flocks. 
I noticed this Tern on the Newchwang plain in May and 
June, and on the River Liao on the 11th of August, 1889. 
257. Gelochelidon anglica (Mont.). 
Sterna anglica La T. p. 582. 
A single example of the Gull-billed Tern was seen at the 
port on the 4th of May, 1913. 
258. Sterna hirundo tibetana Saunders. 
Sterna fluviatilis D. & O. p. 525. 
I have seen numbers of medium-sized Tern passing in 
flocks during August and September which were probably 
this species or S. longipennis, but none were collected. 
My collector, however, brought me at the beginning of July 
1915 ten eggs and an example of S . tibetana from the coast, 
about twenty miles W.S.W. of Chinwangtao, where he found 
this Tern breeding among the sand-dunes. These eggs are 
brownish olive, deep buff, and yellowish-green, with spots 
and large blotches of dark brown over inky purplish-grey 
blotches, the latter being on the surface as well as within 
the shell. The shape varies from a somewhat oval-ovate to 
broad-ovate. The longest egg measures 1*75 X 1*18 in., 
the shortest 1*53 x 1*17 in., the broadest 1*66 x 1*23 in., 
and the narrowest 1*64x1*13 in. The ten eggs average 
164 X 1*18 in. 
259. Sterna sinensis Gm. 
Sternula sinensis D. & O. p. 527. 
Sterna sinensis La T. p. 582. 
The Chinese Tern arrives about the fourth week in May 
and breeds commonly in the district. It lays three eggs in 
