. A history of British birds . ntle to rump grey, lighter on shoulders ; pri-maries, first, second, and third smoke-brown on outer web andshaft, this colour running round the tip, and some way upthe inner web, the remainder of which is white ; on the fourthand fifth the white portion increases, but the shaft continuesdark, although successively becoming lighter, till on the tenthit is pure white ; in the sixth the dark marking on the websbecomes a brown bar, which gradually decreases until it isnearly lost in the ninth, and totally so in the tenth primary,which is entirely white; these dark ti
. A history of British birds . ntle to rump grey, lighter on shoulders ; pri-maries, first, second, and third smoke-brown on outer web andshaft, this colour running round the tip, and some way upthe inner web, the remainder of which is white ; on the fourthand fifth the white portion increases, but the shaft continuesdark, although successively becoming lighter, till on the tenthit is pure white ; in the sixth the dark marking on the websbecomes a brown bar, which gradually decreases until it isnearly lost in the ninth, and totally so in the tenth primary,which is entirely white; these dark tips give a very prettybarred appearance to the wings; secondaries pearl-grey,passing into white, thus forming a white band; carpals andupper wing-coverts smoke-brown, faintly tipped with white ;lower wing-coverts grey, like the mantle, but tertials smoke-brown ; tail pure white in one specimen; in the other thethird and fourth feathers on each side are barred with smoke-brown (Ibis, 1875, p. 485). 584 GA VLE. laridj:. LaRUS PHILADELPHIA (Ord*). BONAPAKTIAN GULL. Lams Bonapartii. Larus.—Bill of moderate length, strong, hard, compressed, cutting, slightlydecurved towards the point, lower mandible shorter than the upper, the sym-phisis angvilar, prominent. Nostrils lateral, near the middle of the beak,pierced longitudinally, pervious. Legs moderately slender, lower part of thetibise naked, the tarsus long, three toes in front entirely palmated, the hindtoe free, short, but not rudimentary, articulated high up on the tarsus abovethe line of the other toes. Wings long, the first and second quill-feathers varyingslightly in their relative length, but nearly equal. Tail square at the end. The late William Thompson was the first to record theoccurrence of this small American Gull in the BritishIslands (Ann. & Mag. N. H. 1848, i. p. 192). A speci-men was killed on the tidal portion of the river Lagan,between Ormeau Bridge and the Botanic Garden, about a SteiiKt Philadelphia,
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Keywords: ., bookauthorsaun, bookcentury1800, bookdecade1870, booksubjectbirds
