274 MR. R. SWINHOE ON A NEW CHINESE GULL. [Mar. 21, 



I have long supposed that the common Chinese River-Gj.il was 

 referable to Chroicocephalus UttUUi of Brueh, from the act of its 

 having been so identified by a well-known authority on Birds Prof 

 Schle*el did not agree with this identification and has referred it o 

 L chimneri Bp., of New Zealand. I have thus been led to turn to 

 Sr.tE' ? Ponograph of the Genus ^"gj""^ 

 ' Journal fiir Omithologie,' 1853 ; and there I find that the C./att 

 KtJi Bruch (p. 104), is founded on the drawing of a bird from South 

 rSffi ^reserved at St. Petersburg. The description of this species 

 by no me ns answers to our bird/W does that of C. sckunpen Bp 

 the bilTs of both being "fine red." I cannot, therefore but con- 

 sider our bird an undLribed species, and have much pleasure in 

 Seating it to Mr. Howard Saunders, who is making a special study 

 of the Laridse. Our bird is remarkable for having a high black bill 



incrnplete white eye-ring. Broad collar, upper tajl-coverts, tail, 

 unde p r , ™* axdlaries near the edge of wing pure white no 

 rosiness) Mantle, wing-coverts, and tertianes pearl-grey. Outer 

 3tt white edsed with black for nearly half its basal length and 

 STh inneTweb marked obliquely with black on its basal half, 

 fiT, white border to the shaft, which expands forwards ; second 

 oum with the oblique black advancing nearer the tip and a black 

 band Z the inner web near the tip; third and fourth with greater 

 TTtW inner web black a black band near the tip, and a slight 

 okek Idling ^Ye outer web; the fifth and following feathers are 

 U«5Sr«mS the fifth having a black border to its inner web and a 

 SbS'n ar it tip^he "sixth only a partial black edging to the 

 inner web Outer edge of wing white. Axillaris and under w.ng- 



72M^ g "(shot 19th of November 1867). /i^ Jjodjg 



a few black feathers still remaining ™ th *^'^\$S*- 

 black • irides deep brown. Legs deep tile-red. Length 13 5 inches , 

 ™W 10-75 reaching 2-25 beyond tail. Bare tibia -8, tarse 17; 

 Sdl toe i-15 it flaw -25. Bill, forehead to tip 1-1 lower man- 

 Tble to gape -7 ; depth of bill at angle of gonyc i -4. Tail of 

 fwet fearers, ne'arly P equal, the two centrals and the outer one -2 



^^i^^^™*'-?*' W5/). Bill 

 and irides black Inside of mouth vermilion. Legs dark ind.an- 



white tip. Otherwise as m (1). i^engin io , ™ 6 , r 



33 (4) h mrd not fully mature (shot December 1867). A few brown 



S the grey of the back, the tail is slightly tipped with brown, and 



