6^ STERNA. 



n. Ad. sk. 

 o. Imm. sk. 



J). Imm. sk. 

 <j. Imm. sk. 

 r, s. d" imm. sk. 



Yezo, Japan {Adml. St. John). 

 Swatow, China, autumn (F. 



Sty an). 

 New Guinea. 



New Guinea (A. It. Wallace). 

 Solomon Islands. 



t. (5 imm. sk. Rubiana, Solomon Islands, 



March. 

 u, V. S inim. sk. Ton^rka, Malay Peninsula, May 



( fV. JJavison). 

 10. Malacca, 



.r. cj imm. sk. Tmiso, Ceylon, June {Col. W. 



V. Lefjy'e). 



Tweeddale Coll. 

 H. Saunders Coll. 



WaUace Coll. 

 Tweeddale Coll. 

 CM. Woodford, Esq. 



[C.]. 

 CM. Woodford, Esq. 



[C]. 

 Hume Coll. 



Hume Colli 

 Hume Coll. 



10. Sterna albigena. 



Sterna albigena, Lickt. Nomencl. Av. p. 98 (18o4) (Arabia and 

 Nubia): Rvkhenb. Nnt.at., Suppl. xi. pi. xxi. fig. 816 (1850); 

 Kmiff-ll'arth. Ibis, 18C0, p. 43i>; Heuffl. in Peterm. Mitth. 1861, 

 p. 29, no. 307 (descr.) ; id. Faun. Roth. Meer. p. 32 (1861) ; A. E. 

 Brehm, Reh. Habesch, p. 229 (1863 : Red Sea) ; ScJileff. Mus. 

 P.-Bas, SterniB, p. 20 (1863) ; Bias. J. f. 0. 1866, pp. 75, 79, 

 86, 87 (critical) ; Finsch S,- Hartl. Vog. Ost-Afr. iv. p. 834, tab. x. 

 tig. 2 (1870) ; Wahlen, Ibis, 1876, p. 384 (Ilurnee, Bombay) ; 

 Saunders, P. Z. S. 1876, p. 648 (revision Sterninse) ; Hume, Str. 

 F. 1876, p. 4G7 (Laccadives) ; Butler, op. cit. 1877, p. 298 (Mekran 

 coast) ; id. torn. cit. p. 323 (Karachi) ; Hume, op. cit. viii. 1879, 

 p. 116 (List) : Vidal, op. cit. ix. 1880, p. 94 (Malabar coast) (in 

 coll.) ; Ttceedd. Mem. p. 436 (1881) ; Salviii, Cat. Strickl. Coll. 

 p. 623 (1882) ; Yerbury, Ibis, 1886, p. 23 (Aden) ; Harfert, Katal. 

 Vogelsamml. Senckenh.'^. 2.39 (1891) ; Barnes, Ibis, 1893, p. 176 

 (Aden) ; Sharpe, Bull. B. 0. C. xi. p. v (1893: Suakin). 



Hydrocecropis albigena, Boie, Isis, 1844, p. 179. 



Hydrocheiidon albigena, Bjj. C. R. xlii. p. 773 (1856) ; Heiigl. Om. 

 'N.O.-Afr. Bd. ii. pt. 2, p. 1451 (1871) ; Gray, Hand-l. B. iii. 

 p. 122, no. 11077 (1871). 



Sterna senegalensis, Hmql. Ibis, 1859, p. 351 (Red Sea) (wee Stcains.) ; 

 id. Peterm. Mitth. 1860, pp. 339, 349 ; Emig-Warth. Ibis, 1860, 

 p. 125 (e/. p. 432) (Red Sea). 



Adult in hreecUnrj-plumage. Similar to the foregoing, but the mantle 

 of a much darker grey, the secondaries merely edged with white 

 and chiefly smoke-grey, the shafts of the inner primaries brownish 

 white ; the rump and tail-feathers grey like the mantle, with darker 

 outer webs to the streamers ; underparts viuaceous grey, much 

 darker than in S.JIuviatilis \ under tail-coverts and wing-coverts 

 paler grey : bill slender, much elongated in front of the angle, 

 orange-red at the base, the anterior portion horn-coloured : " irides 

 deep brown "' (Hume) ; tarsi and feet orange-yellow, delicate, slender, 

 with long claws. Total length 14 inches, culmen I'B, wing 9-8, tail 

 6-5, depth of fork 3'35, tarsus 0"75, middle toe and claw O'Oo. The 

 sexes are alike in plumage, with, perhaps, shorter streamers in the 

 female. 



Adult in winter. Forehead mottled with white, and the under- 



