100 LAEIDJE. 



Iforthern species. If not S. aleutica, I can only suggest that it may- 

 be the young of S. loivjipennis, not yet known in this stage. 

 • Hah. Coast and islands of Alaska ; also Asiatic side of Bering 

 Sea, and South-east Japan. 



a. 5 ad. sk. St. Michael's, Alaska, Aug. H. Saunders Coll. 



[L. M. Turner), 

 b-d, c? 2 ad. sk. St. Michael's, Alaska, June- Salvin-Godman Coll. 



July (i. M.T.). 

 e-n. (S , o-q. 5 St. Michael's, Alaska, June- Salvin-Godman Coll. 



ad. sk. July {E. W. Nelson). 



r. Pull. sk. [?] ; s- St. Michael's, Alaska, July Salvin-Godman Coll. 



u. 2 ad.; v-z. 29-Sept. 1 {E. W. N.). 



Juv. sk. 

 a'. Ad. sk. Inaboye, off Yedo, Japan. Seehohm Coll. 



21. Sterna lunata. 



Sterna lunata, Peak, U.S. E.vpl. Kvp., Birds, p. 277 (1848 : Vincennes 

 I., Paumotu Group) ; Hartl. Wierpn. Arch. 1852, p. 125 ; id. J. f. O. 

 1854, p. 170 ; Cassin, U.S. Krpl. Kvp., Birds, p. 382 (1858) ; Gray, 

 Cat. B. Trop. Is. p. 59 (1859) ; Schlegel, Mas. P.-B., Sternas, p. 27 

 (1863 : Halmahera) ; Finsch k Hartl. Faun. Centralpulyn. p. 231, 

 pi. xiii. fig. 3 (1867 : McKean's Is.) ; Hartl. P. Z. S. 1867. p. 831 

 (Pelew Is.) ; Hartl. Hf Finsch, op. cit. 1868, pp. 4, 9, & 118 : Scl. 

 op. cit. 1869, p. 124 (Solomon Is.) ; Hartl. (^- P'insch, op. cit. 1872, 

 pp. 90 & 113 (Pelew and Mackenzie Is.) ; Finsch, Journ. Mus. 

 Godefr. Hft. viii. p. 41 (1875 : Pelew Is.) ; Rosenb. Reistocht. 

 Geelvinkb. p. 9 (1875) ; Layard, Ibis, 1876, p. 393_ (Fiji Is.) ; 

 Saunders, P. Z. S. 1876, p. 665 (revision) ; id. Journ. Linn. Sac. xiv. 

 p. 404 (1878 : distribution) ; Tristr. Ibis, 1882. p. 144 (Solomon 

 Is.) ; Stej7i. Pr. U.S. Nat. Mus. sii. p. 379 (1889 : Kaui I.) ; 

 Lister, P. Z. S. 1891, pp. 296 & 300 (Phcenix Group). 



Haliplana lunata, Coues, Ibis, 1864, p. 392 ; Bins. J. f. 0. 1866. p. 80 : 

 Cones, B. N.- W. pp. 698 & 703 (1874 : critical) ; Rothsch. Avif. 

 Laysan ^-c. i. p. 37, pi. (1893). 



Hydrochelidou lunata. Gray, Hand-IB. iii. p. 122, no. 11081 (1871). 



Onychoprion luuatus, Salvad. Ann. Mus. Civ. Gen. xviii. p. 409 

 (1882) ; id. Orn. Papuasia ^c. iii. p. 451 (1882) ; Vorderm. Nat. 

 Tijdschr. Nederl. Lid. li. p. 247 (1891 : S. Sumatra) | ?] ; Wiglesw. 

 Abh. k. Mus. Dresd. 1890-91, no. vi. p. 76 (1892). 



Adult in h'eeding-pjlumage. Centre of forehead and the super- 

 ciliary line thence to behind the eye white ; loral stripe, crown, and 

 nape black ; hind neck grey ; mantle and tail-coverts dark slate- 

 grey, the secondaries not tipped with white but only greyish white 

 on their inner webs ; primaries chiefly smoke-grey, with white 

 " wedges " to the centres of the inner webs, shafts brown ; tail- 

 feathers chiefly smoke-grey, except at their bases which are whitish, 

 the outer pair quite white on the exterior webs and only grej^ for 

 about 2 inches from the tips of the inner webs ; underparts white : 

 bill black ; tarsi and toes reddish black, the inner webs considerably 

 excised, the toes slender, the claws rather long and curved. Total 

 length 15 inches, culmen 1"9, wing 10-5, tail 6'75, depth of fork 

 2'7, tarsus O'S, middle toe with claw 1*25. 



