652 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



[Hydrocoloeus] minutus Bonaparte, Compt. Rend., xiii, 1856, 771. — Heine and 

 Reichenow, Nom. Mus. Hein. Orn., 1890, 359. 



Chroicocephalus minutus Eyton, Cat. Brit. Birds, 1836, 54. — Reichenbach, 

 Av. Syst. Nat., Longipennes, 1852, p. v.— Bruch, Journ. fiir Orn., 1853, 

 105. — Brehm, Naumaunia, 1855, 295; Vogelf., 1855, 343. — Lawrence, in 

 Baird, Rep. Pacific R. R. Surv., ix, 1858, 853. — Baird, Cat. N. Am. Birds, 

 1859, no. 671.— CouES, Proc. Ac. Nat. Sci. Pliila., 1862, 311 (monogr.).— 

 Salvadori, Ucc. Sardin., 1864, 124. — Saunders, Ibis, 1871, 399 (s. Spain). — 

 Taczanowski, Journ. fiir Orn., 1873, 111 (e. Siberia); Bull. Soc. Zool. France, 

 1876, 264 (e. Siberia); Ornis, 1888, 508 (Poland); Mem. Ac. St. Petersb., 

 xxxix, 1893, 1043 (e. Siberia). — Giglioli, Ibis, 1881, 218 (Italian records). — 

 Radde, Orn. Caucas., 1884, 483. 



[Chroicocephalus] minutus Lichtenstein, Nom. Av. Mus. Berol., 1854, 98. 



Chroocephalus minutus Salvador:, Faun. Ital.,Ucc., 1872, 289. — Giglioli, Avif. 

 Ital., 1886, 422; i. Resoc. Avif. Ital., 1889, 638; ii. Resoc, 1890, 648; iii. 

 Resoc, 1891, 509. 



Gavia minuta Macgillivray, Man. Brit. Orn., pt. ii, 1842, 242; Brit. Birds, v, 

 1852, 613. — Severtzov, Turkestan. Jevotnie, 1873, 70 (Turkestan, up to 

 1,000 ft.). 



G[avia'\ minuta Blasius, Journ. fiir Orn., 1865, 371 (crit.). 



Lams afrlcllloides Falck, Reise Russl., v, 1786, 355, pi. 24 (Siberia). 



[Larus] atriciUoides Gmelin, Syst. Nat., i, pt. ii, 1789, 601. — Latham, Index Orn., 

 ii, 1790, 813. 



Larus d'orbignni Audouin, Hist. Nat. de I'Egypte, 1825, pi. 9, fig. 3; Expl. 

 Planch. Ois. Egypte, 2d ed., 1828, 341. — Lesson, Hist. Nat. Mam. et Ois., 

 ix, 1837, 516. 



L[arus] d'orhignyi Gray, Gen. Birds, iii, 1846, 654. 



Larus nigrotis Lesson, Traite d'Orn., 1831, 619 (see Pucheran, Rev. et Mag. 

 Zool., 1850, 15, and Hartlaub, Journ. fiir Orn., 1855, 420). 



L[arus] nigrotis Gray, Gen. Birds, iii, 1846, 654. 



L[arus] pygmseus Gray, Gen. Birds, iii, 1846, 654 (based on "St. Vine. Exp. de 

 la Moree, Ois. t. 5-'). 



Genus BLASIPUS Bruch. 



Blasipus Bruch, Journ. fiir Orn., 1853, 108. (Type, Larus modcstus Tschudi.) 

 Blacipus (emejidation) Heine and Reichenow, Nom. Mus. Hein. Orn., 1890, 357. 

 Epitelolarus Heine and Reichenow, Nom. Mus. Hein. Orn., 1890, 359. (Type, 

 Larus heermanni Cassin.) 



Medium-sized Larid^B (wiiig 312-376 mm.) with mider parts plain 

 sooty brown or deep browJiish gray (white in one species), aiid tail 

 mostly gray or blackish in adults ; youjig mostly plain grayish brown, 

 in some species with feathers of upper parts terminally margined or 

 tipped with paler brown, whitish or buffy. 



Range. — Pacific coast of America (Chile to British Columbia). 

 (Four species.) 



KEY TO THE SPECIES OF BLASIPUS." 



a. Upper parts plain slate-gray, deep neutral gray, dark gull gray, on fuscous; under 

 parts plain gray or white; tail plain gray, almost uniformly black with white 

 tip, black with white bars and tip, or gray with a subterminal black band; fore- 

 head and chin white, the rest of head slaty black, or else whole head (and neck) 

 white. (Adults.) 



o Prepared at my request by Mr. J. H. Riley. 



