Vol. XXXVIIl 

 1920 



j Supplement to the A. 0. U. Check-List. 441 



Thalassidroma Vigors becomes Hydrobates Boie (Isis, 1822, col. 562; 

 type, by subsequent designation [Gray, List Genera Birds, 1840, 

 p. 78], ProceUaria pelagica Linnaeus), because the latter name is of 

 earlier date, and is not invalidated by Hydrobata Vieillot, a word 

 with a different classical ending. (Cf. Hartert, Hand-List British 

 Birds, 1912, p. 149.) The only North American species is: 

 104. Hydrobates pelagicus (Linnaeus). 



Aestrelata Bonaparte becomes Pterodroma Bonaparte (Compt. Rend. 

 Ac. Sci., XLII, May, 1856, p. 768; type by subsequent designation 

 [Salvin, Cat. Birds Brit. Mus., XXV, 1896, p. 397], ProceUaria macrop- 

 tera Smith), because the earliest place of publication of both Aestrelata 

 and Pterodroma proves to be Comptes Rendus, XLII, May, 1856, 

 p. 768, and here Pterodroma has anteriority. (Cf. Mathews, Birds 

 Australia, II, pt. 2, July 31, 1912, p. 131.) 



Sula cyanops Sundevall becomes Sula dactylatra Lesson (Voyage 

 Coquille, I, April, 1829, p. 494; Ascension Island). (Cf. Mathews, 

 Novit. Zool., XVIII, No. 1, June 17, 1911, pp. 9-10.) While Sula 

 dactylatra is not with certainty determinable at the original place of 

 publication in the 'Voyage of the Coquille,' Lesson himself soon 

 afterward (Traite d'Ornith., 1831, p. 601) made its identity certain. 

 It should, however, date from its first introduction. 



Moris Leach, Syst. Cat. Spec. Indig. Mamm. and Birds Brit. Mus., after 

 August, 1816, p. 35 (type by monotopy, Moris bassana [ = Pelecanus 

 bassa?ius Linnaeus]). Recognized as a genus, and adopted because 

 considered neither a nomen nudum, nor preoccupied by Morum 

 Bolten, although Morus Vieillot, also proposed for the gannets, having 

 a termination differing merely in grammatical gender from Morum 

 Bolten, is thereby invalidated. The name Sulita Mathews (Austral- 

 Avian Record, II, No. 7, Jan. 28, 1915, p. 123; type by original desig- 

 nation and monotypy, Pelecanus bassanus Linnaeus), proposed in 

 place of Moris and Morus, becomes now also a synonym of Moris 

 Leach. (Cf. Oberholser, 'The Auk,' XXXVI, No. 3, July, 1919, 

 p. 417.) The only North American species of this group will there- 

 fore now stand as 



117. Moris bassana (Linnaeus). 



Ibididae becomes Threskiornithidae, because the type of the genus 

 Ibis proves to be a stork, Tantalus ibis Linnaeus; and the proper name 

 for the genus Ibis, the type genus of the family, now becomes Thres- 

 kiornis Gray. (Cf. Mathews, 'The Auk,' XXX, No. 1, January, 

 1913, p. 95; Richmond, Proc. U. S. Nat. Mus., LIII, August 16, 

 1917, pp. 580, 636.) 



Herodias Boie becomes Casmerodius Gloger (Gemein. Hand-und Hilfsb. 

 Naturg., 1842, p. 412; type by subsequent designation [Sharpe, 

 Cat. Birds Brit. Mus., XXVI, 1898, p. 88], Ardea egretta Gmelin), 

 because the type of Herodias Boie is, by subsequent designation 

 (Gray, List Gen. Birds, ed. 2, 1841, p. 86) Ardea garzetta Gmelin 



