202 Proposed Changes in the A. 0. U. Check-List. [April 



fThyellodroma Stejneger, Proc. U. S. Nat. Mus., XI, Nov. 8, 1888, p. 93 

 (type, Puffinus sphenurus Gould). Recognized as a genus (cf. Mathews 

 and Iredale, Ibis, 1915, pp. 596-600; Oberholser, The Auk, XXXIV, 

 No. 4, Oct., 1917, pp. 471-472). Includes the following species now 

 in the genus Puffinus: 



Thyellodroma cuneata (Salvin). 

 Thyellodroma bulleri (Salvin). 

 Puffinus pacificus alleni Mathews becomes Thyellodroma cuneata 



(Salvin). (Cf. Mathews and Iredale, Ibis, 1915, p. 600.) 

 Priofinus cinereus (Gmelin) becomes Procellaria cinerea Gmelin, 

 because not generically distinct from Procellaria sequinoctialis. 

 (Cf. Mathews, Birds Australia, II, pt. 1, May 30, 1912, p. 106.) 



fiEstrelata diabolica (Lafresnaye). Procellaria diabolica Lafresnaye, 

 Rev. Zool., 1844, p. 168 (Guadeloupe Island, West Indies). Records 

 of Mstrelata hasitata from several localities in the eastern United 

 States prove to belong to this species. (Cf. Noble, Bull. Mus. Comp. 

 Zool., LX, No. 10, Aug., 1916, pp. 370-374.) 

 Pelagodroma marina (Latham) becomes Pelagodroma marina 

 hypoleuca (Moquin-Tandon) ( Thalassidroma hypoleuca Moquin- 

 Tandon, in Webb, Berthelot, and Moquin-Tandon, Orn. Canarienne, 

 1841, p. 45; Teneriffe, Canary Islands), by recognition of an Atlantic 

 subspecies. (Cf. Bannerman, Ibis, 1914, pp. 61-62.) 



fOceanodroma hornbyi (Gray). Thalassidroma hornbyi Gray, Proc. 

 Zool. Soc. Lond., 1853 (July 25, 1854), p. 62 (northwest coast of 

 America). Restored to the list of North American birds. (Cf. 

 Oberholser, The Auk, XXXIV, No. 4, Oct., 1917, p. 466.) 



fOceanodroma leucorhoa beali Emerson. Oceanodroma beali Emerson, 

 Condor, VIII, No. 2, March 20, 1906, p. 54 (Sitka Bay, Alaska). 

 Revived as a species (cf. Willett, Condor, XVI, No. 2, March 15, 

 1915, p. 75); recognized as a subspecies of Oceanodroma leucorhoa 

 (cf. Oberholser, Proc. U. S. Nat. Mus., LIV, Oct. 19, 1917, p. 168). 

 Oceanodroma socorroensis Townsend becomes Oceanodroma mo- 

 norhis socorroensis Townsend. (Cf. Mathews and Iredale, Ibis, 

 1915, p. 580.) 



fLeptophaethon Mathews. New genus. Mathews, Austral Avian 

 Record, II, Nos. 2-3, Oct. 23, 1913, p. 56 (type, Phaethon leplurus 

 dorotheoe Mathews). Includes only one North American species, 

 now in the genus Phaethon: 



Leptophsethon catesbyi (Brandt). 



fScaeophaethon Mathews. New genus. Mathews, Austral Avian 

 Record, II, Nos. 2-3, Oct. 23, 1913, p. 56 (type, Phaethon rubricauda 

 westralis Mathews). Includes only one North American species now 

 in the genus Phaethon: 



Scseophaethon rubricaudus (Boddsert). 1 



fPiscatrix Reichenbach, Naturl. Syst. Vogel, 1852 (1853), p. VI (type, 



i See Second Annual List, ' The Auk,' XXXIV, 1917, p. 199. 



