SUMMARY OF CHANGES. 385 



Arqnntella marilima ptilocncmis (CouEs), 1873, becomes A. pHlocncmis pHloc- 

 nemis. 



Arquatella maritima couesi Ridgway, 1880, becomes A . ptilocnemis couesi. 

 These two races are regarded as specifically different from A. maritima 

 and therefore take the specific name ptilocnemis. (Cf. Ridgway, Bull. 

 U. S. Nat. Mus., No. 50, Pt. VIII, 247.) (p. 118) 



Arquatella maritima maritima becomes A. maritima. 



By establishing A . ptilocnemis as a distinct species there remains only one 

 race of maritima and the trinomial form is unnecessary, (p. 118) 



Pisobia aurita (Latham), 1819, becomes Pisobia acuminata Horsfield, 1821. 

 The drawing upon which the former name was based proves to represent 

 Actitis hypoleuca (Linnaeus) and hence is not available for this species 

 for which acuminata seems to be the first valid name. (p. 119) 



Pisobia maculata (Vieillot\ 1819, becomes Pisobia melanotos (Vieillot), 1919. 

 On grounds of priority. (Cf. Wetmore, Bull. U. S. Nat. Mus., No. 133. 

 153.) (p. 119) 



Pisobia damacensis (Horsfield), 1821, becomes Pisobia subminuta (Midden- 

 dorff), 1851. 

 The former name proves to be a synonym of P. ruficollis and unavailable 

 for this species for which subminuta is the earliest name. (Cf. Hartert, 

 Novitates Zool., XXIII, 1916, 92.) (p. 120) 



Erolia ferruginea (Brunnich), 1764, becomes Erolia testacea (Pallas), 1764. 

 On grounds of priority, (p. 121) 



Macrorhaniphus Forster, 1817, becomes Limnodro^nus Wied, 1833. 



The former is invalidated by Macrorhamphus Fischer, 1813, and Limno- 

 dromus is the earliest available name. (Cf. Mathews, Novitates Zool., 

 XVIII, No. 1, 22.) (p. 122) 



Machetes Cuvier, 1817, becomes Philomachus Anonymous, 1804. 



On grounds of priority. (Cf. Richmond, Proc. U. S. Nat. Mus., LIII, 

 581.) (p. 125) 



Megalestiis Bonaparte, 1856, becomes Catharacta Brxjnnich, 1764. 



It is held that the latter is not invalidated by Catarractes Brisson, 1760, 

 and is prior to Megalestris. (Cf. Mathews, Novitates Zool., XVII, No. 

 3, 498.) (p. 129) 



Larus franklini Richardson, 1832, becomes Larus pipixcan Wagler, 1831. 

 On grounds of priority. (Cf. Mathews and Iredale, Austral Avian Rec- 

 ord, IV, No. 6, Aug. 1, 1921, 156.) (p. 134) 



Sterna has been divided; S. maxima, elegans and sandviceiisis are referred to 

 Thalasseus and caspia to Hydroprogne. (p. 141) 



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