^°190?^] Fourteenth Supplement to the A. 0. U. Check-List. 389 



IV. PROPOSED ADDITIONS AND CHANGES NOT 

 ACCEPTED. 



Gavia vs. CoUjmhus (cf. Stone, Auk, 1907, 199). A change in 

 this case is obviated by the application of Rule 30 of the new Inter- 

 national Code, now incorporated into the revised A. O. U. Code. 



Colymbus vs. Podiceps {cf. Stone, Auk, 1907, 199). The pro- 

 posed change is unnecessary, being based on the now obsolete 

 "first species" rule. 



Dytes vs. Proctopus (cf. Coues, Osprey, III, 1899, 144). The 

 proposed change is not adopted, since Proctopus is a synonym of 

 Dytes. 



Pseuduria Coue.s {cf. Coues, Osprey, III, 1S99, 144.) The 

 characters, of this proposed subgenus are considered too slight for 

 inclusion in the List. 



Megalestris vs. Cathararta {cf. Poche, Orn. Monatsb., 1904, 23). 

 Catharacta has been usetl for several groups of birds, under various 

 spellings, the first use of one of its variants being for a genus of 

 Penguins, which renders it unavailable for the present genus 

 {cf. Allen, Auk, 1904, 345). 



Blasipus, Chroicocephalus, and 11 ydrocolosus {cf. Coues, Osprey, 

 III, 1899, 144). These proposed subgenera of Larus are not 

 adopted, being chiefly based u{)on pattern of coloration. 



Subgenus Thalasseus vs. genus Pli/droprogne {cf. Salvin & 

 Godman, Biol. Centr.-Amer., Aves, III, 1903, 401). Recognition 

 as a genus not considered desirable; furthermore, Thalasseus is 

 the proper name for the group. {Cf. Allen, Bull. Am. Mus. N. H., 

 XXIV, 1908, 10, 39.) 



Thalassogeron vs. Diomedea {cf. Rothschild, Bull. Brit. Orn. 

 Club, XV, 1904, 4.5). No reasons have been offered for the pro- 

 posed change. 



Oceanodrovia heali Emerson, Condor, VIII, 1906, 54. 



