NO. 2230. REVIEW OF OCEANODROMALEUCORHOA—OBERHOLSER. 169 



nodroma leucorhoa Icaedingi, but, as shown below, they are certamly 

 not the same as that bird. Specimens from the coast region of Wash- 

 ington and Oregon are most different from Oceanodroma leucorhoa 

 leucorhoa, and in present comparisons these have therefore been used 

 as typical. Those from the latter locality form the basis of Oceano- 

 droma heldingi Emerson.^ The birds from the vicinity of Sitka, 

 described by Emerson as Oceanodroma heali,^ do not, however, as 

 supposed by him, differ in color from the birds of Oregon, such differ- 

 ence as was noted by the describer ^ being due to individual varia- 

 tion. Although the birds from Sitka (Oceanodroma heali) are, it is 

 true, slightly larger than those from Oregon, the difference is alto- 

 gether too slight to warrant recognition in nomenclature, and the 

 two supposed races must therefore be united under the name 

 Oceanodroma heali, which name has anteriority. 



Average measurements of birds from the different parts of the 

 range of this subspecies are added below: 



A nestling taken by Mr. G. Willett (No. 239960, U.S.N.M.) on St. 

 Lazaria Island, Alaska, August 11, 1912, has the body barely covered 

 with down, and is so young that the feathers apparently have just 

 begun to grow. In color it is, above, plain grayish brown, between 

 mouse gray and hair brown ; and below, of the same color but darker. 

 The date of this specimen indicates the breeding season of the species, 

 which is further corroborated by a nestling taken on Carroll Island, 

 Washington, on August 10, 1915. 



Altogether, 99 specimens of this race have been available. In 

 addition to the localities already mentioned and those included in 

 the table of measurements below, the following localities are repre- 

 sented by specimens : 



Neah Bay, Washington; Destruction Island, Washington (July 11, 

 1915); Chemoluro Island, Alaska (May 24 and 28, 1884; June 21, 

 1884); Belkof ski Island, Alaska (September 10, 1893); and Forrester 

 Island, Alaska (June 23, 1887, July, 1913, June 23 and 29, 1914). 



1 Condor, vol. 8, Mar. 20, 1906, p. 54. 



