NO. 2230. REVIEW OF OCEANODROMA LEUGORHOA—OBERHOLSER. 167 



since fresh birds are usually darker. The more or less plumbeous cast 

 of the plumage is entirely an individual variation, and the complete 

 lack of it is often due to the age of the skin, like the brownish cast 

 above mentioned. The whitish edgings on the secondaries and 

 tertials, used sometimes by authors as a subspecific or specific dis- 

 tinction, are an indication of fresh plumage, for these apparently 

 soon either partially or completely wear away by abrasion of the 

 feathers. The measurements given above bring out the fact that 

 the female of this subspecies, as in all the other forms of the species, 

 averages slightly larger than the male. 



The writer has examined 34 specimens of Oceanodroma leucorhoa 

 leucorlioa, including, in addition to those from the locahties men- 

 tioned in the subjoined table of measurements, birds from the 

 Potomac River and from the State of New York, both without date 

 of capture. 



Measurements of specimens of Oceanodroma leucorhoa leucorhoa. 



U.S.N.M. 

 No. 



623871. 



62386 1 . 

 930031. 



930071. 

 752381. 



752421. 



752431. 

 252781. 

 1194 1.. 

 94554 1. 



65428. . 

 192387. 

 211226. 



211225.. 



201457. . 



930041.. 

 1117191. 



1117181. 

 752391.. 



126481.. 

 1118581. 



1117651. 



Sex. 



Male.. 



..do— 

 ..do... 



..do.. 

 ..do.. 



..do.. 



..do. 

 ..do. 

 ..do. 

 ..do. 



..do... 



Male?. 

 Male.. 



..do.. 



...do.... 



Female. 

 ...do.... 



..do.... 

 ..do.... 



Locality. 



..do. 

 ..do. 



...do. 



Grand Menan Is- 

 land, N.B. 



....do 



OfE Nantucket 

 Shoals, Mass. 



do 



Bank Q u e r e a u , 

 North Atlantic 

 Ocean. 



Sable Island Bank, 

 Nova Scotia. 



....do 



Washington, D. C... 

 do 



Fort Chimo, Un- 

 gava, Quebec. 



Attu Island, Alaska. 



Kiska Island, Alaska. 



NearMidway Island, 

 Pacific Ocean, Lat. 

 27° N.; Long. 179° 

 E. 



Near Midway Is- 

 land, Pacific 

 Ocean, Lat. 27° 

 20' N.; Long. 172° 

 45' W. 



Simushir Island, 

 Kuril Islands, Ja- 

 pan. 



on Nantucket 

 Shoals, Mass. 



Bird Rocks, Gulf of 

 St. Lawrence, 

 Quebec. 

 do 



Bank Quereau, 

 North Atlantic 

 Ocean. 



Potomac River 



Off Cape Sable, 

 Nova Scotia. 



Penguin Island, 

 Newfoundland. 



Date. 



Collector. 



July 28,1883 



July 27,1883 

 Sept. 13, 1878 



Sept. 3,1878 



-,1842 



...do 



Aug. 

 ...do 

 July 12,1882 



June 20,1873 

 Sept. 17, 1904 

 Nov. 9,1907 



Nov. 5,19 



June 23, 1904 



July 28,1883 

 July 9,1887 



H.Herrick.. 



.....do 



J. E. Bene- 

 dict. 



do 



R. L. New- 

 comb. 



U. S. Fish 

 Commis- 

 sion. 



do 



...do 



Sept.13,1878 



,185- 



Aug.30,1887 



July 24,1887 



L. M. Turner 



W.H.Dall 

 J. H. Egbert 

 P. Bartsch.. 



....do... 



A. H. Clark. 



J. E. Bene 



diet. 

 W. Palmer.. 



do 156 



R. L. New- 163 

 comb. 



mm. 

 148.1 



157 

 152 



155 

 156 



154.5 87 



84.5 



16.5 

 16 



145 

 151 

 155 

 155 



151 

 153 



155. 



158.5 



149 



148 

 152 



77.5 

 85 

 84.5 

 83 



J. Varden . . . 

 W. Palmer.. 



....do... 



151. 

 155 



16.2 



16.5 

 16.5 

 16 

 16 



16.5 

 15.1 



16.5 



mm. 

 6.8 



87 



87.5 

 86 



158 84 



17.1 

 15 



16.5 

 16 



mm. 

 24.1 



22 

 24.5 



25 



mm. 

 20.8 



20 

 19.5 



24 

 23.3 

 24.8 

 23.5 



25.5 



24 



25.5 



20.2 

 21 

 21 

 20.5 



6.124.5 



24.5 



6.7 



25.8 

 23.5 



23.5 



24.8 



23.5 

 23 



24.5 



19.2 



19 



20.1 



mm. 

 15.5 



22.5 



16 

 18 

 21 

 17.5 



19.5 

 25.1 

 16.6 



18 



20.5 

 19.2 



20 

 20.3 



18.8 

 22 



21.8 



22 



16 

 15.5 



17.5 

 26.5 



20 

 23.5 



17.7 



1 Used in measurement averages on p. 166. 



