ORNTTHOLOGICAL EXPLORATIONS. '2l3 



Baliceetus leuc^cqjliahis (Linn.) in spite of tlie white ' thiglis,' which 

 perhaps is only a lapsus calami of the person copying the original 

 manuscript, this being, as we know, only a rough draft of Steller's, in 

 Common with the ' black feet.' The following are my special reasons : 

 1. The habitat given by Steller agrees exactly with that of J?, leucoce- 

 phahis, while T. pelagicus is common in Kamtschatka, and does not oc- 

 cur at all in America ; 2. ' White head ' can only be said about leucoce- 

 phalus and not o( pelagicus, which has merely the forehead white ; 3. If 

 Steller had intended to describe the peJagicus he would not have over- 

 looked the white shoulders, a much more conspicuous feature than the 

 white forehead ; 4. Even if Steller's manuscript contained the words 

 ' thighs white ' it would be of little importance, as it seems that he 

 did not kill the bird and only made the description from the living 

 animal. In pelagicus the whole abdomen is white. The supposition 

 here advanced seems the more plausible, as a pair certainly belonging 

 to this species still breeds in the neighborhood of the place where 

 Steller and his comrades wintered." (Proc. U. S. Nat. Mus., VI, 1883, 



p. 66.) 



95. Haliaeetus hypoleucus Eidgway. 



IbS'S.—HalUoeetus sp. Stejneger, Pr. U. S. Nat. Mus., 1883, p. G7. 



1883.- HaUioeetus hypoleucus "Stejueger MSS.," Eidgw., Pr. U. S. Nat.Mns., 1883, p. 



90.— Stejneger, Naturen, 1884, p. 8. 

 1884. — Haliactus alhicilJa subsp. hypoleucus? Gurnet, List Diuru. B. Prey, p. 58. 



The type specimen of the present species is still unique, and its status 

 consequently somewhat doubtful. But, before i)roceeding to discuss it, 

 the original description by Mr. R. Eidgway may be advantageously re- 

 printed as follows : 



" Young $ (No. 89127, collector's No. 1055, Bering Island, May 15, 

 1882). Ground color of pileum, nape, upper back, rump, with lesser 

 and middle wing-coverts dirty white, spotted with grayish brown, the 

 spots of the latter color being chiefly subterminal, but often occupying 

 the tips of the feathers ; upper part of rump with white largely pre- 

 dominating; greater wing- coverts and longer scapulars uniform dusky, 

 bordered terminally with mottled dirty grayish white; tertials uniform 

 slafe-dusky ; upper tail-coverts mottled dusky terminally, mottled white 

 basally; remiges uniform brownish black; rectrices blackish dusky, the 

 inner webs much mottled with pale grayish and bufi'y white. Side of 

 head with a broad and distinct stripe of nearly uniform brown, occupy- 

 ing the entire orbital and auricular regions. Entire lower parts white, 

 all the feathers with distinct duskv shafts: those of lliroat streaked 



