[39] FISHERIES OF THE UNITED STATES. 177 



734. Ta€hybaptesdoBiiiiaici!s(Liim.)- Saint Domingo Grebe. 



[708 a.] Whole of tropical America, including West 

 Indies ; north to Rio Grande Valley, in Texas, and 

 Lower California. 



a. No. 70597. $ ad. Sauta Maria, Texas, March 2, 1876; Dr. J. C. 

 Merrill. 



735. Podilymbus podiceps (Linn.). Thick-billed Grebe. 



[709.] Whole of tropical and temperate America. 



a. No. 88537. $ juv. Wheatland, Indiana, October 19, 1882 ; R. Ridg- 



way. 



b. No. 65554. Pullus. Turtle, Mount Dakota, August 7, 1873 ; Dr. E. 



Coues, U. S. A. 

 (See also Group K of mounted birds.) 



Family COLYMBID^.— The Loons or Divers. 



T3G. Colymbus torqua&us Briinn. Loon. [698.] Northern 

 portions of northern hemisphere ; in America, breed- 

 ing south to northern border of the United States. 



a. No. 68352. Ad. Potomac River, D. C. ; S. Wolf. 



737. Coflymbus adamsi Gray. Great White-billed Loon 



Western Arctic America. 



a. No. 44454. Ad. Fort Resolution, June, 1875 ; J. Lockhart. 



738. Colymbiis arcticais Linn. Black-throated Diver. 



[699.] Northern parts of northern hemisphere. 

 a. No. 76004. Ad. Alaska ; E. W. Nelson. 



739. Colyiiibus pacificus Lawr. Pacific Diver. [700.] 



Pacific coast of North America, breeding far north- 

 ward (chiefly in Alaska). 



a. No. 88978. 9 ad. Point Barrow, Alaska, July 4, 1882 ; M. Smith. 



740. Colyiubii* septentriosaalis Linn. Red-throated 



Diver. [701.] Northern portions of northern hemi- 

 sphere in America, south in winter nearly across 

 the United States. 



a. No. 76007. Ad. Saint, Michael's, Alaska ; E. W. Nelson. 



Family ALCIME.— The Auk Tribe. 



741. Pflaiitiis impennis (Linn.). Great Auk. [710.] Believed 



to be now extinct ; formerly (previous to 1844) in- 

 habiting the islands of the North Atlantic from the 

 New England const (Boston Bay) north to the Arc- 

 tic Circle. 

 2444— Bull. 27 12 



