BY EDGAR A. MEARXS. 87 



$ ad. ad., Hudson River at Cornwall, November 17, 1877, E. A. M. : 

 length, 14-61; stretch, 33-33; wing, 10-18; tail, 4-30; culmen, 1-22; 

 gape, 1-89; tarsus, 1-32; middle toe and claw, 1-44; hallex, -18; claw, 

 •12. 



202. Sterna fluviatilis, Naum. Common Tern; Sea Swal- 

 low. Only once observed, — on Nov. 15, 1874. 



203. Sterna fuliginosa, Gmelin. Sooty Tern. On Sep- 

 tember 14, 1878, I saw one of these beautiful birds near West Point, 

 from the deck of a little steam yacht. It flew quite near, and I wished 

 for a gun to secure so rare a prize. To my great delight, however, a 

 beautiful specimen was presented to me by Miss Anna B. Warner. It 

 was killed by flying against the boathouse on Constitution Island, on 

 the day previous to that on which I saw my bird. 



Dimensions. — Measurements of No. 1772, $ ad., Constitution Isl- 

 and, Hudson River, N. Y., September 13, 1878, E. A. M. : length, 

 17-50; stretch, 34-70; wing, 11-00; tail, 6-00. 



204. Hydro chelidon lariformis, Gmelin. Black Tern. The 

 late Frederick S. Osborn shot three of these Terns in the autumn of 

 1874, near Garrisons, on the Hudson. I have seen one of the speci- 

 mens in his collection; he also informed me that they were shot from 

 a flock of about fifty birds. Mr. Thomas W. Wilson saw two Terns 

 which were supposed to be of this species, about September 11, 

 1879, near Cold Spring. 



Family, PODICIPID^. 



205. Podiceps holbdlli, Bernhardt. American Riid-neckkd 

 Grebe. Quite abundant, at times, in autumn, winter and spring. 



Dimensions. — Average measurements of two males: length, 21-55 ; 

 stretch, 34-58; wing, 7-30; length from tip of bill to end of toes, 

 20-75; culmen, 20G; tarsus, 2-61; middle toe and claw, 3-00. 



206. Dytes auritns, Linne. Horxed Grebe. A very com- 

 mon spring and fall migrant; occasional in winter. 



Dimensions. — Average measurements of four adults : length, 14-30; 

 stretch, 24-38; wing, 5-40; tail, 1-55; culmen, -91; gape, 1-32; tarsus, 

 1-85; middle toe and claw, 2 00; middle toe alone, 1-70; its claw, 

 •31. 



207. Podilymbus podiceps, Linn!-. Pied-bill Grebe; Dab- 

 CHICK. Abundant during migrations ; occasional in summer; doubt- 

 less breeds. 



Dimensions. — Average measurements of four specimens : length, 

 13-65; stretch, 22-fiO; wing, 4-95; tail, 1-55; culmen, -86; bill from 

 nostril, -55; gape, 1-38; tarsus, 1-04; middle toe and claw, 2 30; mid- 

 dle toe alone, 2 00. 



