160 



Rissa tridactylcij Bon. Coast in autumn and winter ; com- 

 mon. 



Sterna hirundo* Linn. (S. Wilsoni, Bon.) Coast in sum- 

 mer ; common ; breeds abundantly in some localities. 



S. macroura, Naum. Common on the coast in summer ; 

 breeds abundantly on some islands. 



Thalasseus caspius, Boie. Coast in winter ; rare. 



Hydrochelidon Jissipas, Gray. (H. plumbea, Lawr.) Coast 

 in autumn ; not common. 



Colymius septentrionalis, Linn. Coast in winter ; common. 



Podiceps Holbollij Reinh. (P. griseigena Auth.) Coast in 

 winter ; common. 



P. cristate s, Lath. Summer visitant ; breeds about lakes 

 near Calais. G. A. Board man. 



Utarnania for da, Leach. Fall and winter on the coast ; com- 

 mon ; a few breed about the Bay of Fundy. 



Mormon arctica, 111. Resident on the coast ; common ; a 

 few breed on the islands about Grand Men an. 



M. cirrhata, Pall. Winter ; rare. 



M. glacialis, Leach. Grand Menan. Audubon. Very rare. 



Uria grylle, Lath. Resident on the coast; abundant; 

 breeds on rocky islands from Mount Desert eastward. 



Catarractes troille, Bryant. Fall and winter on the coast ; 

 common ; a few breed about the Bay of Fundy. 



C. ringvia, Bryant. Fall and winter ; common. 



C. lomvia, Bryant. Fall and winter ; rare. 



Mergulus alle, Yieill. Winter ; common. 



MR. S. H. SCUDDER, of the Zoological School at Cambridge, 

 being called upon, stated that he had been examining the 

 collection of butterflies in the Museum of the Institute, a few 

 of which he had brought in for examination. The collection 

 was a valuable one, the specimens mostly Brazilian. He 

 entered into some details of the structure of the wings of 

 butterflies, and explained how the special arrangement and 

 direction of the nervures afforded good characteristics in 

 assisting the Naturalist to determine the affinities of these 



*For a very complete revision of the Terns of North America, see A Review of 

 the Terns of N .A. b}- Elliott Coues. Proc. Acad. Nat. Sc. of Phil. Dec. 1862, 

 p. 535. 



