exchanges of the Institution, and in supplying other cabinets, 

 no fear need be entertained of sending more than enough for the 

 purposes in view. 



The eggs, of which a single set only need be collected for the 

 present, are chiefly those of the eastern bluebird (Sialia sialis), 

 the robin {Turdus migratorius), the cat-bird (Ifitnus carolinen- 

 sis), the red-winged blackbird {Agelaius phoenicevs), and the 

 crow blackbird {Quiscalus versicolor). Those to which particu- 

 lar attention should be paid as groups, are the eagles, hawks, 

 owls, woodpeckers, small waders, ducks, &c., of all portions of 

 the country ; but, as stated, all kinds of eggs, and particularly 

 those from the regions west of the Mississippi, and- from the 

 northern parts of America, are desired. A subjoined list em- 

 braces the species more particularly desired by the Institution ; 

 especially those having an asterisk prefixed, which are, with 

 few exceptions, entirely unknown to science. The numbers in 

 the list refer to a printed catalogue of North American birds, 

 published by the Institution, which will be sent to any one who 

 proposes to collect eggs for its museum. 



The attention of collectors and correspondents is particularly 

 invited to eggs of the following easily identified and well-known 

 birds: The California condor or vulture (Cathartes California- 

 nus), and the golden or ring-tailed eagle (Aquila canadensis) ; 

 the swallow-tailed hawk {Nauclerus furcatus), the black-shoul- 

 dered hawk {Elanus leucurus), and the Mississippi kite {Ictinia 

 plumbea), of the Southern States ; the duck hawks {Falco 

 anatiim, etc.), and the speckled partridge hawk {F. candicans), 

 of the North. All the black and other Rocky Mountain hawks ; 

 all the owls, especially those breeding in the North, as also the 

 burrowing owls of the West ; the ivory-billed woodpecker 

 {Ficus principalis), the red-shafted flicker of the West (Coloptes 

 wea;/c<:Hz?/s), the Rocky Mountain bluebird (Sialia arctica) ; all 

 the warblers ; the Bohemian wax-wing (Ampelis gnrruhis), the 

 violet green swallow {Hirundo thalassina) ; the black swifts or 

 swallows of the Rocky Mountains and the Northwest ; the Rocky 

 Mountain wrens and nuthatches ; the Canada, Steller's and 

 Rocky Mountain jays generally, including the Piuolero ; the 

 band-tailed pigeon of the Rocky Mountains and West {Columba 

 fasciata) ; the New Mexican and Rocky Mountain wild turkey 

 {Meleagris mexicana) ; the dusky or black mountain grouse 



