X 
INTRODUCTION. 
Morgan, C. L. : 
Animal Sketches. Illustrated. 
Needham, James G. : 
Outdoor Studies. Illustrated. 
Nehrling, Henry: 
Native Birds of Song and Beauty. Illustrated, two 
volumes. 
Oswald, Felix L. : 
Zoological Sketches. Illustrated. 
Packard, A. S.: 
A Guide to the Study of Insects. Illustrated. 
Parkhurst, H. E.: 
The Birds’ Calendar. Illustrated. 
Porter, J. Hampden: 
Wild Beasts. Illustrated. 
Russ, Karl: 
The Speaking Parrots. Illustrated. 
Scudder, Samuel H. : 
The Life of a Butterfly. Illustrated. 
Butterflies: Structure, Changes, and Life-histories. 
Semper, Frank W. : 
Injurious Insects, and Use of Insecticides. Illustrated. 
Shaler, Nathaniel S. : 
Domesticated Animals. Illustrated. 
Simmonds, P. L. : 
Commercial Products of the Sea. Illustrated. 
Stokes, A. C. : 
Microscope for Beginners. 
Thomson, William: 
Great Cats I Have Known. Illustrated. 
Thompson, Ernest Seton: 
Wild Animals I Have Known. Illustrated. 
Torrey, Bradford : 
Birds in the Bush. 
Wallace, Alfred Russell: 
Darwinism. Illustrated. 
Weed, Clarence Moore: 
Life-histories of American Insects. Illustrated. 
