Books for Entomologists and Ornithologists 



Our Insect Friends and Enemies 



THE RELATION OF INSECTS TO MAN, TO OTHER 

 ANIMALS, TO ONE ANOTHER, AND TO PLANTS 



With a Chapter on 



THE WAR AGAINST INSECTS 



By John B. Smith, Sc. D. 



Professor of Entomology in Rutgers College; Entomologist to the New Jersey 

 Agricultural Experiment Stations: New Jersey State Entomologist, etc. 



The importance of insects ani their influence on human life are just 

 coming to be appreciated, an i this book gives an account of the manner and 

 extent of this influence. It Slows how diseases of man are carried by them, 

 and their own subjection to epidemic p'agues, and discusses parasitism on the 

 higher auimals and the curious modifications of life and development imposed 

 by this habit. 



It further shows that the most effective checks to insect increase are 

 among- their own kind, and how primary, secondary, and even tertiary para- 

 sites battle for supremacy, each contri outing its own share to the maintenance 

 of the balance of nature. 



With a colored frontispiece and 121 line cuts in the text. 



Large 12mo. 314 Pages. Cloth, $1.50 net. 



Ready in September— A New Popular priced Edition 



A MANUAL OF NORTH AMERICAN BIRDS 



BY ROBERT RIDGWAY 



Curator Department of Birds. U. S. National Museum 



This valuable manual contains concise descriptions of every species of 

 bird known in North America, and of many allied s-peeies in Mexico and Central 

 America. It is one of the most important, thorough, and original contribu- 

 tions to the literature of the subject which has been prepared, and natura ists 

 will tied it an invaluable aid. 



With 464 outline cuts. 800 pages. Royal 8vo. Cloth, $5.00 net. 



Second Revised Edition 



Economic Entomology 

 By John B. Smith, Sc. D. 



This took tells all about the more 

 generally injurious insects, and the 

 best methods of dealing with them. 

 The work is indispensable to the 

 farmer and fruit-grower. 



Profuselv illustrated 475 page s 

 Cr wn 8vo. Cloth, $2.5J net. 



Second Revised Edition 



Insects Injurious to Fruits 



By William Saunders, F. R C. S. 



A concise and comprehensive vol- 

 ume, containing all the impcrtant 

 facts re'ating to insects known to 

 be injurious to fruits in all parts of 

 the United States and Canada. 



445 illustrations 436 pages. 

 Crown 8vo. Clovh, $2.00 net. 



BIRDS IN THEIR RELATION TO MAN 



By C. M. Weed and N. Dearborn 



The authors' knowledge of insect life, both as affecting the diet of birds 

 and as injuring vegetation, will help many to understand the circle of relations 

 in the two worlds -animal and vegetable. 



Lav shly illustrated. Octavo. Cloth, $2. 50 net. 

 Tor Free Descriptive Circulars Send to 



J. P. LIPPINC0TT COMPANY, Publishers, Philadelphia 



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