Books for Entomologists and Ornithologists 



Our Insect Friends and Enemies 



THE RELATION OP 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 Entomoloiji/ in Rutgers Colleue; Entomologist to the Xeia Jerse}/ 

 Agricultural Experiment Stations; Xeiv Jersey State Entomologist, etc. 



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

 corain/ to be appreciated, an 1 this book (fives an account of the manner and 

 extent of this influence. It slows how disea^fes of man are carried hy them, 

 and their own subjectioa to epidemic p'ag-ues, and discusses parasitism on the 

 higher animals 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 tlie text. 

 Large l2mo. 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. JJ. S. National Museum 



This valuable manual contains concise descriptions of every species of 

 bird known in N'orth America, and of many allied species 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 fled 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, ?c. 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. 



Profusely illustrated 475 pages 

 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 important 

 facts relating to insects known to 

 be injurious to fruits in all parts of 

 the United States and Canada. 



445 illustrations 436 pae^es. 

 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. 



I.avshly illustrated. Octavo. Cloth. $2.50 net. 



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J. P. LIPPINCOTT COMPANY, Publishers, Philadelphia 



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