PREFACE. 



been obtained from the publishers of Farm and Fire- 

 vide. The following have been drawn under the 

 author's supervision, by Miss Freda Detmers: Plates 

 I, II, III, V, VI, VII, and Figs. 3, 8, 12, 12| (p. 38), 

 24, 25, 31, 40, 44-47, 74-80, 82, 83 (p. 157), 85, 86, 

 926, 1)3-97, 107, 108, 115, 120,121,124,129,132. 



All the figures are natural size unless otherwise 

 stated, and wherever a straight line occurs beside a 

 magnified drawing, it represents the length of the 

 specimen figured. 



A small edition of the first three parts of this 

 work was published in connection with the Report 

 of the Columbus, (Ohio) Horticultural Society for 

 1890. 



I have attempted to make the discussions of life- 

 histories and remedies as plain and simple as possi- 

 ble, omitting, so far as practicable, all technical terms, 

 and have included only such details as are nec- 

 essary to a practical understanding of the subjects 

 treated of. In several cases where the scientific des- 

 ignations of species have been lately changed, the 

 old form has been retained, because articles concern- 

 ing the insect can thus more easily be found in the 



literature of economic entomology. 



C. M. W. 



Hanover, New Hampshire, April, 1891. 



