PRE FA CE 



References to the bibliography are made in the text by citing the 

 name of the author and the year in which the paper quoted was 

 pubHshed. 



The wood cuts used in the text were engraved from nature by 

 Mrs. Anna B. Comstock for our joint work, "A Manual for the Study 

 of Insects." The other original figures and the copies of published 

 figures were drawn by Miss Anna C. Stryke, Miss Ellen Edmonson, 

 Miss Mary Mekeel, Mr. Albert Force, Mrs. Louise Nash, and Miss 

 E. L. Keyes. I am deeply indebted to each of these artists for the 

 painstaking care shown in their work. 



As an aid to the pronunciation of the technical terms used and 

 of the Latin names of insects, the accented syllable is marked with a 

 sign indicating the quality of the vowel according to the English sys- 

 tem of pronouncing Latin. 



Two objects have been kept constantly in mind in the preparation 

 of this book: first, to aid the student in laying a firm foundation for 

 his entomological studies; and second, to make available, so far as 

 possible in the limited space of a handbook, a knowledge of the varied 

 phenomena of the insect world. It is hoped that those who use this 

 book will find delight in acquiring a more intimate acquaintance with 

 these phenomena. 



John Henry Comstock 

 Entomological Department 



Cornell University 

 August IQ24. 



