iv PREFACE TO PART I. 



it of Cornell University. That these collections are in a suffi- 

 Ljood condition for this purpose is due very largely to the 

 generous aj- f many Entom Specific acknowh 



ments uill be made later. 



As the completion of the work has been delayed by other duties. 

 it has seemed best to issue this pa.rt at this time. Other chap' 

 will be published as soon as practicable. In addition to the system- 



part, the scope of which can be inferred from that given h 

 there are to be chapters on the Means of Destroying Insects or of 

 Preventing their Ravages, the Collection and Preservation of Ento- 

 mological Specimens, Entomological Supplies, a Classified List of 

 Entomological Works, a Glossary, and an Introductory Chap 



JOHN 11 I:\KV COMSTOCK, 



MOLOGICAI. LABORATORY, CORNKI.I. UNIVERSITY, 

 September, 1888. 



