CONTENTS. 



Introductory note 4 



Comprehensive works most useful for the study of North American insects.. 7 



Bibliography 8 



Systematic works on single orders of insects: 



Hymenoptera 9 



Diptera 18 



Lepidoptera 26 



Coleoptera 36 



Hemiptera 57 



Orthoptera 65 



Neuroptera 71 



Mallophaga 75 



Thysanura 75 



Myriapoda 76 



Arachnida 77 



Works on economic entomology 83 



Works 011 economic entomology published by the U. S. Entomological Com- 

 mission and by the U. S. Department of Agriculture .* . . . 85 



The more important periodicals cited in this bulletin : 91 



How to obtain entomological books and pamphlets 94 



5 



