CONTENTS. 



rage. 



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 on economic entomology published by the XL S. Entomological Com- 

 mission and by the IT. S. Department of Agriculture 85 



The more important periodicals cited in this bulletin 91 



How to obtain entomological books and pamphlets 94 



5 



