iv CONTENTS. 
Letter. Page. 
L. On Entomological Instruments ; and 
the best Methods of collecting, 
breeding, and preserving Insects . 528 — 559 
LI. Investigation of Insects 560 — 573 
Appendix 575 — 584- 
Authors quoted 585—602 
Explanation of the Plates 603 — 614; 
Indexes 615—683 
