PREFACE. XXIU 



Variety. Investigation of insects. Seasons in 

 which they appear. Instruments and mode of 

 taking and preserving them, — with other particu- 

 lars which it is not necessary here to enumerate. 



The List of Authors quoted in this work will 

 he found in the last volume. It was intended to 

 have given with this all the plates illustrative of 

 the orders, but only three could be finished in 

 time : the remainder will appear in the second 

 volume, and those which relate to the anatomy 

 and definitions in the third. 



