438 



APPENDIX. 



APPENDIX IV. 



[LeConte. 



The following bibliography of the memoirs relating to Economic Ento- 

 mology of the Rhynchophora of the United States, has been prepared at 

 my request by Mr. B. Pickinan Mann, of Cambridge, Mass. 



It will be an invaluable addition to this volume, for all who desire to 

 study the habits of these insects : a prerequisite to any rational enquiry 

 into the means to be adopted for the suppression of the noxious species. 

 Such a study has been heretofore almost impracticable in this country, in 

 consequence of the large number of undescribed species, and the scattering 

 of the descriptions of those which have been named in a multitude of vol- 

 umes, many of which can only be obtained with much labor and great cost. 

 For the proper use of the tables, certain explanations are necessary. 



I. The subjects mentioned in the articles cited are indicated as follows : 

 b. benefits. d. description. /. food. 



h. habits. i. injuries. I. localities. 



r. remedies. s. seasons. t. transformations. 



II. The * after a reference indicates that the article is illustrated with a 

 figure of the insect in question. 



