

GUIDE 



THE STUDY OF INSECTS, 



AND A TREATISE ON THOSE 



INJUKIOUS AND BENEFICIAL TO OEOPS 



FOR THE USE OF 



COLLEGES, FARM-SCHOOLS, AND AGRICULTURISTS. 



A. S! PACKARD, Jr., M.D. 



WITH FIFTEEN PLATES AND SIX HUNDRED AND SEVENTY WOOD-CUTS. 



FOURTH EDITION. 



SALEM : 

 NATUEALISTS' AGENCY 



BOSTON : ESTES & LAURIAT. 

 18 74. 



