INSECTS 



INJURIOUS TO VEGETATION 



INTRODUCTION. 



Insect defixed. — Buaix and Nerves. — AiR-nrES and BREATiiiNa-iioLES. — 

 Heart and Blood. — Insects are produced eeom Eggs. — Metamorphoses, 

 OR Transformations. — Examples of Complete Transformation. — Partial 

 Transformation. — Larva, or Infant State. — Pupa, or Intermediate 

 State. — Adult, or "Winged State. — Head, Eyes, Antennae, and Mouth. 

 — Thorax or Chest, Wings, and Legs. — Abdomen or Hind-body, Piercer, 

 and Sting. — Number or Insects compared -with Plants. — Classification. 

 Orders. Coleoptera. Orthoptera. Hemiptera. Neuroptera. Lepido- 

 ptera. Hymenoptera. Diptera. Other Orders and Groups. — Remarks 

 ON Scientific Names. 



The benefits which we derive from insect?, though neitlier few 

 in number nor inconsiderable in amount, are, if we except 

 those of the silk-worm, the bee, and the cochenille, not very 

 obvious, and are almost entirely beyond our influence. On the 

 contrary, the injuries that we suffer from them are becoming 

 yearly more apparent, and are more or less within our control. 

 A familiar acquaintance with our insect enemies and friends, 

 in all their forms and disguises, will afford us much help in the 

 discovery and proper application of the remedies for the depre- 

 dations of the former, and will tend to remove the repugnance 

 wherewith the latter are commonly regarded. 



Destructive insects have their appointed tasks, and arc lim- 

 ited in the performance of them ; they are exposed to many 

 accidents through the influence of the elements, and they fall 

 a prey to numerous animals, many of them also of the insect 

 race, which, while they fulfil their own part in the economy of 

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