A SHOET SUMMAEY OF THE CHARACTERS OF INSECTS 

 AND THE ALLIED PESTS TREATED IN 

 THIS A^OLUME. 



The Animal Kingdom is well known to be divided into two groups, 

 the so-called Vertebrata and the Invertebrata. To be more accurate, 

 into what are known as Chordate and Achordate animals.* 



The present volume deals only with the latter. It is hoped 

 at a not far distant date to follow with a second volume of much 

 smaller dimensions dealing with Vertebrate enemies, Animals and 

 Birds. 



The groups of invertebrata of ecoaomic importance to the fruit- 

 grower are the Jointed- Limbed Animals or Arthropoda, the Snails 

 and Slugs or MoUusca, and the Worms or Vermes. The majority 

 of the injurious creatures come in the first group ; the damage done 

 by Slugs and Snails is very limited, and that done by Worms is 

 almost exclusively confined to one family — the Eelworms which 

 attack the strawberry. 



A. The Aethkopoda or Jointed-Limbed Animals can at once 

 be told by the following characters : — 



(1) The body is divided into a number of rings or segments 



running in the longitudinal axis. 



(2) The appendages are composed of a number of joints, both 



those which are ambulatory and those which are sensory. 

 (•') They develop by means of a more or less complicated series 

 of stages, known as the metamorphosis. 



B. The Vermes or Worms can at once be told from the former 

 by the complete absence of jointed appendages in the form of limbs 



* Those who wish to follow this subject of structure and olassification 

 more closely are referred to any modern text-book on zoology or my ' Text- 

 book of Agricultural Zoology,' published by Blackwood & Sons." 8s. 6rf. 



