AN INSECT. 11 



Thus there are three distinct stages in Complete 

 or Abrupt Metamorphosis: (a) larva, (b) pupa, 

 (c) Adult. 



Incomplete Metamorphosis. (Plate 2, Fig. 3). 

 In this case the larva hatches from the egg with a 

 form very similar to the parents, only that all the 

 organs and some parts are not fully grown or de- 

 veloped ; also no wings are present. However, in 

 the later phases of development wing pads appear: 

 it is now called a Nymph, though some authors 

 use the term "Nymph" for the whole larvae stage: 

 finally the wings and all the organs are properly 

 developed and the insect is an adult; e,i\: grass- 

 hoppers, crickets, etc. 



Classification of Insects. 



The great class Insecta is divided usually into 

 9 large Orders, -but some writers subdivide some of 

 these, making more orders. The orders are divided 

 into Families, and in these families are included 

 Genera, a kind of "surname," while Genera are 

 again subdivided into species and the latter is a 

 kind of "christian" name. 



For example : The Hawk Moth Protoparce 

 Coiivohiili can thus be classified: — 



(i) Class. Insecta. 

 (2) Order: Lepidoptera. 



(3) Family: Sphingidse. 



(4) Genus Protoparce. 



(5) Species: Convohuli. 



Orders and families can be divided again into 



