FORMS OF INSECTS 



27 



Youngkrya Qcoon 



Lepidoptera — stages in the development 

 of the silk moth. 



them is often inconspicuous. These insects may be seen to take 

 Hquid food through a long tubehke organ, called the prohos'cis, 

 which they keep rolled 

 up under the head when 

 not in use. During de- 

 velopment the young pass 

 through a stage in which 

 they are known as cater- 

 pillars or larvce and feed 

 on plants by means of a 

 pair of hard jaws. 



Grasshoppers, found almost everywhere, and crickets, black 

 grasshopper-like insects often found under stones, belong to the 

 order Orthop'tera (straight wings). Members of this group may- 



usually be distinguished by their 

 strong, jumping hind legs, by their 

 chewing or biting mouth parts, and 

 by the fact that the hind wings are 

 folded up under the somewhat 

 stiffer front wings. 



Another group of insects some- 

 times found on flowers in the fall 

 are flies. They belong to the order 

 Dij^'tera (two wings). These in- 

 sects are usually rather small and 

 have a single pair of gauzy wings. 

 Flies are of much importance to 

 man because certain of their 

 number are disease carriers. 



Bugs, members of the order 

 Hemip'tera (half wings), have a 

 jointed proboscis 

 which is used for 

 piercing and sucking. 

 They are usually 

 small and may or may not have wings. 



The beetles or Coleop'tera (sheath wings), often jj^^. 

 mistaken for bugs by the uninformed, have two bedbug. 



Orthoptera — 1, cricket; 2, cock- 

 roach ; 3, grasshopper. 



