THE (JRASSIIOPPER. 



Microscopic Objects. 



19 



THE COMPiJUNU EYE. 



CROP OF GRASSHOPPER. 



If tlie crop of a grasshopper 

 be split open, it will be seen to 

 be composed of two layers. 

 The inner layer has many 

 sliarp-pointeil teeth upon its 

 surface, arranged in rows or 

 groups. The teeth aid in tear- 

 ing the food to pieces. 



When viewed with a mi- 

 croscope, the surface of a 

 compound eye is seen to be 

 marked off into little spaces 

 called facets. These facets 

 are six sided, crowded 

 closely together, and each 

 eye contains from six to ten 

 thousand facets. Each fac- 

 et seems in some way to 

 represent a simple e3'e. 



EGGS OF GRASSHC'PPER. 



Each egg is seeu to be en- 

 closed in a sac. the mouth of 

 wdiicli opens into the oviduct. 

 In the smaller end or tij) of 

 the sac will be found two 

 or three immature eggs in 

 various stages of develop- 

 inent, 



