402 



LIFE ON THE EARTH 



an alimentary canal consisting of a mouth, gizzard for 

 grinding food, stomach, and intestines. 



Near the head is a little nerve center. The whole an- 

 imal may be regarded as built up by the joining of a number 

 of essentially similar segments. A more minute examina- 

 tion will show that 

 these segments have 

 been materially 

 modified in some 

 portions of the ani- 

 mal, but they have 

 not been in any re- 

 spect organized, as 

 have the different 

 parts of higher ani- 

 mals. This simple 

 animal, as has al- 

 ready been seen, is 

 an untiring worker in 

 preparing and ferti- 

 lizing soil for plants, 

 and thus is a most 

 efficient helper to 

 man. 



Insects. Experi- 

 ment 133. Procure a 



grasshopper or honey-bee, as a type insect, and inclose it in a small, 

 glass-covered box. Into how many parts is the body divided? 

 Describe these parts. To which part are the legs attached? The 

 wings? How many legs are there? How many wings? Notice 

 the largest part into which the body is divided. Notice the eyes 

 and the feelers, or antennae, on the head. Write a short descrip- 

 tion of the general characteristics of the bee's body. 



BUTTERFLY ON ALFALFA 



