82 ELEMENTARY AGRICULTURE 



Beetles have thick heavy wing covers. Examine in- 

 sects and note the number and kind of wings on each 

 species. 



4. All insects have antennae or "feelers." In your 

 study of insects compare their antennae. Are they 

 long or short? smooth or feathered? Of what use 

 are the antennas? 



5. Study the mouth parts of different insects and 

 try to determine the different ways in which they get 

 their food. The butterfly and the grasshopper are 

 good examples. 



6. Make a little cage and put into it a live cater- 

 pillar with plenty of green leaves of the kind on which 

 it feeds. Watch it spin its cocoon and go into the rest- 

 ing stage. Keep it where you can observe what hap- 

 pens later. In the spring collect cocoons, put them 

 into your cage and wait for the moths or butterflies 

 to come out. 



Free Bulletins, U. S. Dept. of Agriculture. 



No. 38. Spraying for Fruit Diseases. 



No. 45. Some Insects Injurious to Stored Grain. 



No. 75. The Grain Smuts : Cause and Prevention. 



No. 91. Potato Diseases and Their Treatment. 



No. 99. Three Insect Enemies of Shade Trees. 



No. 127. Important Insecticides. 



No. 132. The Principal Insect Enemies of Wheat. 



No. 146. Insecticides and Fungicides. 



No. 171. The Control of the Codling Moth. 



No. 172. Scale Insects and Mites on Citrus Trees. 



No. 196. The Usefulness of the Toad. 



No. 212. The Cotton Bollworm. 



