I" 



LESSONS |\ \<,KI< n/ITKK 



6. How many segments in the abdomen? Com- 

 pare the upper and lower surfaces. 



7. How do beetles live? Find as many different 

 kinds as you can. 



8. Life history. The beetle has all the four stages: 

 egg, larva, pupa, and adult. The eggs of the beetle 



hatch into grubs, wire 

 worms, borers, etc. In this 

 stage they do great damage 

 to the crops, trees, and other 

 vegetation. From the grub 

 stage they pass into a pupa 

 stage similar to all other in- 

 sects. The pupas are usually 

 in the ground, from which 

 emerge adult beetles. 



Most of the beetles are 

 very injurious insects, the tiger beetles and lady beetles 

 excepted, and, since they are usually chewing insects, 

 the treatment is a lead arsenate or paris green spray. 



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 Insects 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. 



a. Larva, b. Adult. 

 Fia. 15. GROUND BEETLE 



