BIRDS AND INSECTS. 323 



3. It has been estimated that should the cotton boll weevil become 

 generally distributed in the south it would cause an annual loss of $225,- 

 000,000. If our total production from the farms of the U. S. amounts 

 to 9 billion dollars annually, what will be the per cent of loss to the 

 U. S. if the Boll Weevil damage reaches the loss of 225 millions annually? 



There are over 50 species of insects that are injurious to 

 stored grains. Ten of these specks are very injurious and for 

 that reason are named in the following list : 



1. The Angoumois grain moth. 6. The granary weevil. 



2. The Mediterranean flour-moth. 7. The rice weevil. 



3. The Indian meal moth. 8. ' The saw-toothed grain weevil. 



4. The meal snout moth. 9. The yellow meal worm. 



5. The confused flour-beetle. 10. The dark meal worm. 



For measures of prevention, you should consult your state 

 Experiment Station. Most of these pests may be eradicated by 

 simple methods. 



The list of injurious insects given is for the purpose of call- 

 ing attention to the insects that should be studied if any time 

 can be given to entomology in the class room. 



Pupils should be required to make a collection of these in- 

 jurious insects that they may be studied at least to the extent 

 that they may be identified in the collection and recognized in their 

 natural places of habitation. 



Equipment. 



1. Two Booklets one on Insect Enemies and one on Insect 

 Friends, upon which to make drawings and reports. 



2. Vivariums, constructed by covering glass jars' or boxes with fine 

 wire netting. Prepare the artificial place as near as possible in con- 

 formity to the natural state of the insect's home. 



3. Alcohol to kill insects and to preserve animals and insects in 

 glass bottles or jars. 



4. Riker mounts for insects. 



5. Frames with glass covers, for keeping butterflies and other in- 

 sects after they have been killed and treated for preservation. 



6. Breeding cages for experiments with insects. Should be so 

 arranged that pupils may observe complete metamorphosis. 



