108 INSECTA 



3. The Abdomen. 



(1) Shape? 



(2) Number of segments or somites? 



(3) Any appendages of the abdomen, as the ovipositor, 



sting, or some other appendages peculiar to this 

 order? 



(4) Any other ordinal peculiarity? 



4. Metamorphosis. 



(1) Complete or incomplete? 



(2) Larval stage called what? 



5. Odor. Any distinctive odor? 



6. This insect has the following ordinal characteristics: 

 (Name those you have discovered — see text for ordinal charac- 

 teristics.) Hence, it belongs to Order 



See descriptive zoologies for the Orders of Insects. 



COMPARATIVE SYSTEMATIC STUDY 



(See page 110.) 



For this study the teacher should select a dozen or more differ- 

 ent insects representing a number of orders, but he should have 

 several insects belonging to each order represented, such as 

 grasshoppers, crickets, and walking-sticks; butterflies and 

 moths; giant water-bugs, chinch-bugs, and cicadas; fire-flies, 

 June-bugs, and lady-beetles; wasps, honey-bees, and bumble- 

 bees. 



Let the student write a brief description of each insect, 

 placing each characteristic in the column designated on 

 page 110. 



When this is completed, check thus (*) all the points in the 

 description which are the same for all insects, and compare 

 them with the class characteristics given in the text or in some 

 good work on insects. 



Check thus ( t) all points which agree for several insects, and 

 thus (t) those which are alike for several others, and thus (x) 

 for those of others. 



Compare those points in which all the insects in each small 

 group agree with the ordinal characteristics given in some work 

 on insects, or in the text, for the orders represented. 



