INTRODUCTORY STUDIES OF LIVING ANIMALS 7 



2. Just what do they do when you try to catch them ? 

 What structures enable them to do these things ? 



3. Of the three pairs of legs, which extend sidewise for 

 running or grasping, and which backward for jumping or 

 climbing ? What structures have the legs to enable them 

 to do their work properly ? 



4. Notice how well developed the cricket's wings are, 

 and state how much they are used or how they influence 

 the habits of the animal. 



5. How many projecting spines are there on the hinder 

 end of the body ? Are they ornamental or useful ? how ? 

 The female crickets have a special spear-shaped spine for 

 depositing eggs. 



6. In a column make a list of the senses (sight, feeling, 

 etc.), and opposite each state what kind of an organ is used 

 and where it is located. The ears are oblong white spots 

 on the second long piece of the front legs. 



7. Find out whether the cricket chews solid food or 

 sucks liquid food, and whether it has biting jaws or protru- 

 sible lips. See whether it will attack a toothpick or your 

 finger, and if the crickets have been confined long, whether 

 there has been any attempt at cannabalism. Is its natural 

 food animal or vegetable matter ? 



8. How do crickets chirp ? 



9. What work do they do in nature ? 

 10. How does a baby cricket develop ? 



THE LIVING GRASSHOPPER OR LOCUST 



Materials. 



Individual specimens in wide-mouth bottles or jars, and 

 other specimens in cages, with turf or foliage for food and 

 concealment. Simple lenses. 



