THE CRICKET 35 



tached ? Hov/ many segments in each leg ? Look on tibia 

 of foreleg, what do you find ? Can the cricket hear ? How 

 many wings ? What are their peculiarities ? 



(3) On the abdomen of all, find stylets or slender pro- 

 jections. The abdomen of the female ends in a long ovi- 

 positor. Pick the ovipositor apart and see if you can find 

 as many parts as were found in the ovipositor of the grass- 

 hopper. 



(4) The chirping sound of the cricket is made by the 

 male, by rubbing the outer wing over the inner. Look for 

 a cross vein with teeth on it on the under surface of the 

 outer wing which rubs on a correspondingly heavy vein on 

 the inner wing. Watch a living specimen to find how this 

 is done. 



jVlake the following drawings : — 



Front of head (X2). 



Inner surface of outer wing showing teeth (X3)- 



Inner surface of front leg showing drum on tibia (X2). 



Dorsal view of female (X2). 



THE MEADOW LOCUST 



Orchelium sp. or Conocephalus sp. 



Where is this animal found? 



Is it more like a grasshopper or a cricket ? 



Has it any characteristic common to both the others ? 



In what does it differ from the others? 



What is its food? During what part of the day does it 

 travel ? 



How do the male and female differ ? Of what use is such 

 a flattened ovipositor? 



