JUNE-BUG " (BEETLE) : LABORATORY WORK. 



How does the size of the head compare with that of the 

 grasshopper ? Can you find both ocelli and compound 

 eyes ? Notice the antennse on the front of the head. 

 Draw one. What changes would you need to make in the 

 antenna of a grasshopper to make it like that of the June- 

 bug? Can you find labrum, mandibles, maxilla, and 

 labium as in the grasshopper ? 



How many pairs of walking-legs do you find ? Do you 

 find segments to correspond ? What name must be given 

 to the large segment just back of the head ? Examine a 

 leg : Do you find in it the same segments that occur in the 

 leg of the grasshopper ? 



Lift one of the hard outer wings (elytra). Do you find 

 veins, like those of the grasshopper, in the elytron ? Is 

 there a second pair of wings ? Are they as long as the 

 elytra ? How are they folded ? 



Study the abdomen. Can you find the membranous 

 portion uniting dorsal and ventral halves of the somites ? 

 Are spiracles present ? Can you find any * ( ears " ? How 

 many segments can you count in the abdomen ? Do you 

 find anal cerci, or ovipositor? Separate the flaps at the 

 hinder end of the abdomen. Can you find any additional 

 segments ? Draw a beetle from above with elytra and 

 wings extended, 



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