PARTS OF AN INSECT. 



63 



one side of the body pinned in the way described. "When 

 the insect becomes perfectly dry the wings will remain in 

 the position in which they were pinned. 



A common beetle for study should be prepared in the same 

 way. 



In the beetle the front-wings are very hard and are 

 closed tightly over the hind-wings. With a pin, or the 

 blade of a knife, the upper or front wings may be opened, 

 and beneath these will be seen the hind-wings, not folded 

 like a fan as in the grasshopper, but folded or bent in the 

 middle, as the arm is bent at the elbow. 



FIG. 65. A BEETLE WITH THE ELYTRON AND HIND-WING OF THE EIGHT SIDE OPEN, AND THE 

 ELYTRON OF THE LEFT SIDE OPEN WITH THE LEFT HIND -WING FOLDED IN ITS NATURAL 

 POSITION WHEN CLOSED. 



61. The abdomen has no wings or legs, but is plainly 

 marked with lines running across the abdomen transversely. 



FIG. 66. ABDOMEN OF A DRAGON-FLY, SHOWING RINGS OR SEGMENTS. 



