8o 



THE STUDY OF INSECTS 



flight and do not go far from the banks of the pond or stream in which 

 they were developed. 



Family Cosnagrionid^e 



The members of this family are easily recognized by the shape of 

 their wings, which are long, narrow, and very distinctly petiolate. 



To this family belong the smallest of our damselflies; but while our 

 species are of small or moderate size, there exist in the tropics species 

 that are the largest of the Odonata. Some of our species are dull in 

 color; but many are brilliant, being colored with green, blue, or yellow. 

 This family includes the greater number of our damselflies. 



Cn 2 Cm 



Fig. 129a. — Wings of a dragonfly. 



This is an illustration of the fore and hind wings of a dragonfly, en- 

 larged to show the fine network of veins with the nodus, n, at the middle 

 of the costal margin and the black area near the apex of the wing, known 

 as the stigma. 



