THE DON AT A 



69 



held almost vertically above the body (Fig. 39). These insects are often 

 called damsel-flies. In the other group the body is stouter and propor- 



FIG. 39. Damsel-fly (Lestes uncata Kirby) showing position of wings when at rest. (After 

 Needham, N. Y. State Mus. Bull. 68.) 



FIG. 40. Dragon-fly (Anax junius Dru.)- Natural size. (Original.') 



tionally shorter, and the wings when at rest extend out horizontally at 

 the sides of the body (Fig. 40). 



