INTERDUNAL PONDS AND TAMARACK SWAMPS 185 



FIG. 210. Nymph and adult of 



black, unspotted or nearly so. It is our commonest bullhead. 



The mud minnow (Fig. 190) is also present. Many damsel- and 



dragon-fly nymphs are present in the marginal zone, and the 



adults are found hovering over the 



sedges and grasses. Those of Libel- 



lula pulchella, Gomphus spicatus (Fig. 



189), Leucorhini intacta, and Anax 



junius occur in the rush and cat- 



tail area. 



The nymph of Anax (Fig. 209) 



has very large eyes that occupy two- 



thirds of the side margin of the head. 



The adult dragon fly appears early 



in spring, and flies late (late March 



to mid-October). 



The eyes of the adult are very 



large also, meeting dorsally for some 



distance. The insect is good sized, 



the abdomen some 2 inches long. The color is green, marked 



with brown and blue (male). The front of the face bears a dark 



spot surrounded by 

 yellow that in turn 

 is encircled with a 

 blue ring. 



The nymph of 

 L. intacta (Fig. 210) 

 is mud-colored, flat, 

 and the abdomen 

 terminates abruptly. 

 This is a small spe- 

 cies, the adult hav- 



ing a wing-spread of about 2 inches. The body is black. The 



upper part of the face is ivory white, obscured with yellow in 



the female. It is commonly known as the white-faced dragon 



fly. It flies in May and June. 



FIG. 211. Dragon fly, Libellula pulchella. 

 Needham. 



After 



