INTERDUNAL PONDS AND TAMARACK SWAMPS 185 



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 FIG. 210. Nymph and adult of 



large also, meeting dorsally for some dra s n fl y> Leucorhinia intacta. 



... After Shelf ord. 

 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. 



FIG. 211. Dragon fly, Libellula pulchella. 

 Needham. 



After 



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. 



