INTERDUNAL PONDS AND TAMARACK SWAMPS 187 



FIG. 21 26. Aquatic insects and nymphs. After Alice, a, adult mosquito, 

 b, its larva; c, its pupa; d, water skater; e, marsh strider; /, whirligig beetle; 

 g, water scorpion; h, water boatman; i, back swimmer. 



