136 DRAGONFLIES OF NORTH AMERICA 
The nymphs are climbers among the submerged, standing aquatic 
plants in still shallow waters, where they await almost motionless 
the coming of their prey. Some are exceedingly voracious (see Walk. 
’12, p. 53) and will attack animals considerably larger than themselves. 
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Fic. 32. Color patterns. Thoracic stripes of 1, guncea; 2, eremita; 
3, canadensis; 4, caerulea. 5, Dorsum of abdominal segments 1 to 4 to 
show naming of spots after Walker. 6, Lateral aspect of same. 7, T-spot 
on top of frons of caerulea; 8, same of sitchensis. 
KEY TO THE SPECIESt 
Adults 
1 Lateral thoracic pale stripes bent twice, almost at right angles. .2. 
Lateral thoracic pale stripes not so bent.................--.-. 3. 
