Key to common families of insects in the Niagara Pininsula region

7a) Abdomen terminating in 2 or 3 long, slender, filamentous tails. Mouthparts with mandibles
for chewing. 8




7b) Abdomen terminating in 3 broad, leaf-like gills, or in 3 short, triangular appendages.
Labium (lower lip) mask-like, forming an extendable, elbowed, grasping organ longer than the head.
Odonates -- 9




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