Key to common families of insects in the Niagara region

12a) A single claw on each leg or abdomen terminating in 2 slender filaments or a median proleg
with 4 hooks. Beetles -- 39




12b) Each leg with 2 claws. Abdomen terminating in a single slender filament or in 2 prolegs each
with 2 hooks. Alderflies -- 31




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