Key to common families of insects in Georgian Bay

10a) Antenna very small, almost inconspicuous, consisting of one segment. Many species within
cases of stones, bark, stem or leaf material. Ventral abdomenal gills sometimes present.
Caddisflies -- 18




10b) Antenna filamentous, consisting of at least 3 segments. Not found in cases. Ventral
abdomenal gills absent; single pair of long laterial filaments may be present. 11




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