Key to common families of insects in the Niagara region

54a) Prolegs present only at anterior end of thorax. Posterior end of abdomen swollen. SIMULIIDAE




54b) Prolegs present at anterior end of thorax and posterior end of abdomen. Posterior end of abdomen not swollen, usually with two pairs of finger-like gills and one pair of dorsal hair bundles. CHIRONOMIDAE




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