Document Type

Peer-Review Article



Until recently, little was known about life cycles of stoneflies in the Great Lakes region. Frison (1935) and Harden and Mickel (1952) reported dates of collections of adult stoneflies in,Illinois and Minnesota respectively, and thus suggested emergence patterns for midwestern species. But, as Harper and Pilon (1970) point out, the duration of the emergence period cannot be determined solely from adult collection records because of the relatively long life-span of adults. Recent studies in Quebec (Harper and Magniri 1969, Harper and Pilon 1970) and Ontario (Harper and Hynes 1972, Harper 1973a, 1973b) have added significantly to our knowledge of the life cycles and ecology of eastern Nearctic stoneflies.

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Entomology Commons