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Cocoon of Cotesia (=Apanteles) medicaginis, a parasitic wasp of caterpillars including alfalfa caterpillar, Colias eurytheme.

Apanteles cocoon on alfalfa leaf, 1X; . Credit: Jack Kelly Clark — Cocoon of Cotesia (=Apanteles) medicaginis, a parasitic wasp of caterpillars including alfalfa caterpillar, Colias eurytheme. Credit: Jack Kelly Clark

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