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White larva of a parasitic wasp, Cotesia (=Apanteles) medicaginis, dissected out of an alfalfa caterpillar, Colias eurytheme.

Alfalfa caterpillar pulled apart to show Apanteles larva within 2X; . Credit: Jack Kelly Clark — White larva of a parasitic wasp, Cotesia (=Apanteles) medicaginis, dissected out of an alfalfa caterpillar, Colias eurytheme. Credit: Jack Kelly Clark

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