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Adult <i>Cotesia (=Apanteles) medicaginis,</i> a parasitic wasp of caterpillars, including the alfalfa caterpillar, <i>Colias eurytheme.</i>. — Adult Cotesia (=Apanteles) medicaginis, a parasitic wasp of caterpillars, including the alfalfa caterpillar, Colias eurytheme..
Credit: Jack Kelly Clark