Ectoparasitic wasp larvae

Here are photographs of a clump of ectoparasitic larvae I found attached to a small caterpillar. I think they are wasps in the genus Euplectrus (Eulophidae). Females apparently inject hosts with a venom that prevents the caterpillar from molting, thus preventing the caterpillar from shedding the larvae along with the discarded skin. Caterpillar was approximately 12 mm in length. Media, PA.

 

Colin Purrington Photography: Insects &emdash; Larvae of ectoparasitic wasps on caterpillar

Colin Purrington Photography: Insects &emdash; Larvae of ectoparasitic wasps on caterpillar

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