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Photo#197661
parasitized 07/01 - Lymantria dispar

parasitized 07/01 - Lymantria dispar
Toronto, Ontario, Canada
July 1, 2008
Size: 12 mm
forgot about this one for a couple of days. Unfortunately the leaves it was eating dried out. Clearly, though, by this time food is not going to help - the cocoon of a parasitoid has appeared underneath the caterpillar. I was interested also to see its size had shrunk back from 20mm to 12mm.

I found a very similar image on the web here, which identifies the parasitoid in question as probably "a wasp, Apanteles melanoscelus, which attacks young larvae."

Images of this individual: tag all
early instar on beech 06/22 - Lymantria dispar early instar on beech 06/22 - Lymantria dispar fresh molt 06/23 - Lymantria dispar getting bigger 06/26 - Lymantria dispar parasitized 07/01 - Lymantria dispar