Larva of peach twig borer, Anarsia lineatella, that has been parasitized and killed by the wasp Copidosoma (=Paralitomastix) varicornis. The numerous, oblong, immature parasites are visible through the caterpillars' covering.

Parasitized peach twig borer--gregarious parasite, probably Paralitomastix varicornis, 5X; . Credit: Jack Kelly Clark
Larva of peach twig borer, Anarsia lineatella, that has been parasitized and killed by the wasp Copidosoma (=Paralitomastix) varicornis. The numerous, oblong, immature parasites are visible through the caterpillars' covering. Credit: Jack Kelly Clark