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Life cycle of an aphid
parasite. A: An adult parasite lays an egg inside a live aphid. B: The
egg hatches into a parasite larva that grows as it feeds on the aphid's
insides. C: After killing the aphid, the parasite pupates. D: An adult
wasp emerges from the dead aphid, then flies off to find and parasitize
other aphids.
Illustration by David Kidd.
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