Aphid mummies

parasitized aphids
Aphid mummies
Photo: U of MN Department of Entomology
Size: 1/8 inch long
Where/When: Found on a wide variety of plants in gardens, trees, and agricultural crops, wherever aphids are found. Can be found during spring and summer.
Significance: An aphid mummy is the result of an an aphid being parasitized by a tiny wasp called an aphidiid wasp. After the aphidiid wasp emerges, the aphid is nothing more than a bloated, hollow shell. An important natural control agent of aphids.