University of Maryland Extension

Scoliid Wasp

wasp in grass

Scoliid wasps are often seen flying over lawns in search of white grubs

Scoliid wasps, also called digger wasps, are a type of ground nesting wasp. Scoliid wasps are about 5/8 inch long, blue black, with blackish purple wings. There are two yellow stripes, one on each side of the abdomen. Their bodies are fairly hairy and the back part of the abdomen is covered with reddish hairs. They are generally seen flying over the lawn during the day, leaving in early evening. Scoliids are beneficial wasps parasitic on grubs. They are not aggressive and generally do not attack people. They disappear at the end of the season and help control the beetle grubs. Adults are often seen visiting golden rod flowers in late summer.

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