University of Maryland Extension

Scoliid Wasps - Lawns

Scoliid wasp on goldenrod
Photo: Whitney Cranshaw, CSU, Bugwood.org

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

  • These are actually good guys (parasites)
  • Another group of ground nesting wasps are the digger or Scoliid wasps. 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 beetle grubs, including Japanese beetles.
  • They are not aggressive and generally do not attack people. They disappear at the end of the season.
  • Adults are often seen visiting goldenrod flowers in late summer.
  • Management is not necessary or recommended.

Scoliid wasp on lawn
Photo:Whitney Cranshaw, CSU, Bugwood.org

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