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 in large numbers over lawns 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. 
  • Adults are often seen visiting golden rod flowers in late summer.
  • Control is not necessary or recommended

Rev. 2020

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