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University of Minnesota Extension

Species detail

Pompilidae (Spider wasps)



Pompilidae is a family of solitary nests. There are many species in north America but we do not have Bee Atlas specimens identified to species yet.


Pompilidae have characteristically long legs; the hind femur extends past the tip of the abdomen when stretched out. They do not fold their wings at rest. The specimens in the Bee Atlas project are frequently medium sized black wasps and have a dusky band across the forewing which is pretty distinctive.

Nest Structure

Pompilidae found in Bee Atlas blocks are solitary-nesters. Prey choices, as indicated by their common name, are generally spiders. Adults feed on nectar and leaves. Frequently, female Pompilidae search for spiders on the ground and in trees, paralyze their catch and lay a single egg on each prey item. Some cache their spiders first; this may be the case with our specimens. We aren’t sure yet if our pompilids are exclusively building nests or maybe also just taking advantage of the spiders that frequent our blocks or spiders cached by other wasps (See Trypoxylon). Our pompilids emerge primarily from holes with either mud/sand plugs or chewed leaf plugs.

Hole Sizes

Most frequently used holes are in the lower 3rd column and the second column on Bee Atlas blocks


no information at this time.

Activity Period

no information at this time.


No information at this time.

Minnesota Record Map

These data are from the Minnesota Bee Atlas project.

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