Subject: Metallic green with a huge stiner. What is it?
Location: Boise, Idaho
June 30, 2013 9:43 pm
We have found 8 of these so far living in our bedroom. So far only 2 have been alive and the rest have been dead. Being allergic to bee’s and not knowing what these are the two living ones met their maker as well. They are just about impossible to squish it seems and crunch over and over. During this I noticed their stinger is long as can be and was twitching like crazy in and out.
What is this thing and any idea why they are invading our bedroom, or more specific most of them we found are right near out window that has been closed up and what we thought sealed.
If needed I did keep the body of one of the victim and can take some more pictures.
Signature: Tracy

Cuckoo Wasp

Cuckoo Wasp

Dear Tracy,
This is a Cuckoo Wasp in the family Chrysididae.  According to BugGuide:  “Some species are parasitoids and others cleptoparasites. Either way the host larva dies.”  BugGuide elaborates on those term:  “Parasitoids feed on the larva of the host and cleptoparasites ‘steal’ the host’s food. The food-stealing behavior of cleptoparasite species resembles that of the cuckoo bird and gave rise to the cuckoo wasp’s name. Hosts of parasitoid species include bees, sphecid wasps, potter wasps, sawflies, silk moths, and the eggs of stick insects. Cleptoparasitic species feed on provisions of sphecid wasp nests, which may include dead spiders, true bugs, aphids, or thrips.”
  If you have sash windows, you might want to look for the remains of a nest of Leafcutter Bees which often nest in the grooves of sash windows.  Perhaps the nest of the Leafcutter Bee was parasitized by a female Cuckoo Wasp and her progeny emerged.  Since you are so concerned about being stung, you should take note of this information also provided by BugGuide:  “The female sting has been modified into an egg-laying tube with highly reduced valvulae and poison gland. As a result, unlike most other aculeates, chrysidids cannot sting and can be easily handled.”  Most insects found in the home would much rather be outdoors, and the best way to remove them is with a glass and postcard.  First trap the insect in the glass and then slide the postcard underneath the glass and move outside to release.

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Location: Boise, Idaho

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