Entomology (Study of Bugs)/What is this please?



Hello, I just found these bugs in my home.  I have no idea what they are.  They are small, they look like a bee and a fly.  I live in Waipahu, Hawaii.  Can you help me.  When they are not on the windows they are on the floor...they do not fly much, while on the floor they actually give little jumps, almost like a grass hopper.  When I try to kill them they do not die with just a swatter they must be smacked a few times hard. Thanks

Hi, Iris:

Fear not, the insects in your images are tiny, stingless wasps called chalcids.  I believe it is a species in this genus:


They are parasitic on other insects, as described in my blog post on them:


Hope this helps put your mind at ease.  Please consider these insects as "friendly," and let them go about their business.


Entomology (Study of Bugs)

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Eric R. Eaton


I answer insect and spider identification questions ONLY. Attach images if possible. No "what bit me?", "what do I feed this bug in captivity?", or science fair project questions please. NO TECHNICAL QUESTIONS ABOUT INSECT PHYSIOLOGY.


Principal author, Kaufman Field Guide to Insects of North America. Professional entomologist employed previously at University of Massachusetts, Chase Studio, Inc., and Cincinnati Zoo; contract work for West Virginia Department of Natural Resources, Smithsonian Institution, and Portland (Oregon) State University.

Author, Kaufman Field Guide to Insects of North America, Missouri Conservationist magazine, Ranger Rick, Birds & Blooms, Timeline (journal of the Ohio Historical Society). I have contributed to several books as well.

Oregon State University, undergraduate major in entomology, did not receive degree.

Awards and Honors
One of the top 50 experts in all categories for AllExperts.com, 2009.

Past/Present Clients
Principal author of the Kaufman Field Guide to Insects of North America, Smithsonian Institution (contract), Cincinnati Zoo (employer), Portland State University (contract), Chase Studio, Inc (employer), Arkansas Museum of Discovery (guest speaker). Currently seeking speaking engagements, leadership roles at nature festivals, workshops, and ecotours.

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