Vanhorniidae - Vanhornia eucnemidarum - Vanhornia eucnemidarum - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Proctotrupoidea » Vanhorniidae » Vanhornia » Vanhornia eucnemidarum

Photo#165322

Copyright © 2008 Dennis Haines

Vanhorniidae - Vanhornia eucnemidarum - Vanhornia eucnemidarum -

Tippecanoe County, Indiana, USA
June 15, 1977
Size: ca. 7 mm.

Caught in a malaise trap.

Images of this individual: tag all

Vanhorniidae - Vanhornia eucnemidarum - Vanhornia eucnemidarum - female

Vanhorniidae - Vanhornia eucnemidarum - Vanhornia eucnemidarum - female

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Contributed by Dennis Haines on 15 January, 2008 - 2:59pm
Last updated 16 January, 2008 - 11:06am

Eucnemid hosts

I found them in Wisconsin over 12 years ago. The best time to find these wasp to search out a large tree with exposed hard sapwood of deciduous trees like maples. In June, Eucnemids like Isorhipis obliqua or Isorhipis ruficornis are seen swarming all over the wood surface, maiting. These beetles are maiting and laying eggs in the crevices. The wasps come in and seek out the eggs where she inserts her own egg inside the beetle's egg. So far, parasitism is known only in these two eucnemid species.

… Robert Otto, 6 March, 2008 - 9:50pm

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Great

I'll have to watch for these.

… Brad Barnd, 16 January, 2008 - 11:50am

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This guy seems to match. (maybe)

Brad, can you please check this guy out. (below) It may be a male counterpart to this female. (above)
Check out the pronotal carina, head and body shapes, wing pattern, legs, etc...everything but the stinger.

I'm not sure of the gender, but it has about 11 flaglellomeres. (F1 is shorter than her's)

… Bob Biagi, 18 April, 2017 - 8:36pm

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As the name implies, they par

As the name implies, they parasitize the larvae of Eucnemidae. So I assume they would be found near old wood lots where rotten wood would be available for the beetles.

By the way, I got the specimen in the photo from John MacDonald. I believe John is retired now from Perdue, but working with the museum.

… Dennis Haines, 16 January, 2008 - 11:55am

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