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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Symphyta" - Sawflies, Horntails, and Wood Wasps » Horntail Wasps (Siricidae) » Tremecinae » Tremex » Pigeon Horntail Wasp (Tremex columba)
Photo#1776296
Tremex columba adult female - Tremex columba - female
Copyright © 2020 Jason Hill

Tremex columba adult female - Tremex columba - Female
White River Junction, Windsor County, Vermont, USA
January 14, 2020
Size: 1 inch long
Found (dead?) in a cut section of red maple firewood from our yard that was felled and split in early January. Body is 2.5 cm long; ovipositor is 1 cm. Chamber is at least 5" deep (i.e., away from the bark) into this section of trunk.

Images of this individual: tag all
Tremex columba adult female - Tremex columba - female Tremex columba adult female - Tremex columba - female Tremex columba adult female - Tremex columba - female Tremex columba adult female - Tremex columba - female
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Contributed by Jason Hill on 3 February, 2020 - 1:03pm
Last updated 6 February, 2020 - 9:28pm

Moved
Moved from ID Request.

Not a larva (see image here). And it doesn't really look like a pupa either. Rather this appears to be fully winged, and thus an adult.
… Ken Wolgemuth, 4 February, 2020 - 7:34am login or register to post comments

 
Thanks!
Thank you Ken. I didn't realize that the adults burrowed. I thought they laid their eggs on the trunk and took off. I need to look more into their biology.
… Jason Hill, 6 February, 2020 - 9:27pm login or register to post comments

 
The adults don't burrow...
...but larvae pupate and transform into adults there. Then they emerge to mate, lay eggs and complete the cycle.
… Ken Wolgemuth, 6 February, 2020 - 10:18pm login or register to post comments

 
Got it!
I see--that seems like a long time to squeeze into a tunnel (after transforming into an adult) with wings. I think they emerge in late summer. Very cool. This was had many inches of chewing left to reach the outside. Thanks Ken.
… Jason Hill, 7 February, 2020 - 1:13pm login or register to post comments

 
Photo added
Ken, I added another photo showing the tunnel as that may be informative.
… Jason Hill, 6 February, 2020 - 9:33pm login or register to post comments

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