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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » parasitic Apocrita » Braconids and Ichneumons (Ichneumonoidea) » Ichneumon Wasps (Ichneumonidae) » Rhyssinae » Giant Ichneumons (Megarhyssa) » Megarhyssa macrurus
Photo#20194
Giant Ichneumon Wasp - Megarhyssa macrurus - male
Copyright © 2005 Paul Christian

Giant Ichneumon Wasp - Megarhyssa macrurus - Male
Ortonville, Oakland County, Michigan, USA
June 11, 2005
Size: 1 to 2"
Three sizes or stages observed. The smallest ones seem to be living in the tree coming and going through a small hole. The mid size one has the long tail but not the darker color. The largest one has beautiful coloring and is 4 to 6" long including tail, adult? All seemed to be living together as I have observed them over several days.
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Contributed by Paul Christian on 14 June, 2005 - 7:05am
Last updated 23 October, 2006 - 5:33pm

Moved
Moved from Orange and Brown.
… john and jane balaban, 23 October, 2006 - 5:33pm login or register to post comments

Adults
They are all adults. If they have wings they are fully grown; so the size differences are due to belonging to different species or different sexes.
… Beatriz Moisset, 14 June, 2005 - 12:33pm login or register to post comments

These look like males
Check at . Eric will tell us more, but they may have developed on beetle larva in the tree and are now just emerging. Fascinating images and story.
… john and jane balaban, 14 June, 2005 - 9:29am login or register to post comments

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