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Photo#364393
Female yellow wasp - Megastigmus - female

Female yellow wasp - Megastigmus - Female
Delta, British Columbia, Canada
January 2, 2010
Size: about 3 mm, (body)
I submitted a male that seems to be the same species a few days ago. (http://bugguide.net/node/view/362057). I've been searching for a place they come from, and narrowed it down to probably an old bag of bird seed infested with Indian meal moths. Some of the caterpillars pupate, then hatch; a few turn blackish and don't hatch. I have a couple of those in a bottle to see if a wasp emerges.

Moved
Moved from Torymidae.

Megastigmus…
Can be safely moved to the genus level for now.

See reference here.

Moved
Moved from ID Request.

Right!
Indeed you're right with assuming it's a torymid and not a pteromalid. The coxa (hip) of the third pair of legs is enlarged and about 3 times bigger than the coxae of the other legs.
One of the characters of torymids. I overlooked it when I saw the picture. There are also pteromalids that are yellow with a longer ovipositor....
And megastigmus seems to be a good candidate!
Greetings

 
Wasp wings
Have you checked out http://www.drawwing.org/node/1 This site has wing images. I assume that it uses software similar to fingerprint identification or face recognition. Some day you will scan in a wing - poof - up pops the ID. For now wasps wings are best represented, but even they are few in number. I could not find your wasp. Perhaps you could contribute to the data base.

 
drawwing
Interesting site! I've bookmarked it. Unfortunately, I don't have the equipment at present to provide scans to their specifications. More stuff on my shopping list!

 
Thanks!
Thanks!

Superfamily Chalcidoidea, Family Pteromalidae
Would be my idea!
greetings

 
Could it be
Megastigmus (Torymidae)?

These are non-parasitic chalcids that develop inside seeds instead of inside other insects. I was reminded of Megastigmus when I saw the thumbnail image, and the association with a bag of birdseed would seem to support that thought... but I know nothing of the technical characters that would separate a torymid from a pteromalid.

(Edit: I just looked at the photos of the male and I see that you were already thinking Megastigmus, Susannah. Well, I'm curious what others have to say about this possibility.)

 
Megastigmus?
I've separated the seeds; sunflower in one jar, small stuff (regular bird seed) in another. So I'll keep an eye on them as well as the Indian meal moth pupae.

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