CLOSED: Small wasp on spider egg sack

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Sarahskeeper Brockton, MA(Zone 6a) Sep 19, 2006

I've been watching 2 Yellow & Black Argiope spider egg sacks for a couple of weeks.
A few days ago I noticed one had small holes in it. Yesterday I saw a couple of these little wasp like flies milling around.
What are they? I suspect they are eating the little spiders.
You can see one of the holes near the top.
Andy P

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Sarahskeeper Brockton, MA(Zone 6a) Sep 23, 2006

The fine folks at BugGuide.net ID-ed this one as a parasitic Ichneumon Wasp.
My little spiderlings are doomed.
Andy P

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ceejaytown The Woodlands, TX(Zone 9a) Sep 23, 2006

I would have said braconid, with the same results... So sorry. I love the Y&B Argiopes!

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Sarahskeeper Brockton, MA(Zone 6a) Sep 23, 2006

CJ, I have a second egg sack that is OK, so far.
Andy P

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