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Photo#592464
Microcentrum (Angle-wing Katydids) - eggs with white 'plug' - Anastatus

Microcentrum (Angle-wing Katydids) - eggs with white 'plug' - Anastatus
Camp Creek Run, Marlton, Burlington County, New Jersey, USA
June 29, 2011
Size: Maybe around 4.5 - 5 mm?
I think that these are the eggs of one of the Microcentrum (Angle-wing Katydids), but my question is about the white 'plug' in one of them... what made it? Did some other insect move into the empty shell and plug the hole?

Images of this individual: tag all
Microcentrum (Angle-wing Katydids) - eggs with white 'plug' - Anastatus Microcentrum (Angle-wing Katydids) - eggs with white 'plug' - Anastatus Microcentrum (Angle-wing Katydids) - eggs with white 'plug' - Anastatus

Moved
Moved from Frass. I've been on the fence about whether these were worth saving, then I decided maybe one or two were, so I moved them before the system deleted them.

Frassed
Moved from ID Request.

Plug
I'm not aware of anything small enough to fit in that hole that would do such a thing, but it sure looks like a miniature version of what a keyhole wasp would do... the only other possibility that comes to mind is that the empty egg shell filled up with some kind of fungus, but I've never seen anything like that before either. I trust you're saving it to see what happens...

 
Info
I've been told that the holes are not from the katydids hatching (as I thought), but probably from Anastatus wasps. Is there anything else that would do this?

 
Apparently not
A search for Microcentrum here yields only Anastatus spp. So unless there's some platygastrid that parasitizes katydid eggs, the only known options are in that genus.

If you haven't seen it already, check out this image, and my comment linking to an image of hatched katydid eggs:

 
Sorry
I only shot the images of someone elses find. At the time I thought it was just the eggs and didn't see the plug until the day I posted these.

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