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Photo#679290
Katydid Eggs hatched - Microcentrum

Katydid Eggs hatched - Microcentrum
saguarosam County, Utah, USA
March 1, 2012
Size: 6.3mm
Was taking some representative shots of the maple tree in our yard. I found these on the underside of one of the branches. I knew they were eggs but couldn't id them. I tried hatching them. Nothing came of that. Except the tiny perfectly placed and sized holes they larva? ate to get out. When I took some macro pictures, you can even see the shavings by each hole. What I find amazing though not unexpected is how perfectly symmetrical each egg is and each hole is. Today, we id'd a Broad-winged Katydid, Microcentrum oblongifolia, in National Wildlife Federation Insect field guide. The inset picture showed these exact eggs and described them perfectly. My grandson and I were quite excited as I wouldn't have thought of Katydids laying eggs on a maple tree.

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Katydid Eggs hatched - Microcentrum Katydid Eggs hatched - Microcentrum

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Moved from ID Request.

These are not katydids which emerged ...
... from the eggs. Rather they were parasitoids which killed the developing young katydids. The adult parasitoids then chewed those circular holes and came out to start their life-cycle over again.

Which parasitoid was it? I'm not sure, but it was probably either a Eupelmidae or a Scelionidae.

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