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Cocoon identification.  Will it turn into a lot of little pests?

Cocoon identification. Will it turn into a lot of little pests?
Reseda, Los Angeles County, California, USA
June 16, 2010
Size: 1-1/2" lg x 1/2" wide
The cocoon in the picture is attached to the branch of a hibiscus bush. I don't want to destroy it if it will yield beneficial insects.

Stagmomantis limbata?

Mantid Ootheca
This was great help! Thank you! I released Mantis 3 years ago and I have seen them for the last two years! Very excited to have another batch help with my organic gardening!

Moved from ID Request.

Thank you!
Hi Ken,

Thank you so much for answering, and posting the information/photos on mantids.

It is what I suspected it was, but I never saw one attached to a branch like that before. The ones I've seen previously were attached to walls like in the photos you provided.

Not pests; beneficial predators.
This is the ootheca (egg case) of a mantid of some kind:

click to enlarge

Someone else may be able to narrow the ID down for you.

Welcome to BugGuide!

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