Potter Wasp Pots

Subject: Found on ficus
Location: Southern NY
February 10, 2014 7:08 pm
Hi Bugman,
We had a ficus plant on our porch this summer. We brought it in last September when the weather started getting colder. I noticed what I thought was a cocoon, but my friend said it was an egg sac. It looks like something hatched out of one side. What kind of bug would make this?
Thank You Bugman,
Signature: Perplexed in NY

Potter Wasp Pots
Potter Wasp Pots

Dear Perplexed in NY,
These are nests of a Potter Wasp.  According to BugGuide:  “Females lay egg in mud nest (built on twig, etc.), then provision with small caterpillars esp. cankerworms. Also reported to provision with sawflies.”
  BugGuide also indicates:  “There are at least two generations in a year, from late spring to early fall. Overwintering takes place at the prepupal instar, in the mud pots built by last generation mother females. Emerging adults will be the first generation of next year.”

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