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unknown caterpillar on willow - Cimbex americanus

unknown caterpillar on willow - Cimbex americanus
Londonderry, New Hampshire, USA
August 19, 2007
The location is a wet meadow mowed every fall, lots of new shrub growth. Found one of these guys in July and 2 today. On willow shoots. Want to raise but need to know ID to facilitate

Moved from Elm sawfly.


Cimbicidae, Cimbex americana
Cimbicidae, Cimbex americana

that looks like
these, which i took of a caterpillar. Sawfly?

I also took another shot of a sawfly larva that looked completely different... how are there so many different varietes?


It's a sawfly larva
quite possibly Cimbex americana. I've not had success with trying to raise sawflies myself, but I think they need loose soil or leaf litter to pupate.

yellow larva
Thanks. That would explain why I couldn't find anything like it in Wagner's caterpillar book!! It's a very cool critter, but maybe I'll just put them back outdoors. Elm or not, they were very happy chowing down on willow.

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