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caterpillar 2

caterpillar 2
Mississauga, Peel Region, Ontario, Canada
September 21, 2015
Was thinking Pero perhaps, but the body almost looked too thick...any help would be much-appreciated!

Images of this individual: tag all
caterpillar 2 caterpillar 2

Moved from ID Request.

I think Pero might be right.
I think Pero might be right. What was the host plant?

Unfortunately, this caterpillar was
found crawling low in grasses (near the surface of the ground) in a bramble of Red Raspberry and Goldenrod, so I'm not sure of the host plant.

For what it's worth, I've had
For what it's worth, I've had several encounters with Pero caterpillars associated with goldenrod and/or aster in old-field habitat in Minnesota. The ones I sweep-netted at night fed on both and eclosed as clear Pero species adults, but I'm still not sure which species. Evidently either Pero host plants are considerably under-reported, or (just maybe) there is/are undescribed Pero species. Despite all this lack of clarity, I strongly suspect your caterpillar is a Pero based on the strongly cleft head and the overall striped markings which much resemble those I have photographed and reared. I do have voucher specimens which perhaps merit DNA analysis.

Very interesting! Thank you so
much for taking the time to share these observations and for drawing my attention to the morphological features that I should be paying attention to when identifying Pero caterpillars. Your help is greatly appreciated Jim.

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