This is fun! Guess the caterpillar! I am going to guess sawfly. How is that for a wild card?

Cheers,
Elisabeth

That's a very good, educated guess, Elisabeth!

I had been wracking my brain trying to figure out a white caterpillar in Zone 5? The only white cats I'm familiar with are zebra longwings.

I think sawfly it is!

Sherry

I was going to take its picture, but can't find it now. It was a long, slender thing. The sawfly cats (from internet images) look green. This was notably white with a slight pale purple cast to it. Its head was a slightly darker purple. It had numerous dots along its side.
I was hoping it was something a little more fancy than a sawfly. hahaha

There are several white sawflies, Catherine.
The elm sawfly and dogwood sawfly are two.
Sherry

Here is a link that might be useful: Dogwood Sawfly

And here's a picture of an elm sawfly.
There are others.
Sherry

Here is a link that might be useful: Elm Sawfly

It did look like the Elm sawfly cat, but didn't have that black stripe down its top. We're getting close though! :)