ANOTHER MYSTERY INSECT

Hi

My cat brought us this bug. I live in Mass & have never seen this in over 50 years that I've been here. Please help if you can.

Tom

I think that it is a hawkmoth (sphynx) of some species, which has not developed full wings, either because it was still emerging when the cat caught it, or because of some injury, or developmental disorder.

But what do YOU think?