This huge (45mm long) moth came to the UV light when I had it out last night, and flew into the house, before returning to the light to fly around it. I captured it to get a better view of the hindwing patterning, by daylight, so the pictures are of it fluttering as it warms up in Monty's hands. Penitent Underwing (Catocala piatrix), Somerville MA 9/19/2015.