In rotting log. Very torpid. Body length about 5mm. Air temperature about 46 degrees Fahrenheit
large beetle came to lights
Female Hercules beetle
Nice quick guide to Maryland's scarabs.
Perusing that, some of the options: Eucanthus subtropicus, Geotrupes, Acrossus rubripennis, Aphodius fimetarius, Irrasinus stupidus, possibly several more.