The Pugs are a group that I often have trouble with and this one's I couldn't ID without knocking it out and brushing off the scales to reveal the abdominal plate. If you have a microscope and a bottle of Ethyl Acetate then all but one male Pugs should be no problem to ID.
With little birding and mothing on offer at the moment I thought I would publish some of my gen det moths to test your ID skills. Here is the first one. I will publish the answer soon in the comments section.