This is the Poplar Lutestring. The second I've caught here, the first was in July 2003. The Poplar part is obvious, but I've now idea the why's and where's of the "Lutestring" name.
I was pleased when I found the first one in my actinic trap, that I run next to the greenhouse, so I was surprised to find a second one in one of the "black-light" traps.
Some pugs are really difficult to identify, but this one is striking in appearance. Once the slightly larger Foxglove Pug has been eliminated theres nothing else like it.
I had a picture of the much rarer Scarce Chocolate Tip on July 27th, so it's good to get the commoner one to compare with it.