I have some waters around me in Maryland and Pennsylvania that have those little flat dark grey or dark brown cress bugs. I hope I have the name of the bug right. They look similar to an underwater potato bug (has a shell on it's back) but much flatter. I've never tied one before. Is there a good pattern that you can recommend? I'm not sure if one would be better than another. If you've got a good or favorite imitation/pattern that you like and are willing to share, I plan to tie a few over the winter. EDIT: It may also be called a scud. I'm sorry to be so vague. Like I said, I haven't tied one before.