Is your blackfly the same as the horsefly we have out west?
Our horsefly hurts like H E double toothpicks when they bite and Uncle Fester shows up if you don’t use anaseptic.
Like the puncher the other day, probably not worth the trouble...but I love it !
http://www.freerepublic.com/focus/f-news/3891932/posts#comment
Our black flies are smaller than horse flies (they bite too) but, they swarm.
Think of 10,000 immature horseflies looking for a meal.