There are at least two bands named HELLMOUTH
These are photos from concerts where Hellmouth played, so they may be of other bands that played the concert as well.
Hellmouth / Explode and Make Up / Child Bite / Battlecross / Beast in the Field Nov 26, 2010 Detroit, Michigan, United States Uploaded by Acuity
Hellmouth / Against The Grain / Snakewing / Isosceles Mountain / Knife May 7, 2010 Detroit, Michigan, United States Uploaded by Acuity