I started to think the opposite - mostly what people though were midges, were mainly blackflies or whatever the non biting form we've got around here...the larvae are everywhere in the tailwaters and often confused for midges - but hey, really its all the same for a patten so no point splitting to many hairs - zebras, zebras, zebras - it'll cover your midge and your blackfly larvae. Though, emerging - its interesting to note that blackflies bubble up and do the caddis thing so for what thats worth...so thier dry profile is different if you'd really want to make seperate patterns - sometimes that part does make a difference on finicky fish... heck when in doubt, chuck a streamer go for the monster thats trying to eat the little guys sipping the micro bugs