The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
|Option 1||Option 2|
|Has a row of long, hairlike setae along the margin of the clypeus||Lacks a row of long, hairlike setae on the clypeus|
|More robust, less flattened general appearance||Usually a very flattened general appearance|
|Almost always has a pair of prominent, paired, stout, suboccipital spines||Sometimes has only small bumps, other times more prominent suboccipital spines|
|Drunella tuberculata||Drunella walkeri|