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|
|Abdominal tergum I with transverse row of setae posterior to median dorsal hump (sf 19.319)||Abdominal tergum I usually lacking setae posterior to median hump (sf 19.320)|
|Scale hairs on dorsum of head (sf 19.325)||Dorsum of head without scale hairs|
|Abdominal sternum II with 2 chloride epithelia (sf 19.323)||Abdominal sternum II with single chloride epithelium (sf 19.324), 3 epithelia (smaller epithelia laterally), or without epithelia|
|Case irregularly outlined, made of small pebbles arranged in slightly curved and flattened cylinder (sf 19.335)||Case of final instar of fine gravel, slightly depressed (sf 19.336, 19.508); case of younger larvae with plant materials|
Species Allocosmoecus partitus
No further information about this genus is available on Troutnut.com at this time.