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 |
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Left and right metanotal sa1 sclerites fused into a single sclerite (sf 19.280) | Metanotal sa1 sclerites not fused, although often contiguous (sf 19.277) |
Abdominal sternum II with chloride epithelium (in which case abdominal segment IX with only a single seta on each dorsal sclerite, similar to sf 19.287, Hydatophylax argus, eastern North America) or without chloride epithelium (in which case abdominal segment IX with tuft of 3–6 setae, sf 19.287 inset, Hydatophylax hesperus, western North America). | Abdominal sternum II without chloride epithelium and abdominal segment IX with only single seta on each side of dorsal sclerite (sf 19.287) |
Case of wood or leaves in irregular outline (sf 19.434) | Case of twigs, gravel, or leaves, variously shaped (sf 19.435) |
Widespread except not Southwest | Central, East, North |
3 Example Specimens | |
Hydatophylax | Pycnopsyche |