This is just about the most Isonychia bicolor shucks I've ever seen on the rocks, and appropriately enough they're on the river where Art Flick described them in his Streamside Guide. From Schoharie Creek in New York.
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This is just about the most Isonychia bicolor shucks (

Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
Shuck: The shed exoskeleton left over when an insect molts into its next stage or instar. Most often it describes the last nymphal or pupal skin exited during emergence into a winged adult.) I've ever seen on the rocks, and appropriately enough they're on the river where Art Flick described them in his Streamside Guide.

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