Labium and labial palps removed from the mouth. I think all that's left of the palps is the clear exuvium from a nymph that was perhaps on its way to emerging any minute, but the shape is still pretty evident.  Female Baetis tricaudatus (Blue-Winged Olive) Mayfly Nymph from the Yakima River in Washington
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Labium and labial palps removed from the mouth. I think all that's left of the palps is the clear exuvium from a nymph that was perhaps on its way to emerging any minute, but the shape is still pretty evident.
Female Baetis tricaudatus (Blue-Winged Olive) Mayfly Nymph from the Yakima River in Washington

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