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Photo#740908
Yellow-shouldered slug, cocoon - Lithacodes fasciola

Yellow-shouldered slug, cocoon - Lithacodes fasciola
McFarland Park, Story County, Iowa, USA
August 1, 2011
Size: 9 mm
Peeled off the outer leaf layer and opened the cocoon.
I have to wonder, how do they spin the cocoon such that the end neatly pops off.

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Yellow-shouldered slug - Lithacodes fasciola Yellow-shouldered slug - Lithacodes fasciola Yellow-shouldered slug, cocoon - Lithacodes fasciola Yellow-shouldered slug, cocoon - Lithacodes fasciola Yellow-shouldered slug, pupa (dead) - Lithacodes fasciola