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I found this on a rock wall beside a parking lot in suburban Massachusetts, USA. It contained hymenoptera coccoons about 1 cm long and was covered in 4 mm Torymidae, probably parasitoids or hyperparasitoids. I could not get an ID on BugGuide (http://bugguide.n...iew/192545), but there was a comment that the fibers of the white object might be synthetic. The disk was spongy, not hard.