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Updated: May 2, 2025
The cocoons of the hybrid Roylei-Pernyi seem to me larger and heavier than any Pernyi cocoons I have as yet seen. The larvae of this new hybrid have been successfully reared in France, in Germany, in Austria, and in the United States of North America. The cocoons obtained by Herr L. Huessman, one of my German correspondents, are remarkable for their size and beauty. The silk is silvery white.
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