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Samia cynthia
The Ailanthus silkmoth (''Samia cynthia'') is a saturniid moth, used to produce silk fabric but not as domesticated as the silkworm, ''Bombyx mori''. The moth has very large wings of 113–125 mm, with a quarter-moon shaped spot on both the upper and lower wings, whitish and yellow stripes and brown background. There are "eyespots" on the outer fore wings.
==Eri silk==
The common name 'Ailanthus silkmoth' refers to the host plant ''Ailanthus''. There is a subspecies, ''S. cynthia ricini'' in India that feeds upon the leaves of castor bean, and is known for the production of eri silk, and is often referred to by the common name Eri silkmoth.
The eri silk worm is the only completely domesticated silkworm other than ''Bombyx mori''. The silk is extremely durable, but cannot be easily reeled off the cocoon and is thus spun like cotton or wool.〔"The Queen of Textiles." Nina Hyde. ''National Geographic Magazine''. Vol. 165, No. 1, January, 1984, pp. 2-49.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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