in spring, and in early summer Argyrodes kumadai (Theridiidae) [Japanese name : chiri isoro-gumo]
itself; it relies on the other spiders' webs, and steals prey from the host spider. And sometimes, it eats the host spider. The length is 7-8mm. It is found on four main islands in Japan - namely, Honshu, Shikoku, Kyushu, and Okinawa.
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The spider acts
like a thief. A.kumadai doesn't weave a web 
