Argyrodes bonadea
(Theridiidae)
[Japanese name : shirokane isoro-gumo]
The spider acts like a thief. Tiny dew-drop spider, A.bonadea, doesn't weave
a web itself. This spider exists on other spiders' web, and steals small
prey from the host spider.
Sometimes, it eats the host's threads.
It is even as if it is nonexistent! It is a very small spider, silver in color.
The length is 3-4mm.