Jap.: Shirokaneisourougumo
Its the small silver-white sider on the lower left side. It lives in the nets of big spiders (in this case Jourougumo (Nephila clavata)) and "participate" in the meal of the net owner (as above), or take insects caught in the net which were ignored by the net owner for being too small. Sometimes, more than ten of these small spiders live in the net of a big one.