Theridiidae

Theridiidae, also known as the tangle-web spiders, cobweb spiders and comb-footed spiders, is a large family of araneomorph spiders that can be found in every continent, excluding Antarctica.

Webs
They often build tangle space webs, hence the common name, but Theridiidae has a large diversity of spider web forms.

The well studied kleptoparasitic members of Argyrodinaelive in the webs of larger spiders and pilfer small prey caught by their host's web. They eat prey killed by the host spider, consume silk from the host web, and sometimes attack and eat the host itself.