Spider-eggs
Guides
Baeus
micro-flea wasp
Baeus is a genus of minute parasitoid wasps in the family Scelionidae, remarkable for extreme sexual dimorphism. Females are wingless, highly compact, and flea-like in appearance with reduced or fused body segments, while males possess wings and a more typical scelionid morphology. All species are endoparasitoids of spider eggs, developing inside the oothecae (egg sacs) of diverse spider families. The genus has a cosmopolitan distribution across all continents except Antarctica, with greatest species diversity documented along the eastern seaboard of Australia.