Inherited bacteria are now recognized as important players in arthropod evolution and ecology. Here, we test spiders, a group recently identified as possessing inherited bacteria commonly, for the presence of two reproductive parasites, Cardinium hertigii (Bacteroidetes group) and Wolbachia (α‐proteobacteria), estimating incidence, prevalence, any sex bias in infection, and infection diversity, for a panel of field‐collected s...