Three new species of Lonchaeidae are described from material reared from fig syconia in Japan: Silba inubiwa sp. nov., S. ishigaki sp. nov. and S. japonica sp. nov. Based on the taxonomy of these and similar species the boundaries of the genus Silba are re-evaluated, and, as a result, it is considered that Setisquamalonchaea Morge is synonymous with Silba Macquart. A revised key and generic notes on the tribe Lonchaeini are provided.