| Summary: | <i>Richardsitas</i> Betsch is a small genus of Sminthurinae with only two species described so far, both from Madagascar. It resembles other Sminthurinae with long antennae, especially <i>Temeritas</i> Richards. Here we provide the first record of <i>Richardsitas</i> from Australia, <i>Richardsitas subferoleum</i> sp. nov., which is similar to <i>R. najtae</i> Betsch and <i>R. griveaudi</i> Betsch in males’ large abdomen chaetotaxy and presence of tenent-hairs on tibiotarsi II–III, but lacks mucronal chaeta and has 28 segments on the fourth antennal segment plus a unique pair of sensilla on the second. We also provide an updated genus diagnosis to <i>Richardsitas</i>, a key to its species, a discussion of the affinities of <i>Temeritas</i> and <i>Richardsitas</i> to other Sminthurinae, and an updated key to this subfamily.
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