S undevall's Writhing Skink, Mochlus sundevallii (Smith 1849), is a common fossorial species that is widely distributed in southern Africa (Freitas et al. 2018) , where it is associated with arid sandy habitats (Branch 1998; Bates et al. 2014 ). This species was long thought to be a species complex containing two different taxa, M. sundevallii and M. afer (Peters 1854) (Broadley 1966). However, a recent integrative study combining phylogenetic and molecular data indicated that, despite some

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... tic differences between populations across its extensive distribution, no evidence supported the existence of two taxa, rendering M. afer a junior synonym of M. sundevallii (Freitas et al. 2018) . Despite its abundance and wide distribution (Bates et al. 2014; Freitas et al. 2018) , little is known about the diet of M. sundevallii. The few data available suggest that the species feeds mainly on small invertebrates, such as ants, termites, beetles, spiders and spider eggs, grasshoppers, crickets, cockroaches, soft snails, caterpillars, and insect larvae, and myriapods (