The net-winged beetles are often highly similar in external morphology due to evolution of common aposematic patterns. The reliable diagnostic characters are found only in males; mostly in their genitalia, size of eyes and shape of antennae. Molecular delimitation can provide further data to distinguish morphologically similar species and provide additional evidence when morphology based delimitation is ambiguous. Here, we present a review of Cautires with a single pronotal areola from Peninsular Malaysia. Five species have previously been described from the western coastal area of the Malay Peninsula and we identified further six species, four of them from male representatives and formally described here: C. paraimitator sp. nov., C. tanahratensis sp. nov., C. parallelus sp. nov., and C. tapahensis sp. nov. We demonstrate the high congruence between DNA and morphology based delimitation of species in most cases. DNA data enable identification of the female semaphoronts and the species variable in color patterns. The external morphological characters and male genitalia are illustrated and an identification key is provided.