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Peracca omissa sp. nov. and P. derelicta sp. nov. from western part of Malaysia are described. These species are very similar to P. conspicuithorax Griffini, 1897 and P. mirzai Tan et Ingrisch, 2014 but differs from them in the shape of some male abdominal structures. Peracca macritchiensis Tan et Ingrisch, 2014, syn. nov. from Singapore is synonymized to P. tiomani Gorochov, 2011 described from Tioman I. near southern part of Malacca Peninsula.
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A.V. Gorochov (2015) studied this question.
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