Accepted by P. Johnson: 14 Jan. 2015; published: 30 Mar. 2015 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2015 Magnolia Press Zootaxa 3941 (1): 125–130 www.mapress.com/zootaxa/ Article 125 http://dx.doi.org/10.11646/zootaxa.3941.1.7 http://zoobank.org/urn:lsid:zoobank.org:pub:49EC3DD7-10DF-484B-A4D1-4F0880E7F33B The classification of Flabellochromus and Dumbrellia (Coleoptera: Lycidae) with descriptions of two new species of Calochromus from the Sundaland Region MICHAL MOTYKA 1,2 & LADISLAV BOCAK 1,3 1 Department of Zoology, Faculty of Science, Palacky University, 17. listopadu 50, 771 46 Olomouc, Czech Republic 2 Department of Biology, Faculty of Education, Palacky University, Purkrabska 2, 771 40 Olomouc, Czech Republic 3 Corresponding author. E-mail: ladislav.bocak@upol.cz Abstract The adults of Calochromini with male flabellate antennae were studied. Two new Calochromus Guérin-Méneville, 1833 species with flabellate antennae, C. kelantanensis spec. nov . and C. harauensis spec. nov . are described. Dumbrellia Lea, 1909 (Calochromini) is proposed as a new junior synonym of Plateros Bourgeois, 1879 (Lycinae: Platerodini). Flabello- chromus Pic, 1925 is transferred to Calochromus from synonymy with Dumbrellia based on the similar shape of the pro- notum. Consequently, Calochromus lamellatus Kleine, 1926, comb. nov. from Sarawak and Flabellochromus pallidus Pic, 1925, comb. nov . (=Calochromus (Flabellochromus) pallidus Pic, 1925) from Luzon are returned to Calochromus. New combinations are proposed for three Australian species previously classified in Dumbrellia: Plateros brevicornis (Lea, 1898), comb. nov . (=Calochromus brevicornis Lea, 1898), P. pilosicornis (Lea, 1898), comb. nov . (=C. pilosicornis Lea, 1898) and P. melancholica (Lea, 1921), comb. nov . Plateros barronensis nom. nov . is proposed to replace Plateros pilosicornis (Lea, 1898), a junior secondary homonym of P. pilosicornis (Blanchard, 1853) (=Lycus pilosicornis Blanchard, 1853). Key words: Net-winged beetles, Calochromini, Plateros, new species, new synonyms, new combinations, taxonomy, Australia, South East Asia Introduction The tribe Calochromini is a widely distributed lineage of net-winged beetles characterized by the pronotum without obvious carinae, elytra without transverse costae and strongly asymmetrical phallobase (Bocak & Bocakova 2008). Calochromus Guérin-Méneville, 1833 is the largest genus of Calochromini with 160 described species and worldwide distribution (Kleine 1933). Three of the seven Calochromini genera were reported from South East Asia by Kleine (1933) and Pic (1942) and recently one of them, Falsocalochromus Pic, 1942 turned out to be a junior synonym of Platerodrilus in the distantly related subfamily Lyropaeinae (Masek & Bocak 2014). Dumbrellia Lea, 1909 is another genus reported from South East Asia. The genus was proposed for three Australian net-winged beetles and later placed in Calochromini by Kleine (1933) and Calder (1998). Pic (1925) described Flabellochromus Pic (1925), which was treated as a junior synonym of Dumbrellia by Kleine (1933). Unfortunately, the identity of these genera has never been seriously investigated. Here, we discuss the generic classification of Dumbrellia, Flabellochromus and Calochromus species and describe two new species of Calochromus from the Sundaland Region. Material and methods Adult semaphoronts were used for morphological descriptions. Male genitalia were relaxed and cleared in hot 10% KOH and dissected. All morphological measurements and photographs were taken using the ocular grid and camera on an Olympus SZX-16 binocular microscope. Abbreviations used in the descriptions are: BL—length of