Review of the Neotropical Piezonemus Jordan with type designations, description of Piezonemus espoch sp. nov. from Ecuador, and notes on the tribe Piesocorynini Valentine with keys to world genera (Coleoptera: Anthribidae).

The Neotropical genus Piezonemus Jordan, 1904 (Anthribidae: Anthribinae: Piesocorynini Valentine, 1960) is reviewed. Lectotypes are designated for Piezonemus durus Jordan, 1904 and P. lateralis Jordan, 1904. A new species, Piezonemus espoch Trzna, Caballero-Serrano & Carrasco sp. nov., from Ecuador is described. A key to the now three known species of Piezonemus, and colour photographs of the types, are provided. Distinguishing features of the morphologically similar species of the genera Piezonemus and Piesocorynus Dejean, 1834 are given. A key to world genera of the tribe Piesocorynini is presented. The genus Afrophaenotherion Frieser, 1984 is here transferred from the tribe Stenocerini Kolbe, 1895 to the tribe Piesocorynini (new placement).

A new species of Xylodes Waterhouse from Madagascar, with a key to the genera of the tribe Ptinini from Madagascar, Mascarenes and adjacent regions, and a key to species of Xylodes, subgenus Diegous (Coleoptera: Ptinidae).

A new species, Xylodes (Diegous) korinae Zahradnk & Trzna sp. nov. (Bostrichoidea: Ptinidae, Ptininae, Ptinini), from east Madagascar is described, illustrated and compared with other species from the subgenus Diegous Pic, 1896. Male and female genitalia are studied and illustrated. Keys to morphologically similar genera from Madagascar and adjacent areas, to both subgenera of the genus Xylodes Waterhouse, 1876, and to all species of the subgenus Diegous are presented. Ecological notes, including photographs of habitats of the new species are also provided.

New or rare Madagascar tiger beetles25. Pogonostoma (Microstenocera) borisbubeniki sp. nov., compared to P. (M.) andreevae Moravec, 2007 and a revised key to the species-group (Coleoptera: Cicindelidae).

Pogonostoma (Microstenocera) borisbubeniki sp. nov., is described from the Ambohitantely Special Reserve on the north-eastern edge of the Central Highlands, Madagascar. The new species is compared to the externally similar P. (Microstenocera) andreevae Moravec, 2007, and both are treated as members of the P. (Microstenocera) fleutiauxi species-group (as proposed in the monograph of the genus Pogonostoma Klug, 1835 by Moravec 2007). A revised key to species of the species-group is presented to supplement the key in the monograph. Habitus and diagnostic characters of the new species are illustrated in colour photographs. Not-yet-published photographs of a male allotype of P. (M.) andreevae and important diagnostic characters of this similar species, including those of one newly caught female, are provided to complete the illustrations published previously in the monograph. The habitat and ecology of the new species with essential maps of disjunct distributions of the two species are also presented.

Diastatotropis arofaniana sp. nov. from eastern Madagascar, a new species close to D. rubra Frieser, with a redescription of the type of the latter, and notes on morphology (Coleoptera: Anthribidae).

Diastatotropis arofaniana Trzna Baa sp. nov. (Anthribidae: Anthribinae: incertae sedis) is described as new from eastern Madagascar. Male and female genitalia are studied and illustrated, and colour photographs are provided. The new species is morphologically similar to D. rubra Frieser, 1992. A redescription of the female holotype of D. rubra, with the first illustrations of its habitus and genitalia are presented. Ecological notes, including colour photographs of the habitat of the new species, are provided. The curculionid type of hemisternites without toothed plates found in Diastatotropis is also discussed.

Review of the genus Merarius Fairmaire (Coleoptera: Anthribidae), with description of two new species from China.

The genus Merarius (Anthribidae: Anthribinae: Tropiderini) from the Oriental and Palaearctic regions is reviewed. Two new species, M. alexandrae Trzna Baa sp. nov. and M. korinae Trzna Baa sp. nov., from China are described. Male and female genitalia of M. korinae are studied and illustrated. A key to the now five known species of the genus, colour photographs and new data on distributions are provided.

New or rare Madagascar tiger beetles23. Physodeutera (Toxoma) lokobensis sp. nov., a new species close to Ph. (T.) conturbata Moravec, Ph. (T.) sulcoprothoracica (W. Horn) and Ph. (T.) dubia (Maan), with revised type designation of the latter (Coleoptera: Cicindelidae).

Physodeutera (Toxoma) lokobensis sp. nov. is described as new to science from the island of Nosy Be, northern Madagascar (phytogeographically Sambirano). The new species is morphologically similar and obviously close to Physodeutera (T.) conturbata Moravec, 2002, Ph. (T.) sulcoprothoracica (W. Horn, 1913), and Ph. (T.) dubia (Maan, 1942). Redescriptions and new illustrations of the type specimens of the three similar species with references to their original descriptions and redescriptions with illustrations in the monograph of the genus Physodeutera Lacordaire, 1842 (Moravec 2002a) are presented. The type designation of Ph. (T.) dubia has been revised to rectify the misinterpreted designation in the monograph. A revised key to the subgenus Toxoma Rivalier, 1967 and essential maps of the distribution are also given.

Description of a new genus and species, Portentus marschneri (Coleoptera: Anthribidae), from Penang National Park, Malaysia.

A new genus and species, Portentus marschneri Trzna Baa gen. nov. sp. nov. (Anthribidae: Anthribinae: Phloeophilini), from Penang National Park, Malaysia is described. Male genitalia are studied and illustrated and colour photographs are provided. A key is provided to distinguish Portentus from similar Palaearctic and Oriental genera of the tribe Phloeophilini: Phloeophilus Schoenherr, 1833, Bothrus Wolfrum, 1956, and Morimotanthribus Senoh Trzna, 2006.

New or rare Madagascar tiger beetles24. Pogonostoma (Microgeniatum) signifemorale sp. nov. with revised key to species of the subgenus Microgeniatum Rivalier (Coleoptera: Cicindelidae).

Pogonostoma (Microgeniatum) signifemorale sp. nov., based on a male holotype caught recently in the Ankarafantsika National Park (northwestern Madagascar), is described as new to science. The new species is immediately distinguished from other three hitherto known species of the subgenus Microgeniatum Rivalier, 1970, including a somewhat similar P. (Microgeniatum) infimum Rivalier, 1970. Consequently, a revised differential diagnosis and a revised key to species of the subgenus are presented in order to supplement the key and diagnosis in the monograph of the genus Pogonostoma Klug, 1835 by Moravec (2007). The male holotype is illustrated in colour photographs of its habitus and diagnostic characters with references to the illustrations of the other three species of the subgenus in the monograph of the genus (Moravec 2007). The habitat and ecology of the new species, as well as essential maps of known distribution of the subgenus, are also presented.