Helophorus Fabricius, 1775 (Coleoptera: Hydrophiloidea: Helophoridae) is an old and largely Holarctic genus of beetles, with most extant diversity concentrated in the Palaearctic. As with a number of primarily northern temperate lineages, the genus has colonised the Afrotropical Region, with species…

A new seed bug species, Stigmatonotum macronotum sp. nov., collected from southern Chiba prefecture, central Honshu, Japan is described. It is the seventh species in the genus Stigmatonotum Lindberg, 1927. Stigmatonotum geniculatum (Motschulsky, 1863) is recorded from South Korea for the…

Two new genera of pygmy grasshoppers belonging to the subfamily Batrachideinae (Orthoptera: Tetrigidae) are described from Central America, each including a single new flight- less species. Naskreckiana kosemeni Kasalo, Buzzetti & Skejo gen. & sp. nov. is described from Costa Rica,…

A new species of Scaphobaeocera Csiki, 1909 from Yunnan, China, S. setosa sp. nov., is described. It is unique in having strongly enlarged male protarsomeres with long oblique setae, forming a fan-like structure. The new species may be also readily distinguished from its congeners by its…

The ant-loving beetle genus Songius Yin & Li, 2010 (Coleoptera: Staphylinidae: Pselaphinae: Batrisini) is rarely collected due to a cryptic myrmecophilous lifestyle, and its diversity remains insufficiently explored. Here we describe two new sympatrically distributed species from Mount Fanjing,…

The larval morphology of Crephelochares Kuwert, 1890 and Peltochares Régimbart, 1907 is described in detail based on specimens of C. abnormalis (Sharp, 1890) and P. atropiceus (Régimbart, 1903) collected in Taiwan; the chaetotaxy of the head capsule and head appendages of both genera is…

A new genus and new species of Trechina (Coleoptera: Carabidae: Trechinae: Trechini), Ryukyuaphaenops pulcherrimus gen. & sp. nov. is described from the Ryukyu Archipelago, Japan. This is the first troglomorphic Carabidae in the Ryukyus and probably the most cave-adapted beetle in Japan.…

The knowledge of the diversity of leaf litter cerambycid fauna is limited, particularly in the Neotropics, where several species likely remain unreported. Most of these small and apterous beetles commonly belong to the tribe Apomecynini (Cerambycidae: Lamiinae). Herein, one new genus and two new…

A new genus and species, Apollo maculiceps gen. & sp. nov., in the planthopper family Cixiidae is described from south Western Australia. It can be distinguished from all other Australian Cixiidae by the presence of a denticle on the distal part of the fore coxa, a character that is shared…

The Taiwanese bee species of the subgenus Leuchalictus Warncke, 1975 of the genus Lasioglossum Curtis, 1833 are revised. Three species are recognised, Lasioglossum formosae (Strand, 1910), Lasioglossum subopacum subopacum (Smith, 1853), and one new species, L. subinoum sp. nov., which was…

Chalarus Walker, 1834 (Diptera: Pipunculidae: Chalarinae) has a cosmopolitan distribution, with 11 known species in the Neotropical Region, but none recorded in Colombia. Two new species of Chalarus are described from Colombia, namely Chalarus boyacensis sp. nov. (type locality: Cabaña Chaina,…

Tolumnia immaculata Distant, 1900 (Hemiptera: Heteroptera: Pentatomoidea: Pentatomidae: Pentatominae) is redescribed based on the study of primary types and additional specimens from India and Sri Lanka. This species is found to not be congeneric with the rest of Tolumnia Stål, 1868, including the…

A first attempt is made to revise the European species of the gall midge genus Planetella Westwood, 1840 (Diptera: Cecidomyiidae), with a focus on the fauna of the Czech Republic, Slovakia and Denmark. A total of 19 species are recognized based on unique DNA sequences, of which…

Characteristics of the locomotor apparatus (excluding wings) and other diagnostic features of Mordellidae preserved in Eocene Baltic and Rovno amber are investigated. Main features of Eocene Mordellidae are compared with those of their extant relatives using mainly light microscopy and micro-CT…