The genus LobetusKiesenwetter, 1852 (Coleoptera: Cantharidae) is currently weakly defined and distinguished from PseudolobetusChampion, 1915 by various combinations of secondary sexual characters of males, like modifications on antennae and forelegs, in such a way that there is no distinctive feature for Lobetus. In this paper, Lobetus is reviewed, seven new species are described (L. angustapicalis, L. bilamellatus, L. bilobatus, L. constantini, L. impressicornis, L. platycornis and L. violaceipennis) and a new identification key for males is presented. A new set of features is introduced and the conflicting morphological traits are compared among members of Lobetus and Pseudolobetus. As a result, Lobetus is synonymized with Pseudolobetussyn. nov. and its diagnosis is expanded to include the new circumscribed species. New combinations are proposed for Lobetus championi (Gorham, 1881) comb. nov., L. major (Gorham, 1881) comb. nov., and L. tibialis (Brancucci, 1981) comb. nov., and a lectotype is designated for L. lemoulti Pic, 1913. The case of the multiple original spellings Lobetus torticornis and L. torticollis is addressed, and the validity of the former name is reaffirmed. New distributional records are presented for species previously known only from their type series, representing new country records and greatly extending the distribution of the genus. The distribution of all the 23 currently valid species is summarised in a map. The validity of the characters assigned to Lobetus, the internal relationships of the species and the comparison with closely related genera are discussed based on comparative morphology, aiming to provide insights for a future systematic reassessment of Lobetus.

Eight ischaliid species new to science from China and Peninsular Malaysia are described and illustrated. Updated key to Palaearctic Ischalia Pascoe, 1860 subgenus Eupleurida Le Conte, 1862 species is presented.

A review and species key to TrictenotomaGray, 1832 (Trictenotomidae Blanchard, 1845) from the Indochina bioregion, mainland Southeast Asia, is presented for the first time. Adults of Trictenotoma childreniGray, 1832, T. davidi Deyrolle, 1875 and T. mouhoti Deyrolle, 1875 are redescribed. Trictenotoma pollockisp. nov. from southern Vietnam is described and illustrated. A lectotype is designated for T. mouhoti Deyrolle, 1875.

Records and faunistic information are provided for 96 Palaearctic species of tenebrionoid beetles of the families Aderidae, Anthicidae, Melandryidae, Mordellidae, Mycetophagidae, Oedemeridae, Prostomidae, Pyrochroidae, Tenebrionidae and Tetratomidae. The first records of Agnathus decoratus Germar, 1818, Cynaeus angustus (Le Conte, 1851), Mordella huetheri Ermisch, 1956 and Prostomis mandibularis (Fabricius, 1801) for the whole Baltic region of Europe are presented.

The Onthophagus chevrolati species complex is a putative lineage of dung beetles, which is typically found in the mountains of the Mexican Transition Zone. This species complex currently includes 13 species: O. chevrolatiHarold, 1869; O. coahuilaeZunino & Halffter, 1988; O. cochisus Brown, 1927; O. hidalgusZunino & Halffter, 1988; O. ixtepecorumsp. nov.; O. ixtlanensissp. nov.; O. longecarinatusZunino & Halffter, 1988; O. mateuisp. nov.; O. omiltemiusBates, 1889; O. potosinussp. nov.; O. retususHarold, 1869; O. sanpabloetlorumsp. nov.; and O. viridichevrolatisp. nov. The discovery of the new species hereby described is a result of the examination of specimens that have been frequently misidentified by former authors. An updated key and high quality images of the new and previously described species are provided.

A new Brazilian genus of gall midge, Cerciplanusgen. nov. Garcia and Urso-Guimarães (Diptera: Cecidomyiidae) and two new species, Cerciplanus tocantinensissp. nov. Garcia and Urso-Guimarães and Cerciplanus ciposp. nov. Garcia and Urso-Guimarães are described. The first species is inducer of leaf galls on Ouratea spectabilis (Ochnaceae) while the latter on Heteropterys sp. (Malpighiaceae). The host plants are associated with vegetation of Cerrado biome in Tocantins and rupestrian field in Minas Gerais States, both phytophysiognomies of Brazil. The new genus and the new species are described and illustrated based on immature, adults and galls. Geographical distribution of the cecidomyiid species and the host are compared and commented.

Four species of the subgenus FrendeliaCollin, 1948 of the genus MinettiaRobineau-Desvoidy, 1830 from Southwest China are described as new to science: Minettia (Frendelia) bridgensissp. nov., Minettia (Frendelia) liuisp. nov., Minettia (Frendelia) menglasp. nov. and Minettia (Frendelia) quinquevittatasp. nov. A key to the species of subgenus Frendelia in the world is presented.

A new fossil species Meunierohelea fudalaisp. nov. from Miocene Dominican amber (16 Ma) is described and illustrated. The genus Meunierohelea is known from one extant species occurring in NE Australia, four named species from Eocene Baltic amber (45 Ma), and three species from Eocene Indian amber from Cambay (53 Ma). The present record indicates that, during its phylogenetic history, this group of predatory biting midges had a broad, probably worldwide, distribution.

LeptanillaEmery, 1870 includes 47 species of strictly endogean ants, distributed through Africa, Europe, Asia and Australia, characterized by many peculiarities, such as their tiny size (between 1.0–2.5 mm long), lack of pigmentation, lack of eyes and very narrow elongate bodies. Queens are apterous and dichthadiigynes. Males have wings and eyes. Their lifestyles remain virtually unknown. The Western Mediterranean region hosts a high diversity, with 9 species in north Africa and 5 in the Iberian Peninsula. Recent sampling in Central Spain (Tortuero, Guadalajara province) led to the discovery of a colony of a large-sized Leptanilla species. This population can be assigned to L. plutonia, a species known from a single worker (the holotype) until now, easily distinguished from other Iberian species by its large size. These specimens allowed for a redescription of the species, also giving the first insights into its intraspecific variability and morphological structures not mentioned in the original description, such as the presence of a secondary labrum, large apodemes in the postpetiole or a promesosternal keel, among others. The distribution range of the species is also increased, being cited for the first time outside of the type locality. An identification key to the large-sized Leptanilla species from Western Mediterranean region is provided.