A complete, annotated checklist of the ant-like flower beetles (Coleoptera: Anthicidae) recorded in Madagascar is provided for the first time. The list comprises 117 species and subspecies. The following seven species new to science are described and illustrated: Macratria durrelli sp. nov., Nitorus antankarana sp. nov., N. caviculus sp. nov., N. ciliatus sp. nov., N. saxatilis sp. nov., N. tsingy sp. nov., and Telesinus discolor sp. nov. Two new combinations are made: Nitorus caligans (Bonadona, 1958) comb. nov. and N. maculatus (Bonadona, 1958) comb. nov. (both from Pseudoleptaleus Pic, 1900). Original combination is restored for Leptaleus brevior Fairmaire, 1897. The following three new synonyms are introduced based on the examined type material: Anthicus atricornis Pic, 1913 = A. rudebecki Bonadona in van Hille, 1961 syn. nov. = A. meruanus Buck, 1965 syn. nov.; Macratria testaceilabris Pic, 1940 = M. testaceilabris var. sikorai Pic, 1940 syn. nov. Nineteen species are rediscovered after a long period of absent records. Colour images are provided for the first time for adults of several Madagascan taxa. New faunistic records of 52 taxa and results of a brief biogeographic assessment are presented. The calculated endemism rate in the Madagascan Anthicidae species and subspecies ranks taxa exceeds 80%, in genus rank taxa – 8%.

Immature stages of Cassida japana Baly, 1874 and Cassida piperata Hope, 1842 are described and illustrated in detail for the first time and compared to each other. The analysis of the morphological body structure of the preimaginal stages of the studied species revealed subtle characteristics distinguishing C. japana from C. piperata, confirming their species status. This was further supported by DNA barcode data and host plant specificity.

In the present paper, Androsus arfakianus, A. marind and A. talise spp. nov., new darkling beetles species from the subfamily Stenochiinae W. Kirby, 1837, are described and illustrated. Two new synonyms are introduced: A. violaceus (Pascoe, 1887) = A. violaceus fulgens Gebien, 1921 syn. nov. = A. pommeranicus Kaszab, 1939 syn. nov. First records of the genus Androsus Gebien, 1921 from the Solomon Archipelago and the Arfak Mountains of New Guinea's Doberai Peninsula are presented. A brief discussion on the taxonomy and morphological features of Androsus Gebien, 1921 species from the Papuan Region and Wallacea is provided supplemented with an annotated checklist and a historical overview. The genus Pseudandrosus Kulzer, 1951 syn. nov. is placed as a junior synonym to Sciophagus Sharp, 1885 based on the erroneously selected type species and a subsequent new combination. The taxonomic position of Eucyrtus neomidinus Fairmaire, 1893 in the genus Eucyrtus Lacordaire, 1859 is confirmed.

This comprehensive study examines the range and ecological interactions of Brachyponera sennaarensis (Mayr, 1862), a ponerine ant prevalent in sub-Saharan Africa and the Arabian Peninsula. Understanding the distribution patterns of ants is vital to developing sound long-term management strategies, as ants are critically involved in terrestrial ecosystems. This study employed species distribution modelling (SDM) via Maxent to forecast the present and future distributions of B. sennaarensis under two climate change scenarios: RCP 2.6, indicative of a climate change mitigation pathway, and RCP 8.5, denoting a high-emission scenario, for the years 2050 and 2070. The research utilized occurrence data from digital sources, implementing stringent filtration methods to guarantee data integrity. Crucial bioclimatic characteristics, such as annual mean temperature, mean diurnal range, minimum temperature of the coldest month, annual precipitation, and precipitation during the wettest quarter were recognized as key indicators of habitat compatibility. The findings demonstrate that the performance of the model is statistically dependable, as evidenced by an AUC value of 0.81 and a TSS value of 0.7. Our research predicts possible range changes and habitat degradation, especially in East Africa and the Horn of Africa, under the RCP 8.5 scenario, where rising temperatures and modified precipitation patterns may threaten the viability of this species. In contrast, the RCP 2.6 scenario indicates a slight northward extension of appropriate habitats in West Africa and the Sahel, underscoring the resilience of B. sennaarensis in more favorable climatic circumstances. This research highlights the significance of comprehending the ecological needs of B. sennaarensis in the context of climate change. It necessitates aggressive management strategies to alleviate the effects of climate change on this species and its habitats. The findings offer essential information for policymakers and management programs.

The genus Macroteleia Westwood, 1835 (Hymenoptera: Scelionidae) is reported for the first time in the Arabian Peninsula (Saudi Arabia) and Jordan. Four species are recognized based on 34 examined specimens collected from Al-Baha, Al-Jouf, Asir and Jazan regions (Saudi Arabia) and north of Dead Sea on the eastern coast (Jordan): Macroteleia rufa Szelényi, M. stabilis Nixon, M. arabica Gadallah and Soliman sp. nov., M. nigriceps Soliman and Gadallah sp. nov. The last two are described and illustrated as new species. An illustrated key and a distribution map of species are provided. A faunistic list and taxonomic notes are also provided for each species.

Hadromychus is the only New World genus of the subfamily Danascelinae, endemic to North America, with a single described species – Hadromychus chandleri Bousquet and Leschen. We describe a second species, Hadromychus lawrencei sp. nov. from the western USA and Canada and redescribe H. chandleri. Images of external and internal characters are provided, including the first for female H. chandleri.

Pachymesia Westwood (1849) and Incisosilis Pic, 1908 are small Neotropical genera of Silinae distinguished by subtle morphological differences in males. They include, respectively, two species and four species and one subspecies recorded from the Atlantic Forest of Brazil and Guatemala. Here, both genera are revised and Incisosilis is regarded as a new synonym of Pachymesia, new combinations are proposed, the subspecies is elevated to species rank, and nine species are described as new, comprising 16 valid species in total: Pachymesia incisa Westwood, 1849, P. testaceicornis Pic, 1908, P. latipennis (Pic, 1908) comb. nov., P. distinctithorax (Pic, 1908) comb. nov., P. pallida (Pic, 1912) comb. nov., P. subacuminata (Pic, 1912) comb. nov., P. subopaca (Pic, 1913) comb. nov., P. inspinosa sp. nov., P. terminalis sp. nov., P. laeta sp. nov., P. constricticornis sp. nov., P. singulariventris sp. nov., P. emarginata sp. nov., P. lawrencei sp. nov., P. fuscohumeralis sp. nov. and P. laranjensis sp. nov. The genus is recorded for the first time in Argentina (Misiones province) and the unreliable record from Guatemala is corrected to Espírito Santo state in Brazil based on the study of additional specimens. All the species are described and illustrated; photographs and drawings are given for all the species and their diagnostic features; the wing and genitalia of males and females of Pachymesia are illustrated for the first time. The morphology of the genital segments and genitalia of males are reinterpretated and a new terminology for the structures is proposed. The unusual morphology of the abdomens of males and females is suggested as having a role in the reversed copulatory courtship displayed by some Silinae. Pachymesia is broadly distributed in the Atlantic Forest of Brazil and Argentina though unevenly sampled through this biome, suggesting the diversity of the genus is still far from being fully known.

Two new species of the genus Lebia (s.l.) Latreille, 1802 are described: Lebia akinobuella Kirichenko-Babko, Kopeć et Krzemiński sp. nov., and Lebia baehri Kirichenko-Babko et Perkovsky sp. nov., from Baltic and Rovno ambers, respectively. Both described species belong to the subtribe Lebiina Bonelli, 1810, and exhibit similar morphological characters to representatives of the genus Lebia (s.l.). Illustrations are provided and the morphological characters of these fossil species and extant species from the subgenera of Lebia is discussed. The presence of aposematic coloration preserved in the two new fossil Lebia species is discussed and tentatively considered as an anti-predator strategy.