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Revision of the subgenus Mesopraocis Flores & Pizarro-Araya of the Neotropical genus Praocis Eschscholtz (Coleoptera, Tenebrionidae, Pimeliinae)Artículo de revistaThe second part of a revision of the species of the genus Praocis Eschscholtz is presented. The subgenus Mesopraocis Flores & Pizarro-Araya, distributed in northern Chile from 25° South to 31° South, is revised. This article includes a redescription of the subgenus, redescriptions of its species, an identification key, and a discussion on morphological adaptations of the species to fossorial life. Habitus photographs, scanning electron micrographs of head, antennae, prosternum, abdomen, and protibiae, illustrations of genital features, and distribution maps are presented. Conical pegs sensilla on tibiae are described and illustrated using SEM for the first time for a South American tenebrionid species. A new Praocis species is described: Praocis (Mesopraocis) arenicola sp. nov. Praocis (Mesopraocis) flava Kulzer, 1958 is synonymised with P. (M.) pilula Laporte, 1840. Other species of the subgenus are: P. (M.) calderana Kulzer and P. (M.) nitens Kulzer. A statement on the variation in the number of antennomeres in P. (M.) pilula is appended. Conservation efforts in need of survey improvement in epigean beetles from the Atacama coast, ChileArtículo de revistaThe Atacama desert's southern margin includes a poorly explored area of high biotic value with natural areas that are crucial for diversity and conservation. We used pitfall traps to study epigean beetles across 17 sites located along the coast between the Paposo Norte Natural Monument and the Paposo Priority Site. We recorded a total of 3,237 epigean beetles specimens, belonging to 26 families and 97 species. The most well represented families in terms of richness were Curculionidae and Tenebrionidae, and most of the remaining families were represented by fewer than five species. The rarefaction analysis showed that the sampling effort was low, suggesting the presence of a hidden and underestimated diversity in the area under study. The ordination analysis showed a clear correlation between elevation and the epigean beetles assemblage, but richness was concentrated in shrubland environments within the Paposo Priority Site and consisted of a large number of rare species (singletons) and species restricted to a few sites of this coastal strip. The high richness estimated for the study area, stress an urgent need to include these units under governmental conservation programs aimed at tackling the multiple threats identified in these fragile arid coastal ecosystems.