Dung beetle (Coleoptera: Scarabaeidae: Scarabaeinae, Aphodiinae and Geotrupidae: Geotrupinae) communities provide crucial ecosystem services in a diverse range of habitats. As part of their breeding activities, dung beetles remove portions of a dung source and bury them under the soil. This behavior adds nutrients to the soil, aerates the soil, and disperses seeds. Dung beetle species are numerous in forest, prairie, savanna, and pasture ecosystems across the globe, but dung beetle communities vary across elevational gradients and habitat types. A variety of dung beetle species are native to the southeast region of the USA, yet we have limited knowledge of the life history and community assemblage of these species. Previous research on southeastern dung beetles has focused primarily on censusing the species inhabiting agricultural pasture land; bioinventories of dung beetle communities in the Appalachian Mountain regions are thus incomplete. To fill this knowledge gap, a census of dung beetles was performed in the Great Smoky Mountains National Park (North Carolina and Tennessee, USA), quantifying differences in abundance and distribution across season, habitat type, and elevation. Using pitfall traps baited with cattle dung for 24-h periods, dung beetles were collected and identified from six plots once every two weeks during April through September 2017. This research determined that communities of dung beetles varied both temporally and geographically. Low-elevation communities were more diverse than high-elevation communities, and high-elevation communities were dominated by non-native species. Population abundance peaked in late summer at both low and high elevations.

Dung beetles in the genus Onthophagus Latreille, 1802 develop horns from their pronotum or heads. The size of the horns is related to body size and follows either a linear or a distinct, polyphenic relationship. Here, we report the relationship between body size and pronotal horn size in Onthophagus hecate (Panzer, 1794), a common species native to North America. Like other species, the size relationship between pronotal width and pronotal horn was linear. For males, a longer pronotal horn is associated with more furcation and an increase in protuberances: beetles with pronotal horns < 3.65 mm had 2 protuberances, and beetles with horns > 4.27 mm had 4 protuberances. Males also displayed a prominent clypeus, which like their pronotal horn, increased linearly relative to their body size. These allometric relationships provide a baseline for further studies using O. hecate as a model for understanding the genetic and physiological mechanisms of developmental plasticity in insects.

The adults of Nearctic members of the genus Antherophagus Dejean (Coleoptera: Cryptophagidae) are diagnosed and illustrated, and a key to species is provided. The distributions of the five Nearctic species, Antherophagus convexulus LeConte, Antherophagus ochraceus Melsheimer, Antherophagus pallidivestis Casey, Antherophagus ruficornis Grouvelle, and Antherophagus suturalis Mäklin, are summarized. Host associations are also provided for A. ochraceus, A. pallidivestis, and A. suturalis. Several new state records are reported: A. pallidivestis is recorded for the first time in Idaho, Montana, and Wyoming; A. suturalis is recorded for the first time in Montana and Wyoming; A. convexulus is reported for the first time from Colorado. Many new county records are reported for A. ochraceus, A. pallidivestis, and A. suturalis. Antherophagus ochraceus subnitidus Grouvelle, 1911 is placed as incertae sedis.

In this work, the female of Scaptolenus acrognathus Champion, 1896 is described and the male is redescribed. Three new state records are provided for this Mexican endemic species, which are in the Estado de México, Querétaro, and San Luis Potosí. Photographs are provided to illustrate this species, its external characters, and the genitalia of both sexes. Generalized habitat characteristics are provided for known collection sites.

En este trabajo se describe la hembra de Scaptolenus acrognathus Champion, 1896 y se redescribe al macho. Se proporcionan tres nuevos registros estatales para esta especie endémica de México, los cuales se ubican en el Estado de México, Querétaro y San Luis Potosí. Se proporcionan fotografías para ilustrar esta especie, sus caracteres externos y los genitales de ambos sexos. Se proporcionan características de hábitat generalizadas para los sitios de colecta conocidos.

The currently known geographical distribution of Vesperoctenus flohri Bates, 1891 is reported, with new state records in Mexico, and its ecological affinities are provided. Vesperoctenus flohri is associated with medium- or high-altitude habitats, which are limited to mountainous areas of the subprovinces of El Cabo in the peninsula of Baja California and the Mexican Transition Zone (Sierra Madre Occidental, Sierra Madre Oriental, and Transmexican Volcanic Belt). In addition, we predict its potential range in high-altitude habitats in the Sierra Oriental of Oaxaca, Chiapas, and Central America. A study of the male genitalia showed a high degree of polymorphism in the tegmen, particularly in the roof and parameres.

Despite close and potentially interesting associations between pill beetles (Coleoptera: Byrrhidae) and bryophytes on which they are obligate feeders, little is known about byrrhid ecology in Canadian forests. To determine the extent to which boreal forest stands support populations of pill beetles, we established a systematic sampling grid of 200 sampling sites covering 82 km² of boreal mixedwood forest in northwestern Alberta. We found that byrrhid species, especially Simplocaria metallica (Sturm), occur in association with stands of small black spruce (Picea mariana (Mill.) BSP; Pinaceae) subject to frequent disturbances. The habitat occupied by black spruce in this part of the boreal forest also includes potential bryophyte hosts of several pill beetle species. Our findings suggest that pill beetles can be used as indicators of disturbances such as fire, harvest, gravel pit construction, and road ditching. They seem to flourish in frequently disturbed forested habitats such as peat bogs and taiga forest that provide arid environmental conditions similar to arctic or alpine environments.

The genus Cymindoidea Laporte, 1832 of subfamily Lebiinae Bonelli, 1810 is known from 15 species globally and five species from the Indian mainland. In the present study, a new species, Cymindoidea seoniensis Anagha, Sabu, and Kushwaha, new species, is described from central India. A modified key to the species of the genus Cymindoidea from the Indian subcontinent is presented.

The generic status of Xenochalepus morio (Fabricius, 1801), restored combination is re-established by its removal from the genus Pentispa Chapuis, 1875. The specific status of Pentispa bivittaticollis (Baly, 1885), restored status is restored by its removal from synonymy with X. morio. The species Pentispa larssoni Uhmann, 1957 is placed as a new junior synonym of P. bivittaticollis. The confusion surrounding these species is discussed, and a history of the names is given. Morphological characters and descriptions of the species are given.

Aleomallus yaque Rainey and Ivie, new genus and species is described from high-elevation areas in the Dominican Republic and placed in the Aleocharinae tribe Diestotini. This placement is discussed with a review of the history of the tribe and related groups. A description with figures of diagnostic characters is provided. This discovery highlights the extent of undescribed Aleocharinae biodiversity in the mountains of the West Indies.

The tumbling flower beetles (Mordellidae) comprise a large family of broad ecological interest. Many adults are commonly found on flowers and contribute to pollination, but surprisingly little is known about the larval biology of the group. Most species are thought to be saproxylic, although only a few scattered records of larval habits exist. Recent large-scale deadwood studies in the United States have reared mordellids, providing a wealth of new host records for many species. To improve the knowledge of mordellid associations with deadwood, we identified specimens previously sorted only to morphospecies to provide additional host records. We also reviewed the published deadwood associations of Mordellidae in North America north of Mexico. For this region, we report larval associations with deadwood for 29 mordellid species, of which nine are new. Larval deadwood associations are present in all three tribes and in 14 of 17 mordellid genera present in North America. This study also produced a new state record for Mordellaria borealis (LeConte, 1862) in South Carolina.

A new genus and species of Eurygeniinae: Eurygeniini (Anthicidae), Rastrogenius ambrosiaphilus Gimmel and Johnston, is described based on males and females collected from desert regions of southern California, USA. It is quite divergent within the tribe in possessing: a short, broad pronotum with no antebasal sulcus; a vertically laminate mesoventral process; the male inner protibial spur modified into a unique, rake-like organ; and a proportionally long basal piece of the aedeagal tegmen. The new genus is illustrated and compared with other genera of Eurygeniini, and a map of its geographical distribution is provided along with a checklist of all New World Eurygeniini species.

The North American members of the New World genus Eupsenius LeConte are revised, with two new species described from the United States, Eupsenius peckorum Chandler, new species and Eupsenius rileyi Chandler, new species, and with Eupsenius dilatatus Motschulsky and Eupsenius glaber LeConte being redescribed along with Eupsenius politus Reitter from the Lesser Antilles. The subtribes Eupseniina and Baradina are characterized, and the Neotropical genus Eupsenina Raffray is transferred from the Eupseniina to the Baradina.

Three new species in the tribe Bythinoplectini Schaufuss, 1890 (Staphylinidae: Pselaphinae: Euplectitae) are described from the Korean Peninsula: Zethopsus omibongensis Byeon and Park, new species, Euplectomorphus pygmaesimilis Byeon and Park, new species, and Parapyxidicerus koreanus Byeon and Park, new species. This brings the total Korean species in the tribe to four. The single species of Bythinoplectini previously known from the region, Parapyxidicerus carinatus Sawada, 1964, is redescribed. An identification key to Korean Bythinoplectini species, descriptions, habitus illustrations, diagnostic characters, a checklist, and distribution maps are provided.

The water scavenger beetle genus Notionotus Spangler, 1972 currently contains 18 described species in the Neotropical region. A recent review of museum material revealed a new species from Costa Rica, which we here describe as Notionotus hamus González-Rodríguez and Short, new species. Habitus and genitalia images are provided as well as a key to the species of the genus that occur in Central America.

Los escarabajos acuáticos detritívoros del género Notionotus Spangler, 1972 actualmente contiene 18 especies descritas para la región neotropical. Recientemente se revisó un material de museo encontrando una especie nueva de Costa Rica, la cual describimos aquí como Notionotus hamus González-Rodríguez y Short, nueva especie. Imágenes del hábito y genitalia son provistas, al igual que una clave de las especies del género que se encuentran en América Central.

Three new species are described in the extinct Cretaceous histerid genera Phasmister Caterino (Phasmister hkamticus Caterino and Yamamoto, new species and Phasmister parallelus Caterino and Yamamoto, new species) and Carinumerus Caterino (Carinumerus intricatus Caterino and Yamamoto, new species). Phasmister hkamticus represents the first histerid and the first formally described coleopteran taxon from the slightly older (ca. 110-Ma) Hkamti amber, of a different geographical and geological background from that of Kachin amber (ca. 100 Ma) also from northern Myanmar. Although we report only a single species from Hkamti amber, similarities between these two amber deposits' faunas may be implied by similarities to histerid taxa otherwise described from Kachin amber. These genera now comprise three species each, from a relatively small region, suggesting a considerable diversity in these genera and underscoring the amazing diversity of Onthophilinae in the Mesozoic.

There are over 70 species of Pachybrachis Chevrolat known from Arizona. The group hereby designated the Robust Species group, containing the largest species, consists of 14 Nearctic species: Pachybrachis ashfork Barney, Pachybrachis chaoticus Fall, Pachybrachis cylindricus Bowditch, Pachybrachis fortis Fall, Pachybrachis fuscipes Fall, Pachybrachis huachuca Barney, Pachybrachis nobilis Fall, Pachybrachis notatus Bowditch, Pachybrachis pima Barney, new species, Pachybrachis pinguescens Fall, Pachybrachis saguaro Barney, Pachybrachis sanrita Bowditch, Pachybrachis snowi Bowditch, and Pachybrachis varicolor Suffrian. Pachybrachis wenzeli Fall is synonymized under P. snowi and Pachybrachis madera Barney is synonymized under P. fortis. A key to groups of Arizona Pachybrachis species, based upon external characteristics, is provided. A key to the Robust Species is given, and a description and figure are provided for each species not previously published.

A new species of sap beetle, Urophorus (Anophorus) cordiformis Ito and Powell, new species, from Ishigaki-jima Is., the southern Ryukyu, southwestern Japan is described. A key to the Japanese species of Urophorus Murray, 1864 is also provided.

The genus Caenoscelis C. G. Thomson includes 31 species spread throughout the Palearctic realm, New World, and Ethiopia, but only a single species, Caenoscelis sibirica Reitter, has been recorded in the Korean Peninsula to this point. This study reports two additional species, Caenoscelis koreanus Shin, Park, Lee, and Park, new species and Caenoscelis ferruginea (C. R. Sahlberg), in the Korean Peninsula. Illustrations of their habitus, male genitalia, and diagnostic characters, as well as collection localities and a key to the Korean Caenoscelis species, are provided.

The Coleopterists Society Executive Council and Graduate Student Research Enhancement Award Committee congratulate the following four recipients of this year's awards. We encourage submissions from all eligible graduate student members of The Coleopterists Society. The next call for applications will go out during January 2024, with applications due 1 March 2024. Guidelines are available at: www.coleopsoc.org/society-info/prizes-and-awards/graduate-student-research-enhancement-award.