Thirty-three species of Pachybrachis Chevrolat were collected in Illinois between 1881 and 2020. A historical, or longitudinal, perspective in 20-year increments is presented for each species. The species can be subdivided into three cohorts based upon their relative consistency of collection over time. Ten species have been recovered consistently over this extended timeframe, eleven species were just found in Illinois since 1950, and twelve species (36.4%) were no longer found during the last 20 years of targeted collecting and are presumed extirpated.

Functional diversity approaches, which are based on an organism's trait pattern, are of increasing interest in ecological studies. However, there are no rules setting the number or kinds of traits that should be assessed; hence, researchers are left to make their own decisions in this regard. Moreover, in some cases, the same trait could be assessed using different procedures, making comparisons between studies potentially difficult. Such is the case of dung beetle body size. We found that it was measured by using eight different methods in the literature. Using three scarabaeine dung beetle species (Canthon quinquemaculatus Castelnau, Deltochilum komareki Balthasar, and Eurysternus parallelus Castelnau), eight methods of measuring dung beetle body size (wet weight, dry weight, wet weight × clypeal-pygidial length, clypeal-pygidial length, pronotal-pygidial length, clypeal-elytral length, pronotal-elytral length, and elytral width × pronotal-elytral length) were compared to determine if they are equivalent. Using a Spearman correlation coefficient, not all the measurement methods were found to be equivalent. Wet and dry weight were the least correlated with all other methods. Hence, to standardize measurement methods in future studies, dry body weight is suggested for use, which also has the advantage of being an easy method to use. Standardization will allow more reliable and accurate comparisons between studies.

The firefly species Photuris pensylvanica (DeGeer) has been the source of much taxonomic confusion. The species name P. pensylvanica (also P. pennsylvanica) has been applied erroneously for decades and as a result, entomological collections and publications are replete with misidentifications. In the absence of type specimens, Herbert S. Barber applied the name P. pensylvanica to the diminutive Mid-Atlantic tidal marsh-inhabiting “dot-dash” flashing species in 1951. To stabilize the genus Photuris Dejean, we made a concerted effort to locate the original type series, including the holotype, but were unsuccessful. As such, we briefly summarize the history of the taxon, accept Barber's designation, provide the first modern description of the species, designate a neotype from the proper type locality of Wilmington, Delaware, USA, and review its confirmed distribution. Thus far, the name-bearing taxon is recognized only from the freshwater tidal lowlands of the Chesapeake Bay and Delaware Bay estuaries. The species should be looked for in freshwater tidal marshes both north and south of these estuaries.

Postelichus bajaensis Barr and Shepard, new species is described and figured, and its habitat discussed. The first taxonomic key to the males of all seven species of Postelichus Nelson, 1989 is presented with images of the male genitalia. The geographic distributions of the species of Dryopidae occurring on the Baja California Peninsula of Mexico are reviewed. Helichus columbianus Brown, 1931 is reported as a new country record for Mexico and Postelichus immsi (Hinton, 1937) as a new record for Baja California.

A group of four North American dasytine species is carved from the genus Trichochrous Motschulsky, 1860. The genus Microasydates Gimmel and Mayor, new genus (type species: Pristoscelis umbratus LeConte, 1866) is created for these species. This new genus is clearly defined based on several adult male characters, including the presence of a field of coarse black setae concentrated medially on abdominal ventrite 4, slender tibial spurs in combination with the head not distinctly enlarged, lack of a basal strut on abdominal sternite VIII, tegmen membranous apically, and ventral teeth on the median lobe of the aedeagus. Species are distinguished primarily by characters of pronotal shape, setation, female pygidium, and the median lobe of the male aedeagus. Previously described are Microasydates punctipennis (LeConte, 1866), new combination and Microasydates umbratus (LeConte, 1866), new combination. Newly described are Microasydates sanclemente Gimmel and Mayor, new species and Microasydates santabarbara Gimmel and Mayor, new species. The only widespread mainland species is M. umbratus, which occurs almost throughout California across the Great Basin into Utah, while the remainder of the diversity is in the California Channel Islands and Santa Ynez Mountains in Santa Barbara County. Upon examination of type material, Trichochrous indigens Casey, 1895, Trichochrous nubilatus Casey, 1895, Trichochrous separatus Casey, 1895, Trichochrous suffusus Casey, 1895, Trichochrous testaceus Casey, 1895, and Trichochrous pratensis Blaisdell, 1924 are all considered new junior subjective synonyms of M. umbratus. Trichochrous fulvovestitus Casey, 1895, status restored, and its junior synonym, Trichochrous propinquus Casey, 1895, are removed from synonymy with M. umbratus and retained in the genus Trichochrous. Adults of Microasydates are active during mid to late summer, and aggregate, often in large numbers, on the flowers of a wide variety of mostly perennial plants, where they mate and apparently feed on pollen, nectar, and occasionally small arthropods. Seasonality data and known host plant associations are provided along with species treatments.

Eight species of Trogossitidae, three of Peltidae, and one of Lophocateridae are reported from Montana. Of these, six represent new state records. Records of Tenebroides collaris (Sturm) represent a substantial new westward range extension; supported by additional new records from Colorado, this species appears to be established in the western Great Plains.

Tytthonyx milleri Ivie, Fanti, and Ferreira, new species (Cantharidae, Tytthonyxini) is described from Miocene Dominican amber. The new species is compared with the other two described fossil taxa of the genus, as well as two additional, undescribed Dominican amber cantharid species, and their morphology is discussed. A comparison of extant and fossil Tytthonyx LeConte and Caccodes Sharp is given.

The genus Parathlibops Basilewsky, 1958 of the subfamily Scaritinae Bonelli, 1810 comprises 22 species globally, with five species known from India. Parathlibops devagiriensis Aswathi, Thomas, and Aswathi, new species is described from the Western Ghats, a global hotspot of biodiversity in southwest India, with a key to species of the genus Parathlibops from the Indian subcontinent.

We report the discovery of a new species in the recently revised genus Prespelea Park, Prespelea videns Caterino and Vásquez-Vélez, new species, from the Nantahala Mountains, North Carolina, USA. The new species has characters intermediate between two previously defined informal groups, one comprising wingless males with reduced eyes, one with apparently winged males with well-developed eyes. The new species is apparently flightless, but has moderately well-developed eyes. We assess its phylogenetic placement, using DNA and morphology, and find it to be sister to a clade comprising Prespelea myersae Caterino and Vásquez-Vélez and Prespelea enigma Caterino and Vásquez-Vélez. We provide a revised key to accommodate the new species, and offer some new distributional records for other species in the group.

By compiling all available occurrence information for the three species of Taurocerastinae (Frickius costulatus Germain, 1897, Frickius variolosus Germain, 1897, and Taurocerastes patagonicus Philippi, 1866), their realized and their world potential distributions were predicted to estimate the role played by dispersal limitations and contemporary environmental factors in explaining their extant distributions. Variables related to productivity seemed to have a higher explanatory capacity for the distribution and spatial segregation of each species. The realized and potential distribution estimates suggest that these species occupy all South American territory with environmentally suitable conditions and that the contemporary distribution of taurocerastine species can be basically conditioned by their geographical isolation within the cold and cold-temperate regions of South America. However, environmental factors would be comparatively more relevant in the case of the apterous species, T. patagonicus, due to the small potential world area with environmentally favorable conditions.

The genus Batesiana Chalumeau, 1983 (Coleoptera: Scarabaeidae: Aphodiinae: Eupariini) previously contained only the type species, Batesiana tuberculata (Bates, 1887), of which little is known. This paper describes Batesiana chamorroi Skelley and Vaz-de-Mello, new species and presents new natural history and distributional observations on B. tuberculata.

O gênero Batesiana Chalumeau, 1983 (Coleoptera: Scarabaeidae: Aphodiinae: Eupariini) anteriormente continha apenas a espécie-tipo, Batesiana tuberculata (Bates, 1887), com pouca informação disponível. O presente trabalho descreve Batesiana chamorroi Skelley e Vaz-de-Mello, nova espécie, e apresenta aobservações sobre história natural.

Dung beetles of the Scarabaeinae subfamily are an essential component of the diversity of organisms that degrade organic matter in the soil. Therefore, their diversity provides critical ecological services to different ecosystems, including agroecosystems. This study describes the fauna of dung beetles (Scarabaeidae: Scarabaeinae) that inhabit cattle ranches in two municipalities of Tabasco, Mexico. From November 2018 to October 2019, 1,400 specimens of this subfamily were collected using pitfall traps baited with cattle feces on ranches located in Tacotalpa and Centro. The most abundant species were the introduced beetles Digitonthophagus gazella (Fabricius) and Euoniticellus intermedius (Reiche). This study shows a scarce presence of roller species and notable differences in the structures of dung beetle assemblages between ranches. Additionally, this study provides a record of nine undocumented species for Tabasco, bringing the total to 27 Scarabaeinae species for the state. This study is the first formal survey to document the diversity of these insects in Tabasco, Mexico.