The present study was conducted to determine the species composition of the family Coccinellidae (Coleoptera) in the tropical deciduous forest of Huautla, Morelos, Mexico in the south-central part of the Sierra de Huautla Biosphere Reserve (REBIOSH) during the period 2018–2019. Richness and abundance were quantified, and the expected richness was calculated with estimators. A total of 1,743 specimens belonging to two subfamilies, 12 tribes, 25 genera, and 52 species were recorded. The rainy season, particularly in August, was the most diverse, while the most abundant month was March (dry season). Several new state records for Morelos were found: Scymnobius flavifrons (Melsheimer), Scymnobius sordidus (Horn), Scymnus (Pullus) bryanti Gordon, Scymnus (Pullus) dozieri Gordon, Scymnus (Pullus) enochrus Gordon, Scymnus (Pullus) fraternus LeConte, Scymnus (Pullus) gilae Gordon, Brachiacantha indubitabilis Crotch, Brachiacantha quadrillum LeConte, Hyperaspis conspirans Casey, Hyperaspis globula Casey, Thalassa montezumae Mulsant, Diomus texanus Gordon, Paraneda viridescens Timberlake, Psyllobora renifer Casey. The following are reported additionally as new country records for Mexico: Scymnus (Pullus) mimoides Gordon, Calloeneis angelica Gordon and Hanley, Hyperaspis dobzhanskyi Gordon, Hyperaspis esclavium Dobzhansky, Hyperaspis oculifera Casey, Decadiomus austrinus (Gordon).

Four new species of ant-loving beetles are described from the Shennongjia Forestry District, Hubei, China, namely Arthromelodes splendidus Yin, new species, Batriscenaulax? shennongjia Yin, new species, Batrisiella crassa Yin, new species, and Batrisiella promunturium Yin, new species, which represent the first records of the tribe Batrisini from this region. The habitus and diagnostic characters of these species are illustrated, and an identification key is provided.

Prompted by a forthcoming treatment of the Melyridae of the United States and Canada at the genus level, we implement a number of taxonomic and nomenclatural changes among the fauna of Dasytinae of the North American continent and beyond. Chief among them are 21 new junior synonyms proposed at the genus level, leading to better characterized genera for purposes of diagnosis, supported by a recently published molecular phylogeny: Byturosomus Motschulsky, 1860, Emmenotarsus Motschulsky, 1860, Holomallus Gorham, 1886, Adasytes Casey, 1895, Cradytes Casey, 1895, Eudasytes Casey, 1895, Sydates Casey, 1895, Sydatopsis Casey, 1895, Listropsis Blaisdell, 1924, Eutrichopleurus Blaisdell, 1938, Trichochroides Blaisdell, 1938, and Trichochronellus Blaisdell, 1938 (all new junior synonyms of Trichochrous Motschulsky, 1860); Dasytellus Casey, 1895, Hoppingiana Blaisdell, 1924, Neadasytes Hatch, 1962, Paradasytes Hatch, 1962, and Apovates Majer, 1986 (all new junior synonyms of Dasytastes Casey, 1895); Leptovectura Casey, 1895, Listromimus Casey, 1895, Vecturoides Fall, 1930, and Menovectura Blaisdell, 1931 (all new junior synonyms of Vectura Casey, 1895). The generic synonymies result in new or restored combinations for 52 species. Additionally, among the North American (including Mesoamerican) fauna, nine species are transferred from Trichochrous to Eutricholistra Blaisdell, 1924; 15 species from Trichochrous to Pseudasydates Blaisdell, 1938; one species from Dasytes Paykull, 1799 to Amphivectura Blaisdell, 1938; 20 species and subspecies from Dasytes and two species from Listrus Motschulsky, 1860 to Dasytastes. One junior secondary homonym created as a result of the synonymy of Listropsis with Trichochrous is here renamed Trichochrous rugosicollis Gimmel and Mayor, new name (= Trichochroides parvicollis Blaisdell, 1941). At the species level, 35 new junior synonyms within Trichochrous, four new junior synonyms within Pseudasydates, and two new junior synonyms within Vectura are proposed to reduce the burden of valid species names and provide a clearer picture of the fauna. Dasytes brevicornis LeConte, 1852 is designated as the type species of Emmenotarsus. Confusion around the type species designation of Byturosomus is clarified; a lectotype is designated for Dasytes fusca LeConte, 1852 which we also designate as a neotype for Byturosomus rufipes Motschulsky, 1860. In addition, we propose a revised tribal-level classification based on morphological study and a recent molecular phylogeny, recognizing six world tribes: Eparchiini Bernhauer, 1934, status restored, originally described in Staphylinidae; Vecturini Gimmel and Mayor, new tribe (type genus: Vectura); Danaceini Thomson, 1859, new sense; Chaetomalachiini Majer, 1987; Listrini Majer, 1990, new sense; and Dasytini Laporte, 1840, new sense. Additionally, we re-synonymize the tribe Enicopodini Escalera, 1927, junior synonym restored, with Dasytini. Among non-North American taxa, Pedicanthus Mayor, new name is proposed for the junior homonym Arthracanthus Broun, 1883, resulting in new combinations for five New Zealand species. In a reversal of priority, the Chilean Hylodanacaea ruficeps (Pic, 1910), new combination has validity over Hylodanacaea immarginatus (Pic, 1926), new junior synonym. Two South African species are transferred from Dasytes Paykull, 1799 to Pseudopecteropus Pic, 1903. Two South American species are transferred from Dasytes to Astylus Laporte, 1838 (Melyrinae: Astylini), while two varietal names are proposed as new junior synonyms of Astylus bifurcatus (Pic, 1910), new combination. Finally, we provide a key to world tribes and an updated species-level checklist of New World Dasytinae with published country-level distribution for all species as well as state- and province-level distribution for species occurring in Canada, USA, and Mexico.

Polygraphus proximus Blandford (Coleoptera: Curculionidae: Scolytinae) is a nonaggressive phloem-feeding bark beetle native to East Asia. It has invaded European Russia and Western Siberia and is causing widespread fir forest mortality. However, little is known about host preference in its native range especially during endemic population phases. Thus, a field choice experiment was conducted at a study site where the P. proximus population phase was endemic to determine its host preference among four Abies Mill. (Pinaceae) species native to Japan [Abies firma Sieb. & Zucc., Abies homolepis Sieb. & Zucc., Abies sachalinensis (F. Schmidt) Mast., and Abies veitchii Lindl.]. This present study revealed that P. proximus preferred one of the study site's native host species, A. veitchii, whereas one of the study site's exotic host species, A. firma, was one of the least preferred species. Statistical analyses revealed a significant difference in host preference between the previous study conducted during the epidemic phase and the present study, suggesting that the beetle's population phases may influence their host preferences. The present study also suggests that an extended host preference during the epidemic population phase in P. proximus can cause extensive forest damage with further range expansions.

A new species of spider beetle in the genus Dignomus Wollaston from Thailand is described. This record represents a significant range extension of over 2,000 km to the east for species of this genus. The new species, Dignomus arlai Philips and Smith, new species, is diagnosed, described, illustrated, and its placement in the Dignomus aethiopicus (Ancey) species group is discussed. A map showing the known distribution of species within the genus is also provided.

We conducted a study to evaluate the utility of geometric morphometrics (GMM) using landmarks and semi-landmarks of the wings of beetles in the subfamily Bruchinae, focusing on a diversity of genera and including those most likely to be intercepted in agricultural shipments. Our results show promise for the value of hind wing landmarks (mostly veins and vein intersections) as well as semi-landmarks of the elytra (contour, shape). Geometric morphometric analysis of the landmarks of the hind wings and semi-landmarks of the elytra show differences in shape among the sampled genera of beetles. Principal component analysis demonstrated that the hind wing shapes of the males from different genera were distinctive in the morphospace, and discriminant function and canonical variate analyses showed differences in the shapes of the hind wings and elytra between the different genera, particularly between the genus Acanthoscelides Schilsky and the other genera. The results of our study show the potential of GMM for the identification of hard-to-identify taxa based on traditional taxonomy (external morphology), in particular on morphologically conservative taxa, species complexes, or taxa that are similar due to convergence.

A short synopsis is given for the Central and South American genus Deinocladus Blake, 1966, including species diagnoses and information on distribution. Deinocladus ellieae Moulton and Clark, new species from Bolivia is described and illustrated. A dichotomous key is provided to facilitate identification of the four known species of the genus.