The larvae of three species of Toramus Grouvelle and one species of Loberoschema Reitter are described, and morphological character states of larval Toramini Sen Gupta and within Toramus are discussed. Larvae of Toramus attach their exuviae to the distal portions of their abdomen, with each exuvia from the preceding instar attached to one another to form a vertical pile. Exuvial attachment is facilitated by modified hook-like setae with flattened shafts on abdominal tergite VIII, which are inserted into the exuvia of the previous instar. These structures were examined in detail and observed that the flattened setae were broken in some specimens. Preliminary behavioral tests revealed that field-collected spiders attacked the larval body in most instances (25% attacks were on the exuvial pile), and predation success was negligible.

One hundred and fifty records of Carabidae (three subfamilies, six tribes, 16 genera, and 24 species) preyed upon by 23 species (in seven genera) of robber flies (Diptera: Asilidae) in the High Plains of eastern New Mexico and adjacent west Texas are listed. Five species of cicindelines represented 42% of all carabid records, while 19 non-cicindelines comprised 58%. Four species of ground/tiger beetles represented 66% of all records: Cicindelidia punctulata (Olivier), 22.7%; Selenophorus pedicularius Dejean, 21.3%; Cicindelidia ocellata (Klug), 11.3%; and Harpalus amputatus amputatus Say, 10.7%. These four species were preyed upon by 9, 11, five, and four species of robber flies, respectively. The top four asilid predators of Carabidae, based on percentage of total records, were Saropogon combustus Loew, 14.7%; Heteropogon patruelis (Coquillett), 14.0%; Efferia helenae (Bromley), 12.7%; and Proctacanthus milbertii Macquart, 10.0%. Twelve species of carabids are represented by only one or two records. No robber flies were identified as specialists on ground beetles; most species, notably in Efferia Coquillet, are considered generalist predators. These new records represent a significant addition to the previous knowledge of carabid prey taken by robber flies, particularly for the non-cicindelines. Asilid predation on tiger beetles may be more significant than previously thought. A review of previously published records on carabid prey taken by Asilidae is given.

OnysiusBroun, 1886, is transferred from the endemic New Zealand Chalcodryidae to Promecheilidae, reducing the number of genera of the former to two (Chalcodrya and Philpottia). Onysius shares several adult characters with Promecheilidae, including the abdominal ventrites 3 and 4 not connate and the tegmen subdivided into a basale and apicale (larvae are unknown). A key to the world genera of Promecheilidae is included.

Species of Dichelonyx Harris with a sulcate pronotum and from southern California, USA and Baja California, Mexico are treated in this paper. Dichelonyx magnesae McPeak and Lago, new species, and Dichelonyx bajaensis McPeak and Lago, new species, are described. The new species are illustrated, diagnostic characters to separate them from previously described species are discussed, and a key to “sulcate” Dichelonyx species from southern California and Baja California is presented.

Lymexylidae is a small family of beetles with worldwide distribution. Only two species are recorded from Guatemala and Mexico: Atractocerus brasiliensis Lepeletier and Audinet-Serville and Melittomma brasiliensis (Laporte). New distributional records from Guatemala and Mexico are presented for these species. A distribution map and comments about a phoretic mite interaction are provided.

A new species of ground beetle, Pelmatellus amicorum Delgado and Ruiz-Tapiador (Coleoptera: Carabidae), from the Andean Altiplano of Peru is described. The state of knowledge of the genus and the relationship of the new species with known congeneric species are reviewed.

Based upon adults reared from dead wood or galls in live branches collected in Connecticut and nearby states, I report larval hosts for 39 species of Cerambycidae in the subfamily Lamiinae. New hosts were discovered for 27 (69.2% of total) of the species. In all, 1,828 adults were reared to document 190 host associations, including 107 (56.3% of total) new ones. Astylopsis macula (Say) had the broadest host range with 28 fully identified hosts, followed by Urgleptes querci (Fitch) with 25 hosts and Hyperplatys aspersa (Say) with 13 hosts; the remaining 36 species developed in 10 or fewer hosts. Lamiine adults emerged from 70 woody species in 38 genera distributed in 23 plant families. The number of known host families for each species usually is given, along with comments about unreliable host records.

Cis okennoni Lopes-Andrade and Ferro, new species (Coleoptera: Ciidae), is described from specimens found in Texas (type locality Fort Worth Nature Center and Refuge, Tarrant Co.), Alabama, Mississippi, and Oklahoma, USA. The new species is included in the cayensis species-group, and it is unique within this group in possessing single elytral punctation, an acute outer apical angle of the protibia, and males with the anterior edge of the pronotum projected into two conspicuous horns. The only known breeding record for C. okennoni is in basidiomes of Xylobolus frustulatus (Pers.) Boidin (Russulales: Stereaceae), from which the holotype and most of the type series were collected.

A new species of FlaviellusGordon and Skelley, 2007 (Coleoptera: Scarabaeidae: Aphodiinae: Aphodiini: Aphodiina) from the Yukon, Canada is described. Flaviellus consentaneus (LeConte, 1850), new combination, is transferred from the genus Melinopterus Mulsant, 1842 based on shared character states with the new species and other species of Flaviellus.

Gymnetis pedroreyesi Ratcliffe and Nogueira, new species, is described from the state of Colima, Mexico. The description is accompanied by illustrations, a diagnosis to distinguish it from similar species, observations on natural history, and a key to the 12 Mexican species of Gymnetis MacLeay, 1819.

Megasoma lecontei Hardy is the most rarely collected of all species of Megasoma Kirby, and the female remained undescribed. A description and illustrations of the female of M. lecontei are provided for the first time based on several specimens from near Cabo San Lucas, Baja California Sur, Mexico. A revised key to the Megasoma species occurring in Baja California Sur, Mexico is presented.

Three modified atmospheres with different CO₂ concentrations (30, 40, and 50%) were tested against larvae and adults of the red flour beetle, Tribolium castaneum (Herbst), at 25 and 35 °C by using several exposure periods to detect the mortality percentages and lethal time (LT) values. The effect of CO₂ under pressure (5, 10, and 15 bars) on the target insect was also evaluated at 25 °C and two exposure periods. Larval and adult mortality of 100% after four days at 35 °C was obtained with the modified atmosphere containing 50% CO₂. The LT₅₀ for adults was 6.8 days at 30% CO₂ concentration and 25 °C and decreased to 1.8 days with 50% CO₂ concentration at 35 °C, whereas larval LT₅₀ was 3.9 and 0.8 days at the same CO₂ concentrations and temperatures, respectively. At the highest tested CO₂ concentration, significant larval sensitivity was observed after the first two days of exposure. Using CO₂ under 15 bar pressure decreased the necessary exposure period to attain 100% mortality of adults and larvae from several days at normal pressure experiment to five hours.

The larvae of the Australian endemic species Megaporus gardnerii (Clark, 1862) and M. hamatus (Clark, 1862) are described and illustrated for the first time, with detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi. We explore implications for understanding the evolution of larval morphological traits amongst selected Sternopriscina genera. A parsimony analysis based on 84 larval characteristics of seven species in five genera was conducted using the program TNT. Larvae of Megaporus Brinck are characterized by the primary seta AB3 articulated distad of seta AB2, a very elongate siphon, and predominantly elongate and hair-like secondary setae on the urogomphi. Megaporus is postulated to be closely related phylogenetically to Chostonectes Sharp in the context of this study, which reinforces previous hypotheses based on adult and molecular data sets. These results provide a phylogenetic framework for future studies of the larvae of the Sternopriscina.

We report on two lady beetle species, Oenopia conglobata (Linnaeus) and Adalia bipunctata (Linnaeus), sympatric in Chaharmahal and Bakhtiari Province, Iran, closely resembling each other in coloration. This may be an interesting example of Müllerian mimicry. The putative model, O. conglobata, retains its typical pink elytral background with 16 black spots, whereas the locally most common form (forma fasciatopunctata) of the polymorphic mimic, A. bipunctata, exhibits a similar pink background that is otherwise absent in the species. This pink coloration is achieved by a small amount of red pigments deposited over the white color of the lower layer of the elytra.

A new genus and species of Australian Pselaphinae, tribe Trichonychini, Numinbah insperatus Chandler is described from the southern border area of Queensland.

Four new species of Carpophilus Stephens, 1829 in the subgenus Ecnomorphus Motschulsky, 1858 (Coleoptera: Nitidulidae) were discovered in material from the Nearctic and Neotropical Regions. Descriptions and detailed diagnoses are provided for Carpophilus (Ecnomorphus) alexandrae Powell, new species, Carpophilus (Ecnomorphus) mellarius Powell, new species, Carpophilus (Ecnomorphus) taylori Powell, new species, and Carpophilus (Ecnomorphus) arizonicus Powell, new species.

Clambus formosanus japonicus Endrödy-Younga is reported as a new country record for the USA. Specimens were collected in Mecklenburg County, North Carolina by processing decaying grass clippings with a litter reducer followed by Winkler or Berlese funnel extraction. Specimens were also collected in Union County, North Carolina using a UV light trap. These collections increase the known fauna of Clambus Fischer von Waldheim in North America north of Mexico to 11 species. Habitus photographs and illustrations of the genitalia of C. formosanus japonicus are included. An updated key to the Clambus species of North America north of Mexico is provided.

Lady beetles (Coccinellidae) were collected and observed at 13 sites on Lanzarote, Canary Islands during 6–13 February 2018. Altogether, 887 individuals belonging to 20 species were recorded. Eleven of the recorded species are new to Lanzarote, and two of them, Olla v-nigrum (Mulsant, 1866) and Pharoscymnus flexibilis (Mulsant, 1853), probably arrived on the island recently. Taking literature data and results of this study into account, 23 species of Coccinellidae have so far been documented to occur on Lanzarote.