Three uncommon species of the genus Cheiracanthium C. L. Koch, 1839 (C. adjacensoides Song, Chen & Hou, 1990, C. insigne O. Pickard-Cambridge, 1874 and C. iranicum Esyunin & Zamani, 2020) are recorded for the first time from the western India. Further, we confirm the occurrence of C. adjacensoides from India by recognizing the report of C. approximatum from Punjab (Marusik et al 2020) as C. adjacensoides. Our records of these three species from Gujarat contribute new and expanded distributional data for the Indian cheiracanthiid fauna and emphasize the biogeographical significance of western India. A short morphological description and photographic illustrations of the male habitus and copulatory organs are provided along with an updated distribution map.

Emamectin benzoate and chlorantraniliprole showed high control activity against adults of Spodoptera frugiperda (Lepidoptera: Noctuidae). The LC20 and LC50 values for emamectin benzoate were 0.026 and 0.09 ppm, respectively. Similarly, LC20 and LC50 values for chlorantraniliprole were 0.589 ppm and 1.541 ppm, respectively. The fecundity, adult longevity and egg hatching rate in the LC50(♀) × LC50(♂) treatments of S. frugiperda were significantly reduced compared with the control. On exposing the adults to sublethal concentrations of emamectin benzoate and chlorantraniliprole by spraying on different days, a slight decrease in fecundity was observed when the adults were exposed on the sprayed day. Shortened male and female longevity were observed in LC20(♀) × LC20(♂) (LC20, adults released on the day of spray). These results revealed that sublethal doses of emamectin benzoate and chlorantraniliprole negatively affected the development and biological activities of S. frugiperda.

Between January and March 2023 and again between February and May 2024, craneflies (Diptera: Tipulidae) were collected by hand or net from Lawrence County, Arkansas, McCurtain County, Oklahoma, and Lamar and Upshur counties, Texas. Six new state distributional records are documented for several species of tipulids from these three southern states.

Beetles in the genus Copris (Coleoptera: Scarabaeidae) are coprophagous insects colloquially referred to as ″tunnelers″ due to their behavior of creating channels in feces. These beetles utilize dead organisms and non-living organic matter as food sources, playing a vital role in nutrient cycling and contributing to the survival of other organisms in their ecosystem. To date, no studies have investigated the hindgut in Copris. This study aims to detail the histomorphological structure of the hindgut of Copris felschei Reitter, 1892 (Coleoptera: Scarabaeidae) using light and scanning electron microscopy. The alimentary canal in Coleoptera generally consists of three main sections: the foregut, midgut and hindgut, with C. felschei′s hindgut primarily comprising the ileum, colon and rectum. The anatomical and histological characteristics of the ileum and colon are almost similar, covered by the Malpighian tubules′ distal ends. Scanning electron microscopy images (SEM) revealed a significant presence of muscle tissue surrounding the ileum and colon surfaces. Their epithelium is cylindrical, featuring visible oval nuclei bordered by a thin cuticle. The rectum connects the colon to the anus and is surrounded by intima, a single layer of squamous epithelium, and a thick muscle layer. These findings are expected to enhance our understanding of the alimentary canal in Coleoptera including Scarabaeidae and contribute to future research.

The Carabidae (Coleoptera) is a large and diverse family of predatory and herbivorous beetles. Previously, 206 species (including Cicindelidae) were known to occur in Delaware. Eighteen new state records have been discovered in the University of Delaware Insect Research Collection, and one confirmation of a doubtful record. State records are listed along with the label data for each voucher specimen. This study increases our understanding of the biodiversity of Carabidae in Delaware and brings the total species count to 226.

Aquatic insects constitute the richest and most diverse component of river communities, but while taxonomic knowledge has increased enormously, many aspects of their ecology remain unknown. Studying aquatic insects' trophic ecology can be useful in order to better understand not only their diet, but also ecosystem functioning and biogeochemical processes. Furthermore, looking at the apical predators present in a specific environment is of utmost importance, especially in those fishless habitats where aquatic insects, such as stonefly nymphs, are at the apex of the trophic web. Herein, we report our findings regarding diet selection implemented by the Plecoptera Systellognatha Perla grandis in a glacial alpine lotic system. Obtained results suggest that: i) fine organic matter (FPOM) can be frequently found in examined gut contents, ii) some prey are actively selected and iii) age-related prey selection shift can be observed.

A new genus and species of delphacid, Athenidelphax kennedyae, new gen. & sp. (Delphacinae, Delphacini), is described from Cartago Province in Costa Rica. Available specimens are all brachypterous. An updated checklist of the delphacid species from Costa Rica (including taxa reported only to genus) is provided. The new species is the 35th genus and 62nd species of Delphacidae recorded from Costa Rica. Based on evidence from iNaturalist, COI barcode data, and available specimens, the true delphacid biodiversity for Costa Rica is suggested to be approximately 150 species.