Abandoned nests of social wasps are used by various arthropods, however, there are no records of cockroaches. Therefore, the objective of this study is to report the occurrence of cockroaches in abandoned social wasp nests. The first record occurred in a Cerrado area, Brazil, where a nymph (Ectobiidae) of a cockroach (Cahita Hebard, 1922) was found in an abandoned social wasp nest. The second record involved three cockroach nymphs (Blattodea: Ectobiidae), found alongside an ant Camponotus sp. (Hymenoptera: Formicidae) in an abandoned nest located in a transition area between the Atlantic Forest and Cerrado biomes. Although the exact reason for their presence cannot be defined, it is possible that the cockroaches were foraging for food or shelter from the rain. This is the first record of cockroaches occupying abandoned social wasp nests and the first record of another insect species occupying an abandoned social wasp nest alongside ants. Given the presence of Blattaria in more than one nest and in different locations and biomes, it can be suggested that this occupation is not merely incidental. However, further studies are necessary to determine the frequency of cockroach use of abandoned nests and to better understand the importance of these nests as microhabitats for these insects.

Solitary wasp nests (Sphecidae) are often occupied by other arthropods when abandoned. However, occupation by ants such as Cephalotes Latreille, 1802 is still uncertain. Species of Cephalotes are arboreal and occupy pre-existing cavities, commonly tree hollows. In this respect, the objective of this study is to report the first record of the ant Cephalotes pusillus (Klug, 1824) (Hymenoptera: Formicidae) nesting in a Sphecidae nest in areas cultivated with coffee, Coffea arabica L. The nest was collected on july 5, 2024, in a coffee plantation area in the municipality of Inconfidentes, Minas Gerais, Brazil. This area is associated with a fragment of Atlantic Forest. In the nest of Sceliphron sp. (Hymenoptera: Sphecidae), 64 pupae, 94 adults and four queens of the ant were counted. The successful occupation by the ant may have occurred due to different factors, such as the size and resistance of the nest, the size of the entrance and the multiple cells that are formed inside the nest, which allowed the use of this nest as an incubation site for the ant's larvae. This is the first record of C. pusillus nesting in a Sphecidae nest, but this species is a generalist in terms of the cavities it uses, requiring further observations to confirm the frequency of this behavior.

Social wasps (Vespidae: Polistinae) are highly adaptable insects that exploit a wide range of locally and seasonally available resources. This study reports the first observation of social wasps foraging on noni fruit (Morinda citrifolia L.) in Northeast Brazil, specifically in the Caatinga biome. Noni, a pantropical fruit known for its environmental tolerance and nutritional content, including high water and protein levels. Seven species of social wasps were recorded foraging on noni in the rural area of Patos, Paraíba state, Brazil. These species included Polybia ignobilis, Polybia occidentalis, Polybia paulista, Polybia sericea, Brachygastra lechiguana, Protonectarina sylveirae, and Polistes canadensis. Observations revealed that the wasps foraged primarily on the carpel disc of the fruit, engaging in scraping behavior to extract juices and soft tissues. No activity was observed on ripe fruits, likely due to their strong odor. The findings highlight the ecological importance of noni fruits as a resource for social wasps, particularly in arid regions as Caatinga biome where such fruits provide essential nutrients.

This study was conducted in an urban fragment of Cerrado (savannah formation) in the municipality of Campo Grande, Mato Grosso do Sul (MS), Brazil. McPhail traps, with sugarcane extract, were used along one year with the goals to sampling ulidiids flies. As results were presented new occurrences for four genera and seven species of uliidids for MS. Besides sampled four species belongs from three genera previous known from MS. The fauna of uliidids from MS increasing in 140% and 100% the number of the species and genera, respectively. Actually, the fauna of ulidiids from MS is represented by 12 species into eight genera.

Boreofairchildia Wagner & Stuckenberg, 2016 (Diptera: Psychodidae) currently includes fourteen acknowledged species. This genus is mainly found in the Neotropical region, although one species has been described from the Nearctic area. Two species are known Brazil, both from the state of Espirito Santo. In this paper, a new species from the Atlantic Forest of Espirito Santo is described, increasing the total number of Brazilian species to three and the overall species count in the genus to fifteen.

Cryptolestes obesus Thomas, 2002 (Coleoptera: Laemophloeidae) was described based on a single female specimen collected in Rondônia state, Brazil. As previously hypothesized, the robust body shape and the presence of complete secondary sublateral lines on the pronotum are diagnostic for C. obesus and fundamental traits for male association. Here we associate and describe the conspecific male, with a new record of this species for Santa Catarina state, Brazil. The habitus, antennal scape, and genitalia of the male are illustrated.