The exotic lance fly Lamprolonchaea smaragdi (Walker, 1849), native to the Old World, is recorded for the first time for North America from multiple specimens, present at two different locations in Los Angeles County, California over the last three years (2014–2016). This species has the potential to become a pest on crops, especially tomatoes. Observations are provided on male-dominated swarming behavior in this species.

A systematic survey was conducted to assess the diversity of Buprestidae in the tropical deciduous forest at El Limón de Cuauchichinola, municipality of Tepalcingo, Morelos State, Mexico. Samples were collected five days each month for one year, and the UAEM (CIUM) insect collection was examined for Buprestidae specimens. Four subfamilies, 12 tribes, 19 genera and 73 species were recorded, with the genera Agrilus Curtis, 1825, Chrysobothris Eschscholtz, 1829, and Acmaeodera Eschscholtz, 1829 having the greatest number of species. Nonparametric estimator analysis estimates that only 68% of buprestid species occurring in the forest were recorded. The annual value of diversity calculated with the Shannon-Wiener index was 3.08. Maximum diversity and evenness values were recorded during the rainy season. Maximum richness and abundance values were recorded during July and August, the months with the highest amount of rainfall, and correlated with rainfall 78% and 72%, respectively.

A taxonomic study of the coastal genus Halorhadinus Sawada, 1971 in Korea is presented. Five species, including a new species, Halorhadinus koreanus sp. nov., are recognized. Three species, H. aequalis Sawada, 1971, H. masakazui Ono & Maruyama, 2014, and H. satoi Ono & Maruyama, 2014, are new to the Korean fauna. A key and a comparison of morphological features of Korean Halorhadinus species with illustrations of diagnostic characters are provided.

The first cases of gynandromorphy in the non-biting midge genus Polypedilum Kieffer, 1912 (Diptera: Chironomidae) are reported. Gynandromorphs of two species, P. (Tripodura) unifascium (Tokunaga, 1938) and P. (Uresipedilum) bingoparadoxum Kawai, Inoue & Imabayashi, 1998, from China are described and illustrated. They were determined through comparison of mitochondrial cytochrome c oxidase subunit 1 DNA barcodes with those of determined Polypedilum adult males. Occurrence of gynandromorphs, which have a feminine head, thorax and abdomen, but a masculine hypopygium, in the Chironomidae is discussed.