The efficiency of box traps was evaluated by release-capture laboratory experiments of Culex pipiens form molestus. The basic box trap (13L×18W×10H cm) was composed of three parts, a shading-plate, a top board, and a collection box. The shading-plate was attached to the end of the top board at a 45-degree angle. Under the shading-plate there was a rectangular opening (9×9 cm) on the top board, which connected to the collection box. The inside wall of the collection box was covered with a sticky sheet. It is suggested that the angle of the shading-plate be between 45 and 90 degrees, the size of the opening be between 9×2 cm and 9×9 cm, the top board be black or red, and the height of trap setting position be less than 80 cm from the floor to maximize the trap efficiency. When the mosquito density was low and multiple traps were placed in a room, the relationship between the overall trapping probability (Ps) and the number of traps (n) was described by the following equation: Ps=1−(1−p)ⁿ, where p is the trapping probability achieved by a single box trap in the room.

Here, a new species of mosquito, Topomyia (Suaymyia) puehensis Miyagi, Toma and Okazawa is described from Pueh, Sarawak, Malaysia. The adult male, adult female, pupa, and larva are described in detail. Illustrations of the male genitalia, female abdomen, pupa, and larva are also provided. This species is easily distinguished from all known species of the subgenus Suaymyia by the characteristic male genitalia. The larvae, which were collected individually from the leaf axils of taro aroid plants, are predacious, possessing well-developed maxillae apparently adapted for grasping prey.

To investigate the current mosquito fauna on Sado Island, we conducted surveillance in the Oosado mountainous area and the Kuninaka plain area from July 30 to August 3, 2019. In total, 20 species belonging to nine genera were collected. Among these, nine species in six genera were newly recorded on Sado Island. We also determined partial nucleotide sequences of the cytochrome c oxidase subunit I (COI) gene for 87 individuals of the 20 species and assessed the genetic divergence of their populations on Sado Island and the degree of differentiation between the Sado Island populations and those from mainland Japan or the Ryukyu Archipelagos.

From 2015 to 2020, we investigated the arthropods except psocids and micro mites inhabiting the nests of three species of swallows from six prefectures (Ibaraki, Saitama, Tokyo, Kanagawa, Nagano, and Shizuoka) in Honshu, Japan. Sixty-three nests were examined—51 for the barn swallow Hirundo rustica, and 6 each for the house martin Delichon dasypus and the house swift Apus nipalensis. More than 13 species of arthropods were found in the nests, including Oeciacus hirundinis (Hemiptera: Cimicidae), Anthocoridae gen. sp. (Hemiptera), Stenepteryx hirundinis (Diptera: Hippoboscidae), Ceratophyllus farreni chaoi (Siphonaptera: Ceratophyllidae), Ceratophyllus gallinae dilatus (Siphonaptera: Ceratophyllidae), Dermestidae gen. sp. (Coleoptera), Ptinidae gen. sp. (Coleoptera), Anobiidae gen. sp. (Coleoptera), Lepidoptera gen. sp., Argas japonicus (Acari: Argasidae), Ornithonyssus sylviarum (Acari: Macronyssidae), Dermanyssus hirundinis (Acari: Dermanyssidae), and Araneae gen. sp. Ceratophyllus gallinae dilatus and A. japonicus were collected from nests of H. rustica for the first time. Furthermore, H. rustica was recorded as a new host of S. hirundinis in Japan. The detection rates of blood-sucking arthropods in the new nests (nests built the year they were removed) and used nests (nests built on old material, and used up to the year the nest was removed) of H. rustica were compared. Ceratophyllus gallinae dilatus and A. japonicus were not collected from new nests, but were collected from used nests and there was a significant difference in the detection rates of both species from new and used nests.