We investigated the genetic divergence and population structure of the flightless supralittoral weevil, Aphela gotoi (CHUJO et Voss, 1960). A 598-bp fragment of the mitochondrial COi gene was sequenced from 32 specimens representing seven distinct populations in coastal areas of Honshu and Shikoku, Japan. Our molecular analyses revealed the existence of two major, geographically isolated lineages within A. gotoi, suggesting that gene flow in this species has been inhibited by the Japanese archipelago between the Sea of Japan and the Pacific Ocean.

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A new species of the deltocephaline genus Parabolopona is described and figured from the Central Ryukyus, Japan.

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This is the second part of a revisional study on the genus Hoploedipinus KASZAB. Eight new species, Hoploedipinus merkli sp. nov., H. yokoii sp. nov., H. yoroi sp. nov., H. kaniei sp. nov., H. benomensis sp. nov., H. perakensis sp. nov., H. balkei sp. nov., H. tanahrataensis sp. nov., and a new combination, H. andoi (MASUMOTO et AKITA, 2010) comb. nov., are proposed. Key to species of the genus is provided.

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Namtokocoris kem SITES has been recorded from Vietnam (central area) and Thailand (northern area), and is firstly recorded from North Vietnam. This is the northernmost record of the genus.

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Asian genera of Petrognathini are reviewed and illustrated with a key. The genus Parajoesse BREUNING, 1982 is synonymized with the genus Pseudapriona BREUNING, 1936, and Parajoesse nagaensis BREUNING, 1982 is synonymized with Pseudapriona jlavoantennata BREUNING, 1936. Ioesse rubra Pie, 1925 is reinstated from a synonym of Ioesse sanguinolenta THOMSON, 1864. Ioesse putaoensis sp. nov. is described as the third species of the genus from North Myanmar.

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Darumazo distinctus MORIMOTO et MIYAKAWA has been collected from several localities in Japan but its bionomics was unknown. We found three adults of D. distinctus from axillary bud galls induced by Asteralobia sasakii (MONZEN) on Ilex crenata var. hachijoensis on Oshima and Hachijojima Islands, Tokyo, Japan.

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Ogasawarazo daitoensis Voss was rediscovered 48 years after the first collection on both Kitadaito- and Minamidaito-jima Islands, the Daito Islands, southwest Japan. Some biological information is provided for the first time with suggestion of the urgent survey necessity for conservation.

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Metapocyrtus (Trachycyrtus) hederaephilus YOSHITAKE, sp. nov., is described from Mie Prefecture, Central Honshu, Japan. In addition to general taxonomic information, DNA barcodes were provided from four individuals of the new species. This species occurred suddenly in a farm of ornamental plants in Mie Prefecture and caused serious damages to the English ivy, Hedera helix (Araliaceae). The larvae feed on roots while the adults feed on leaves above ground. This species may not be native to Japan but an invasive species from the Philippines, though the invasion route of this species to the country is unclear.

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This is the first part of the taxonomic study on the species group of S. cephalotes SHARP of the genus Stenus LATREILLE, 1797. First, eleven species groups of Stenus that I created in 1988 to 1990 and their related problems are discussed. Second, the species group of S. cephalotes, together with its diagnostic characters and component species are discussed in detail. Eight species (i.e., S. bosatsu NAOMI; S. hagoromo NAOMI; S. intermixtus PUTHZ; S. uneme NAOMI; S. hime NAOMI et PUTHZ; S. kajika NAOMI et PUTHZ; S. satsuki NAOMI et PUTHZ; and S. hotei NAOMI), which have hitherto been regarded as members of the subgenus Hemistenus under a traditional classification of Stenus, are here all considered to belong to the species group of S. cephalotes. Third, ten known species are redescribed in detail; and six new species are described from Japan as follows: S. matobai from Wakayama Pref; S. coffeatus from Kochi Pref; S. hoshinai from Ishikawa Pref; S. ferus from Mie Pref; S. acutatus from Mie Pref; and S. jamesashei from Shiga Pref.

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Two new species of the genus Phallosphaera ROHDENDORF, 1938, P. barioensis sp nov. and P. amicoides sp. nov. are described and keyed. They possess a protuberance on 5th stemite in male, which is a synapomorphic character for considering Phallosphaera as a monophyletic genus. The male genitalia show these two new species closely allied to P. gravelyi (SENIOR-WHITE, 1924) and P. amica MA, 1964, respectively.

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Four Dicranolaius and eight Intybia species have been discovered from Borneo, and a new Dicranolaius species, Dicranolaius takizawai n. sp. is described, and Intybia basimaculata WITTMER is transferred to Dicranolaius CHAMPION. A key to Bornean species of these genera is also given.

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A new staphylinid genus is established under the name of Nipponolathrobium for the group of Lathrobium yozawanum. The members of this new genus are distinctive in configuration of head which is narrowed posteriad, vestigial eyes and abdomen provided with a short though remarkable longitudinal carina at the middle of base in each tergite and stemite from 3rd to 7th segments. Besides, two new species belonging to the new genus are described under the names N. moritai and N. iyaense. The former was obtained at the Sanpuku Pass on the Southern Japanese Alps in central Honshu, and the latter was found in the upper hypogean zone at eastern Shikoku, Japan.

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Cneorella spuria (GRESSITT & KIMOTO, 1963) and C. eurycollis (CHUJO, 1965) are redecribed. So-called C. spuria in Taiwan is found as a distinct species by compared with true C. spuria. Thus Cneorella eurycollis become valid since it is only available name for Taiwan population of C. spuria. Its distribution and plant associations are provided.

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Twelve new species of the genus Strongylium KIRBY from Laos are described under the following names: Strongylium bolikhamsaiense sp. nov.; S. laocrurale sp. nov.; S. khammouanense sp. nov.; S. strbahergovitsorum sp. nov.; S. phonsavanense sp. nov.; S. norikoae sp. nov.; S. namthaense sp. nov.; S. holzschuhi sp. nov.; S. nakaiense sp. nov.; S. phousamsounense sp. nov.; S. phoutonmonense sp. nov.; S. khasinamtaoon sp. nov.

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Arge cerasus SHINOHARA and HARA, n. sp., is described from Hokkaido and Honshu, Japan. The adults are well characterized by the brown-marked clypeus, pale brown antenna! flagellum, black-banded forewing and basally whitish hind tibia in both sexes and the basally whitish hind femur in the female. The larvae are gregarious leaf-feeders on Cerasus max:imowiczii and C. nipponica var. kurilensis (Rosaceae) and the late instar larvae are recognized by the entirely black head and thoracic legs and largely black dorsum of the tenth abdominal segment. Arge cerasus probably has two or three generations a year. Cerasus max:imowiczii is recorded as a new host for Spinarge prunivora HARA and SHINOHARA, 2006.

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Heterarthrus fasciatus (MALAISE, 1931) is redescribed based on the holotype from Kamchatka and additional specimens reared from larvae leaf-mining Populus nigra L. and P. suaveolens FISH. in Hokkaido, Japan. This species is new to Japan, and its host plant was unknown. The larva and life history are also described.

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Two new species, Paralimosina submaculipennis and P. vietnamensis, are described and illustrated as new to science, and 7 species, Paralimosina albipes HAYASHI, P. altimontana (ROHACEK), P. bracteata ROHACEK et PAPP, P. conjusa HAYASHI, P. longitricha Hayashi, P. marshalli ROHACEK et PAPP and P. undulata HAYASHI are newly recorded from Vietnam. This genus is recorded from Vietnam for the first time.

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