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本論文は，日本英文学会関東支部（2015年秋季大会）での口頭発表「シンポジウム「日本・原爆・英米文学」 被爆体験と「研究」 : 清水春雄について」の内容を再構成し，齋藤2017に加筆修正する形でまとめたものである．またShimizu 1946については，筑波大学比較・理論文学会年次大会（2021年2月13日）での口頭発表「“The Atomic Bomb: The Impressions of the Doomed Day, Aug. 6th., at Hiroshima” : 清水春雄のWillard C. Floyd宛書簡（1946年9月29日）について」と第63回原爆文学研究会（2021年5月2日）での口頭発表「「大和魂」対「フロンティア・スピリット」 : 清水春雄の被爆体験とアメリカ文学研究」での議論を一部利用した．

Genus Lobogynium Trägårdh, 1950 Diagnosis (adults). See Plumari and Kazemi (2012)., Published as part of Saito, Hajime, 2022, A New Species of Neolobogynium and New Records of Lobogynium sudhiri of the Mite Family Diplogyniidae (Acari: Mesostigmata: Trigynaspida) Phoretic on Some Beetles (Coleoptera: Histeridae, Synteliidae, and Geotrupidae) from Japan, pp. 329-340 in Species Diversity 27 (2) on page 330, DOI: 10.12782/specdiv.27.329, http://zenodo.org/record/7522744, {"references":["Tragardh, I. 1950. Studies on the Celaenopsidae, Diplogyniidae and Schizogyniidae (Acarina). Arkiv for zoologi, Ser. 2 1: 361 - 451.","Plumari, M. and Kazemi, S. 2012. Redescription and neotype designation of Lobogynium sudhiri (Datta) (Acari: Diplogyniidae), a mite associated with beetles of the genus Atholus (Thomson) (Coleoptera: Histeridae) in the Palaearctic region. Zootaxa 3352: 1 - 16."]}

Lobogynium sudhiri (Datta, 1985) Ophiocelaeno sudhiri Datta, 1985: 44. Lobogynium sudhiri: Plumari and Kazemi 2012: 6. Materials examined. All specimens were collected by the author at Mt. Haruka-yama, Katsuraoka-chō, Otaru-shi, Hokkaidō (43.1277°N, 141.1445°E, 168 m alt.) using chickenbaited trap and will be deposited in Systematic Entomology, Hokkaido University, Hokkaido, Japan (SEHU): one male, 25 July 2020, ex Margarinotus (Grammostethus) niponicus (Lewis, 1895) (Coleoptera: Histeridae); one female, 31 July 2020, ex M. niponicus; one male, 13 August 2020, ex M. niponicus; one female, 6 September 2020, ex M. niponicus; one male, 6 September 2020, ex Phelotrupes (Eogeotrupes) laevistriatus (Motschulsky, 1857) (Coleoptera: Geotrupidae); one female, 6 September 2020, from soil under the chicken-baited trap; one female, 17 September 2020, ex M. niponicus. Diagnosis (adults). See Plumari and Kazemi (2012). Remarks. The species L. sudhiri was first collected from cow dung in India and described as Ophiocelaeno sudhiri on the basis of one male (Datta 1985). Plumari and Kazemi (2012) redescribed the species based on specimens collected from Iran, Italy, Hungary and Slovakia. Between these specimens and the original description, some detailed differences of structure were observed. Unfortunately, the holotype of O. sudhiri had been broken and was no longer available for comparison. Plumari and Kazemi (2012) concluded that the European and Iranian species were the same species as described from India, and the discrepancies were due to inaccurate observation or depiction in the original description. As such, O. sudhiri was moved to Lobogynium with designation of a neotype and description of the female and male. In addition, Plumari and Kazemi (2012) reported an intraspecific variation of L. sudhiri in the structure of the porose areas proximal to the genital opening of the male holoventral shield; the porose area of some Iranian specimens were less differentiated and the central pore was more visible. The porose area of all three males collected in Japan and examined in this study were well differentiated hence such variation was not observed. However, the number of specimens examined might be insufficient to suggest variation. A number of specimens of L. sudhiri were collected from dung, manure, rotten plants, and beetles (Plumari and Kazemi 2012; Farahi et al. 2018). Three histerid species of the genus Atholus (Thomson, 1859), A. duodecimstriatus (Schrank, 1781), A. scutellaris (Erichson, 1834) and A. bimaculatus (Linnaeus, 1758), are preferred hosts of L. sudhiri. Moreover, only one geotrupid species Geotrupes spiniger (Marsham, 1802) is recorded as a host. The wide distribution of L. sudhiri may be caused by the distribution of host beetles. In addition, records of new host beetles, M. niponicus and P. laevistriatus, are provided here. No Atholus species were collected from the chicken traps, so the relationship between L. sudhiri and Atholus species in Japan remains unknown. It should be noted that M. niponicus and Atholus species in Japan are, to some degree, ecologically differentiated (Ôhara 1990); Atholus species prefers dung, while M. niponicus prefers decaying carcasses as confirmed by the present study. Although their habitat determination is incomplete, the association with M. niponicus implies that the range of habitat of L. sudhiri might be wider than previously considered., Published as part of Saito, Hajime, 2022, A New Species of Neolobogynium and New Records of Lobogynium sudhiri of the Mite Family Diplogyniidae (Acari: Mesostigmata: Trigynaspida) Phoretic on Some Beetles (Coleoptera: Histeridae, Synteliidae, and Geotrupidae) from Japan, pp. 329-340 in Species Diversity 27 (2) on page 330, DOI: 10.12782/specdiv.27.329, http://zenodo.org/record/7522744, {"references":["Datta, A. K. 1985. Description of Forkosclerite assamensis gen. et sp. nov. and Ophiocelaeno sudhiri sp. nov. (Acari: Mesostigmata: Diplogyniidae) from Assam, India. Indian Journal of Acarology 9: 42 - 47.","Plumari, M. and Kazemi, S. 2012. Redescription and neotype designation of Lobogynium sudhiri (Datta) (Acari: Diplogyniidae), a mite associated with beetles of the genus Atholus (Thomson) (Coleoptera: Histeridae) in the Palaearctic region. Zootaxa 3352: 1 - 16.","Farahi, S., Shishehbor, P., and Nemati A. 2018. Some mesostigmatic mites (Acari: Parasitiformes) of Khuzestan province, southwestern Iran. Persian Journal of Acarology 7: 323 - 344.","Ohara, M. 1990. [Diversity in habitats and forms of histerid beetles]. The Insectarium 27 (2): 4 - 12. [In Japanese]"]}

Genus Neolobogynium Hicks, 1957 Diagnosis (adults). Shape ovate. Dorsal shield heterotrichous, with three to five pairs of longer setae (with barbed tips) in medio-lateral and lateral series, i.e., z3, z6, Z4 (all species), Z2 [N. americanum (Banks, 1906), N. zairiensis Elsen, 1975, N. sorae sp. nov.], s4 (americanum, zairiensis, male of sorae); medio-lateral setae Z5 long; lateral setae S5 shorter than Z5 but longer than all setae of marginal series; other dorsal setae very short or vestigial. Ventri-anal shield not extending to posterior margin of idiosoma; ventri-marginal shield completely separated from ventri-anal shield and each other, with wide posterior ends meeting posterior to ventri-anal shield and one pair of setae; stigmata between coxae III and IV; peritremes long extending beyond coxa I. Sternal shield with large anterior portion, posterior margin deeply concave, postero-lateral prolongations well defined and three pairs of setae; setae st2 much closer to st1 and anterior margin than st3 and posterior margin. Separate, free metasternal shields bearing stp3 and or alveolus of st4 (states of st4 and stp3 are uncertain in N. indicum Bhattacharyya, 1969). Latigynal shields harp-shaped, with antero-lateral margins invaginated to form two lobes; two pairs of setae placed near the postero-lateral margin of shields; mesogynal shield not fused to ventri-anal shield, with posterior margin well defined. Female tectum pointed, with a pair of lateral spines; male tectum blunt-tipped, lacking lateral spines. Legs I antenniform; one long dorsal seta on genu III and IV (unknown in N. americanum)., Published as part of Saito, Hajime, 2022, A New Species of Neolobogynium and New Records of Lobogynium sudhiri of the Mite Family Diplogyniidae (Acari: Mesostigmata: Trigynaspida) Phoretic on Some Beetles (Coleoptera: Histeridae, Synteliidae, and Geotrupidae) from Japan, pp. 329-340 in Species Diversity 27 (2) on page 330, DOI: 10.12782/specdiv.27.329, http://zenodo.org/record/7522744, {"references":["Hicks, E. A. 1957. A new genus and species of the family Diplogyniidae (Acarina). Proceedings of the Iowa Academy of Science 64: 614 - 620.","Banks, N. 1906. Descriptions of some new mites. Proceedings of the Entomological Society of Washington 7: 133 - 142.","Elsen, P. 1975. Etude d'une collection de Celaenopsoidea africains (Acari: Mesostigmata). I. Famille Diplogyniidae Tragardh, 1941: descriptions de genres et d'especes nouveaux. Revue de Zoologie Africaine 89: 337 - 375.","Bhattacharyya, S. K. 1969. Studies on Indian mites (Acarina: Mesostigmata). 7. Six species found under bark in North East Frontier Agency. Zoologische Jahrbucher. Abteilung fur Systematik, Okologie und Geographie der Tiere 96: 69 - 80."]}