RecordsofEucurtiopsisohtaniifrom Japan 85 (51):1(cid:2)283. (cid:3)(cid:3)(cid:3)(cid:3) 1999. A revision of the superfamilyHisteroidea ofJapan (Coleoptera). Supplementum1.Ibid., (55):75(cid:2)122. S6L696, K., 1994. New myrmecophilous Coleoptera in Nepal and Japan (Histeridae & Staphylinidae). Contr.Biol.Lab.KyotoUniv.,28:357(cid:2)365. Y6B6BDID,S.,2008. AdditionalrecordofEucurtiopsisohtanii(Coleoptera,Histeridae,Chlamydopsinae) fromKyushu,Japan.Elytra,Tokyo,36:240. Elytra,Tokyo,38(1):85(cid:2)86,May31,2010 Observation of the Respiratory Strategy of Neohydrocoptus bivittis (Coleoptera, Noteridae) Yuta KUDO and Hiroaki KOJIMA LaboratoryofEntomology,TokyoUniversityofAgriculture, 1737Funako,Atsugi,Kanagawa,243(cid:2)0034Japan Somenoteridlarvaehavebeenknowntoextractoxygenfromwaterplantsbyusingthelast abdominal segment (B6A;DJG-BGDLC, F. & J., 1940; RDJ<=AN, 2001; D:IIC:G, 2005). However,suchhabithasonlybeensuggestedinadultsofthegeneraNeohydrocoptus,Pronoterus, andMesonoterusduetothepresenceofthemodifiedpygidialapex(M>AA:G,2009). Inthisshort paper we will report probable such habit in adult of Neohydrocoptus bivittis (MDIH8=JAH@N, 1859) based onlaboratoryobservation. Hibernating adults of N. bivittis were collected at a water pond in Fukuoka Prefecture, westernJapanonJanuary2nd,2010. Nineadultswerekeptwithdetritusandrush(Juncussp.) andobservedinanacrylic case (5(cid:2)100(cid:2)150mm)(Fig.1). Thefollowingbehaviorwasobservedinadultrepeatedly:adultbitesandboresaholebythe mouthpartsontherootorstemofrush. Then,he/sheturnedaroundthe bodyandinserted the apex of extended pygidium (usually retracted between elytra and abdominal ventrite) into the hole(Fig.2). Adultwasrestingforawhile(ca.10minutes)duringthepygidiumwasinserting. Thebehaviorwasinitiallythoughtthatofoviposition. Butthegonocoxaehadneverbeeninserted and no egg was found in the root and stem, and the behavior was also observed in male. Therefore,weconcludedthatthebehaviormightbeforrespiration. Theadultalsousesairbubble attached to the surface of detritus and the root of the rush immersed in the water. Oxygen absorptionfromthe water surface was alsoobservedinadultas usualat the sametime. WethankDr.JunN6@6?>B6(KyushuUniv.)andDr.Shun-IchiU´:CD(NationalMuseum ofNatureandScience, Tokyo)fortheir valuablecomments. 86 YutaKJ9DandHiroakiKD?>B6 Figs.1(cid:2)4. Observation acrylic case andNeohydrocoptusbivittis.(cid:3)(cid:3)1,Acrylic case; 2,N. bivittisin breathing position; 3, abdominal tergum 8 (a) and gonocoxae (b); 4, SEM photograph of apical abdominaltergum,dorsalview(notethelongitudinaldepressionandthepiloseapex). References B6A;DJG-BGDLC, F., & J. B6A;DJG-BGDLC, 1940. Anoutlineof the habitsof the water beetle, Noterus capricornisH:G7HI(Coleopt.).Proc.r.ent.Soc.Lond.,(A),15:105(cid:2)112. D:IIC:G,K.,2005.NoteridaeT=DBHDC,1857.InKG>HI:CH:C,N.P.,&R.G.B:JI:A(eds.),Handbook ofZoology,4.Arthropoda:Insecta.Part38.Coleoptera,Beetles,Vol.1,MorphologyandSystematics,72(cid:2) 81.WalterdeGruyter,Berlin. M>AA:G,K.B.,2009.OnthesystematicsofNoteridae(Coleoptera:Adephaga:Hydradephaga):Phylogeny, descriptionofanewtribe,genusandspecies,andsurveyoffemalegenitalmorphology.Systematicsand Biodiversity,7:191(cid:2)214. RDJ<=A:N,R.E.,2001. Noteridae C. G.T=DBHDC,1857. InAGC:II,R.H.,&M.C.T=DB6H(eds.), AmericanBeetles,1:147(cid:2)152.CRCPress,BocaRaton.