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Elyt1-a,Tolkyo,28(2):365-368,November15,2000 NeworLittle-knownElateridae(Coleoptera) fromJapan,XLI HitooOHIRA 6-4Kitsuneyama,Maigi-cho,0kazaki-shi,444-3511Japan Abstract TwonewspeciesofelateridbeetlesaredescribedfromtheRyukyuIs- lands,Japanandillustrated.TheyarenamedPl・od1・asteriusokinawenslsandReltte1e'late'' l_/Ia,・al. Inthepresentstudy, Iamgoingtodescribetwonewspeciesofelateridbeetles fromtheRyukyuIslands,Japan.Theho1otypesofeachspeciestobedescribedinthis paperarepreservedin thecollectionof theNationalScienceMuseum(Nat. Hist), Tokyo Beforegoing further, Iwish toexpressmysinceregratitudeto Dr. Shun-Ichi UENooftheNationalScienceMuseum(Nat.Hist),Tokyo, forhiskindlyreadingthe manuscriptandgivingmemanyusefulsuggestions,andMr.MasaakiKIMuRAofNaha CityandMr.TakashiKURIHARAofTokyofortheirkindnessinofferingtomethespec- imensusedinthisstudy. ProdrasterMsokinawensissp nov. [Agrypninae] (Fig.1A-B) Female. Body length6mm,widthabout18mm.Bodymoderatelyelongate andgentlyconvexabove,withsidesnearlyparallel;surfaceshining,entirelychestnut brownexcept for hea labrum,medianlongitudinalareaofpronota1disc,scutellum andsomepartsofelytra,whichareblackasshowninFig.1A.Antennaeandlegsyel- lowishbrown.Vestiturepaleyellow,ratherlongandsemidecumbent. Headgentlyconvexbetweeneyesandweaklydepressedinsubvertica1portionbe- tweenantennae;surfacedeeply,denselyandrathercoarselypunctate;Clypea1ma「9in entire,transverseandweaklyroundedatmiddle.Antennarathershort,notattainin9to posterjorangleofpronotum;basalsegmentrobustandsubcylindrica1,2ndsmalland subclavate,3rdsubtriangularandalittlelongerthan2nd,4thabout1.7timesaston9as 3rd;4thto10thordinarilyserrate. pronotumsubquadrate,longerthanitsbasalwidth,withsidesslightlySinuatejust beforeposterjorangles,weaklyroundedatmiddle;discconvex,deeply,COa「Selyand evenlypunctate,butthepuncturesbecomecoarserlatera withoutmedianIon9itudi- na1channelersmoothlineinmiddle;posterioranglesrathershort,prOJeCtin9POSte- 366 HitooOHIRA A Fi9. 1. P''ed''aste''itlsokinawenslssp nov., female;A,holotype;B,dorsolateralaspectofheadand pronotum,andlateralaspectofleftantenna riad,eachwithadistinctcarinaabove.Scutellumsubovate,gentlyconvexatmiddle, punctulateandpubescent. Elytraalittlemorethantwiceaslongastheirconjoinedbasalwidth,wjthsjdes almostParallel inbasalhalves,thenceweaklyroundedandgradula11yconvergentto_ wardsapiceswhicharenormally rounded;striaewell define deeplyandregularly Punctate; intervalsweaklyelevate punctulateandirregularlyrugose. Legsratherro_ bust,apicalportionofeach4thtarsalsegmentmoreorlesslobedbeneath. Maleunknown. Holotype: Matsuda in Ginoza-son, Kunigami, 0kinawa-honto Is. of the , RyukyuIslands,4~8-VII-1995,M.SUGIMoToleg. Distribution. Okinawa-hontoIslandoftheRyukyuIslands. ThisnewSpeciesSi SomewhatsimilartoProd,asteriusagnatus(CANDEzE,1873) f「omJapan,butcanbedistniguishedfromthelatterbythelargerbodyandunjque blackmaculationsontheelytra. Reitterelaterkuriharat'sp nov. [Elaterinae] (Fig2A-B) Female. Bodylength7.5mm,widthabout2.5mm.Bodymoderatelyelongate, nea「lyPa「allot-sidedandgentlyconvexabove;surfaceshining,entjrelyblackjshbrown NeworLittle-knownElateridaefromJapan,XLI 367 A B Fig. 2. Reltte,・elate,-ku1・l/fatalsp nov.,female;A,holotype:B,1ateralaspectofIe量antenna except forpostangularportionsofpronotum,sutural intervalsofelytraandmostparts ofventralsurfacesofbody,whicharemoreorlessdarkchestnut-brown;antennaeand legscastaneousbrown;vestiturefine,ratherlongandfulvous. Headgently convex betweeneyes,weakly depressed insubvertica1portionbe- tweenantennae;surfacemoderatelydenselyandevenlypunctate;clypealmarginwell ridged,roundedandweaklyimpressedatmiddle.Antennarathershort,notattainingto posteriorangleofpronotum;basalsegmentrobustandsubovate;2ndsmallandsub- globose,3rdsubclavateandabout1.3timesaslongas2nd;4thabout1.3timesaslong as3rd;4thto10thmoderatelyserrate. Pronotumsubquadrate,almostaslongasitsbasalwidth,withsidesweaklysinu- atejustbeforeposterior angles,slightlyroundedatmiddle;discmoderatelyconvex, rathersparselyandevenlypunctate,surfacesmoothandshiningamongthepunctures, medianlongitudinalchannelbarelyseeninbasalarea;posterioranglesprojectedpos- teriad,eachwithdoublecarinaeabove, withouter carinashallowandraisedalonglat- eralmargin.Scutellumfiattene lingulateandobtuselypointedapicad. Elytraabout2.2times as longas its basalwidth,withsidesalmost parallel in basal two-thirds, thence weakly rounded and gradually convergent towards apices whichareordinarilypointed;striaewelldefine deeplyandcoarselypunctate; inter- vals rather flattene punctulate, irregularly and transversely rugose. Basal platesof eachoutermarginangulatenearbasalportion, thenclearlynarrowedoutwards. Legs 368 HitooOHIRA andclawssimple. Maleunknown. Holotype: ,Mt. 0moto-dakeonIshigakiIslandoftheRyukyuIslands,31-111- 1999,T.KuR田ARAleg.ThisspecimenwasfoundunderthebarkofaDislylum-tree. Distribution. Ishigaki-jimaIslandoftheRyukyuIslands. This new speciessomewhat resembles Reitterelater amamiensisOHIRA, 1968 fromAmami-0shimaIsland,Tokunoshima IslandandOkinawa-honto Islandof the RyukyuIslands,butcanbedistinguishedfromthelatterbythelargerandstouterbody andmoreelongatepronotum,moresparselyandevenlypunctateonthedisc. 要約大平仁夫:日本産コメツキムシ科の新種, xLI. - 本報告では2亜科に所属する2新種を記載した. P,・odrasteriusokinawensls (オキナワマダラチビコメツキ) は, 沖縄本島国頭の宜野座村松田で見いだされた体長6mmの雌個体である. 体は濃赤褐色で光沢を有する. また, 上翅に黒色の特有の斑紋を有するので, 近似種との識別は容易である. 雄はまだ得られていない. Reitterelaterkuriharai (イシガキチャイロコメツキ) は, 石垣島の於茂登岳山麓の畑の生け垣にされているイスノキの樹皮の隙間から見いだされた. 体長7.5mmの雌個体である. 体は暗赤褐色で光沢を有する. 一般外形は奄美大島から新種として記載されたRamamiensis (アマミチヤイロコメツキ) に類似しているが, 体はより大型でより細長く, 前胸背板の点刻はより細かくてよりまばらに印する. 雄はまだ得られていない. References FLEuTIAuX,E.,1928. LesElateridesdel'Indo-chinefran?aise(Catalogueraisonne). Encyc1ent.,pa,・is, (B),I,Coleoptera,3:103-177. OHIRA,H.,1968. TheElateridaeoftheRyukyuArchipelago,、f Kontyu,「okyo,36:134_143. - 1994. NotesonthegeneraandspeciesofConoderinae(Coleoptera:Elateridae) fromJapan. Spec.Bull.Essaent.Soc.,Niigata,(2):217-234.(InJapanese,withEnglishsummary)