ISSN 0387—5733 No. 1 Vol. 38 May 31 2010 日本鞘翅学会 THE JAPANESE SOCIETY OF COLEOPTEROLOGY TOKYO E L Y T R A (cid:2)(cid:3)(cid:4)(cid:5)(cid:6) (Editor): (cid:7)(cid:8)(cid:9)(cid:10)(Shun-IchiU´:CD) (cid:2)(cid:3)(cid:11)(cid:12) (Associate Editor): (cid:13)(cid:14)(cid:15)(cid:16)(Masahiro«O=6G6) (cid:2)(cid:3)(cid:4)(cid:5) (EditorialBoard): (cid:17)(cid:18)(cid:19)(cid:20)(KunioAG6N6)(cid:21) (cid:22)(cid:23)(cid:24)(cid:25)(HiroakiKD?>B6)(cid:21) (cid:26) (cid:27)(cid:28)(Masahiro KDC)(cid:21) (cid:29)(cid:30) (cid:31)(Katsura MDG>BDID)(cid:21) !(cid:27)(cid:28)(Masahiro S6@6>)(cid:21) "#$%(Masatoshi T6@6@JL6)(cid:21) &’(cid:28)((HiroyukiYDH=>IDB>) (cid:2) (cid:3) (cid:4) (cid:5) (cid:6) (cid:7) The Japanese Society of Coleopterology )169(cid:2)0073*+,-./0123(cid:2)23(cid:2)1 3456(cid:28)7898:7;<= c/oDepartmentofZoology,NationalMuseumofNatureandScience (Nat.Hist.),3(cid:2)23(cid:2)1Hyakunin-chˆoShinjuku,Tokyo,169(cid:2)0073Japan > (cid:6) (President): -?@A(Tatsuya N>>H6ID) B>(cid:6) (Vice-President): (cid:8)CDE(Shˆuhei NDBJG6) Copyright2010bytheJapaneseSocietyofColeopterology PrintedbyKokusaiBunkenInsatsushaCo.,Ltd., 4(cid:2)4(cid:2)19Takadanobaba,Shinjuku,Tokyo,169(cid:2)0075Japan FG: HIJKLMNOPQRHSL Cover: ImasakaiakidoiAG6>etMDG>I6 [del.KojiAG6>] TheELYTRAwelcomesoriginalarticlesdealingwithvariousaspectsofcoleopterology.Itispublishedbiannuallyby theJapaneseSocietyofColeopterology.WearewillingtoexchangewithanypublicationrelatingtothestudyofColeoptera. All inquiries concerning the ELYTRA should be addressed to: Secretary, c/o Department of Zoology, National MuseumofNatureandScience,Tokyo,3(cid:2)23(cid:2)1Hyakunin-chˆoShinjuku,Tokyo,169(cid:2)0073Japan. Elytra,Tokyo,38(1):1(cid:2)2,May31,2010 A Biological Note on Bagous spiculatus O’BG>:C et MDG>BDID (Coleoptera, Curculionidae) Hiraku YOSHITAKE NaturalResourcesInventoryCenter,NationalInstituteforAgro-EnvironmentalSciences, 3(cid:2)1(cid:2)3Kannondai,Tsukuba,Ibaraki,305(cid:2)8604Japan BagousspiculatusO’BG>:CetMDG>BDIDbelongingtothesubfamilyBagoinaeisknownto occurinHonshuandShikoku,Japan(O’BG>:C&MDG>BDID,1994). Althoughthisspeciesmay feedonacertainaquaticorsemi-aquaticplantsasdoothercongeners,noinformationonitslife Figs. 1(cid:2)6. Bagous spiculatus.(cid:3)(cid:3)1, A habitat in Kasumigaura, Ibaraki, Japan; 2, the host plant, Hydrocharis dubia; 3, a pair of adults copulating on a leaf of H. dubia; 4, a leaf of H. dubia heavily infested by larvae; 5, a larva (arrow) mining a leaf of H. dubia; 6, a pupa in a leaf bladderofH.dubia. 2 HirakuYDH=>I6@: historyhasbeen reported untilnow. ThroughmyobservationsfromearlytolateJune2009inKasumigaura,IbarakiPrefecture, Japan, I confirmed that B. spiculatus is associated with Hydrocharis dubia (BAJB:) B68@:G (Hydrocharitaceae). The host plant is a floating macrophyte that is distributed in Japan from Honshu to the Ryukyus, Korea, China, Southeast Asia, and Australia. It occurs mainly in shallowfreshwater bodiessuchas swampsandponds. InUshiwata,Kasumigaura,H.dubiagrewgregariouslyinanarrowirrigationcanalalonga lotus paddy field (Figs. 1, 2) and a number of B. spiculatus adults were observed feeding and copulating on its leaves (Fig. 3). The adults lived mainly on the leaves of H. dubia above the water surface, but they actively crawl about on the underwater portions of the plant. Female adults laid their eggs into young leaves. Hatched larvae grew inandfed onthe leaves andleaf petioles (Fig. 4), making many holes and conspicuous mines on the leaves (Fig. 5). They are oftenobservedmovingontheoutsideofthehostplantfromonetoanotherbothaboveandbelow thewatersurfacewhentheplantwas heavilyinfested. Thefullymaturedlarvae pupatedinthe leaf petioles orbladders(Fig.6). The collection data for specimens examined herein are: 60 exs. (Specimen Nos.: 24(cid:2) 0465000(cid:2)24(cid:2)0465059), Ushiwata, 36(cid:3)03(cid:4)42.4(cid:5)N, 140(cid:3)19(cid:4)22.8(cid:5)E, 8m, Kasumigaura, Ibaraki, Honshu, Japan, 7(cid:2)VI(cid:2)2009, H. YDH=>I6@: leg., on H. dubia; 32 exs. (Specimen Nos.: 24(cid:2) 0465060(cid:2)24(cid:2)0465091), same locality, 20(cid:2)VI(cid:2)2009, H. YDH=>I6@: & S.R. D6K>H leg., on H. dubia. AllspecimenswereidentifiedbytheauthorandmostlypreservedintheNationalInstitutefor Agro-EnvironmentalSciences(NIAES)andpartiallyinhisprivatecollection. Thehostplantwas identifiedbyN.N6@6=6G6(Tsukuba)andthevoucherspecimenwasdepositedattheNIAES. PlantnomenclaturefollowedYDC:@JG6&K6?>I6(2003). IthankS.R.D6K>H(KansasUniversity)forhisreviewofthedraftandN.N6@6=6G6for heridentification ofthe plant. References O’BG>:C,C.W.,&K.MDG>BDID,1994.SystematicsandevolutionofweevilsofthegenusBagousG:GB6G (Coleoptera:Curculionidae)II.TaxonomictreatmentofthespeciesofJapan.Esakia,Fukuoka,(34):1(cid:2) 74. YDC:@JG6, K., & T. K6?>I6, 2003. BG Plants. Available from:http//bean.bio.chiba-u.jp/bgplants/ylist(cid:3) main.html(15January2010). Elytra,Tokyo,38(1):3(cid:2)8,May31,2010 A New Euryarthrum (Coleoptera, Cerambycidae) from Sabah, East Malaysia Hiraku YOSHITAKE NaturalResourcesInventoryCenter,NationalInstituteforAgro-EnvironmentalSciences, 3(cid:2)1(cid:2)3Kannondai,Tsukuba,Ibaraki,305(cid:2)8604Japan and Tatsuya NIISATO BioindicatorCo.,Ltd.,Yarai-chˆo126,Shinjuku,Tokyo,162(cid:2)0805Japan Abstract Euryarthrumassimilesp.nov.isdescribedfromSabah,EastMalay- sia,withhabitusphotographandillustrationsofthemaleterminalia. Thisnewspecies issimilartoE.apicefasciatumH¨J9:ED=Aingeneralappearance,butdi#ersfromthe latter mainly by the entirely black antenna reaching elytral apices, more strongly convexpronotum,weaklyconvexmetasternalprocess,longerhindfemur,andshorter andmoreweaklyincurvedmidtibiainthemale. Introduction AtotalninespeciesofthegenusEuryarthrumBA6C8=6G9,1845havesofarbeen recordedfromSabah,EastMalaysia(YDH=>I6@:&N>>H6ID,2009). Judgingfromthe remarkablyrichentomofaunaofthisregion, however, it is still expected that not a few Euryarthrum species will be discovered from Sabah. Recently, we had an opportunity toexamineaspecimenofanundeterminedEuryarthrumspeciesthatwascollectedfrom Mt. Trus Madi, Sabah. Though the species in question was similar in general appear- ance to E. apicefasciatum H¨J9:ED=A, 1988 described from the Malay Peninsula, we concludedthatitis new to science on the basis of detailed morphological observations. In this paper, we describe the new species and illustrate its important taxonomic features. Material and Methods This study was based on specimens preserved in the National Institute for Agro- EnvironmentalSciences,Tsukuba(NIAES). Theholotypeofthenewspeciesdescribed herein is deposited at NIAES. 4 HirakuYDH=>I6@:andTatsuyaN>>H6ID External structures were observed under a Nikon SMZ1500 steroscopic micro- scope. HabitusphotographwastakenwithaNikonD80digitalcamera. Measurements ofvariousbodypartsarecodedas follows: LB(cid:2)length of body, from apical margin of clypeustoapicesofclosedelytra;WH(cid:2)maximumwidthofheadacrossoutermarginof an eye to that of the other; LG(cid:2)length of gena, from upper to lower margins; LL(cid:2) length of lower eye lobe, from upper to lower margins; WP(cid:2)maximum width of pronotum;LP(cid:2)lengthofpronotum,frombaseto apex along midline; WE(cid:2)maximum widthofelytra;LE(cid:2)lengthofelytra, from basal margins to apices. All measurements are in mm. Toexaminemaleterminalia,specimensweremaceratedinhotwater and dissected under the stereoscopic microscope. The abdominal segment VIII was first removed from body, and then cleaned in hot 10% KOH solution for 5 to 10minutes. Male terminalia extracted from abdominal segment VIII were mounted on slides with glycerol, and studied with a Leitz Orthoplan optical microscope, and drawn in detail throughanattachedcameralucida. Scalebarswerecalibratedusing a Nikon objective micrometer. Verbatim label data indicated by quotation marks are provided for the holotype. Label breaks are indicated by a slash (“/”). Taxonomy Euryarthrum assimile sp. nov. (Figs. 1(cid:2)8) Description. Male. Dimensions: LB: 14.70. WH: 2.60. LG: 1.30. LL: 1.05. WP: 3.70. LP: 3.50. WE: 4.60. LE: 9.30. N(cid:2)1 for all measurements. Habitus as in Fig. 1. Integumentblack. Bodysurfaceopaque;moreorlessshinyonlegsandheadexcept for vertex and occiput. Body medium-sized and stout. Headcoveredwithshinylight-coloredhairs;occiputnearlyglabrous,bearingthree verylonghairsalongposteriormarginofeacheye;vertexmoderatelycoveredwithlong incurved hairs; frons with short sparse hairs; clypeus glabrous; genae moderately with short hairs; tempora densely with long incurved hairs; neck sparsely with short hairs; gula rather densely covered with long incurved hairs. Antennal segments I(cid:2)V sparsely covered with light-colored minute hairs; segments VI(cid:2)XI densely with darker minute hairs except for basal part of VI which is sparsely covered with light-colored minute hairs. Prothoraxalmostglabrous,providedwithapaleyellowtransversebandofdense stout hairs along basal margin; apical margin fringed with a row of short golden hairs; sides with a few fine long shiny hairs on basal half; prosternum rather densely with curved fine hairs, bearing a few fine long shiny hairs on apical third at each side. Scutellumglabrous. Elytraalmostglabrous,minutelypubescentalongexternalmargins, divided into three uneven parts by two transverse bands of silky white stout hairs; antemedian band thick, broadly interrupted by submedian ridges; subapical band thinner. Legs moderately covered with minute light-colored hairs; mid coxae rather ANewEuryarthrum(Coleoptera,Cerambycidae)fromSabah,EastMalaysia 5 Figs.1. Euryarthrumassimilesp. nov.,holotypemale. densely with white hairs; hind coxae partially with darker hairs; mid femur almost glabrousonbasalhalfofdorsalside;hindfemuralmostglabrousonbasalhalfofdorsal side,fringedwithsuberectandsubrecumbentsetaeonbasalhalfalonganteriormargin; fore tibiae internally with light brown setae on dorsal side, the setae are suberect, becominglongeranddenserapically;midandhindtibiaefringedwithsilversetaealong internal margins; hind tibiae sparsely mingled with longer subrecumbent setae. Mesosternummoderatelycoveredwithlight-coloredhairs;mesepisternumsparselywith stout white hairs on basal half, and densely with stout white hairs on apical half; mesepimeron almost glabrous, scattered with dark minute hairs. Metasternum moder- ately covered with fine dark and white hairs, rather densely with stout suberect light brown hairs on disc, bearing a pair of white transverse bands of long stout hairs along apical margin; metepisternum sparsely with minute dark hairs, scattered with longer light-colored hairs, densely covered with stout white hairs on apical part. Sternite I coveredwithhairsasthoseonmetasternum,withatransversebandofstoutwhitehairs alongapicalmargin;sterniteIImoresparselywithminutehairs,withatransverseband ofstoutwhitehairsalongapicalmargin;sternitesIIIandIVsparselywithminutehairs, with a transverse band of stout white hairs along apical margins; sternite V rather densely with stout white hairs, except for basal half which is sparsely pubescent, scatteredwithlonggoldenhairsalongapicalmargin;apicalmarginofsterniteVfringed with golden hairs, mingled with white hairs. Head narrower than pronotum, WH/WP 0.70, with a distinct median sulcus extending from occiput to base of frons; occiput indefinitely punctured, narrowly 6 HirakuYDH=>I6@:andTatsuyaN>>H6ID prominent along median sulcus; vertex finely rugosely punctured, simple, not carinate laterally; frons shallowly irregularly punctured; genae deeper than lower eye lobes, LG/LL 1.24; eyes large, rather strongly prominent. Antennae moderately slender, extendingtoelytralapices;scapemoderateinlength,nearlythreetimesaslongaswide, rugosely punctured; segments III(cid:2)V weakly rugosely punctured; segment III slender, slightlyshorterthanscape;segmentIVshort,nearlyhalfaslongasIII;segmentVnearly as long as IV, simple, not projected externally near apex; segment VI gently externally widened from base to basal third, and then more strongly widened to apex, densely minutely punctured on apical half. Prothorax nearly as long as wide, WP/LP 1.06, reticulatelypunctured;puncturesrelativelylarge,more or less merged with each other; pronotum strongly convex, faintly rugged on interstices between punctures; sides gradually dilated from constricted base, widest at slightly produced middle, rather stronglyconvergentapically,andthenconstrictedatapex;basalmargin slightly bisinu- ate; prosternal process with a relatively large subconical tubercle at middle of apical part. Scutellumsubtriangular,smooth,notpunctured. Elytrarelativelyshort,LE/WE 2.02,moderatelywiderthanornearly2.7timesaslongaspronotum,WE/WP1.24,LE/ LP 2.66, finely reticulately punctured; each puncture moderate in depth, opaque in bottom; disc faintly rugged on interstices between punctures, moderately flattened except evenly convex postscutellar prominence, with submedian ridges which are graduallynarrowedfrombasetomiddleandthenmoreweaklyconvergenttosubapical band; suture bluntly projected at apex; apical projections moderate in length, curved dorsally in profile; sides widest behind humeri, gradually narrowed in basal half, more weaklynarrowedtoapicalfourth,thengentlyconvergentapicad;eachepipleuronthick and armed with two obtuse triangular projections at apex. Mesosternal process evenly weakly convex, not depressed along midline; apical margin moderately emarginate in middle. Metasternum finely densely punctured; disc more densely punctured. Sterna finely punctured; sternites I(cid:2)IV with a glabrous part along apical margin, respectively; sternite I densely punctured, weakly shiny, nearly as long as II and III combined; sterniteIImoderatelypunctured,shiny,nearlyhalfaslongasI,aslongasIII;sternites IIIandIVmore sparsely punctured, shiny, subequal in length to each other; sternite V sparselypuncturedonbasalhalf,denselypuncturedonapicalhalf,shiny,nearlyaslong asIIIandIVtakentogether. Legsslender;hindfemurlong,1.43timesaslongas hind tibia;foretibiaweaklydilatedexterno-apically,weaklyincurved;midtibiashort,evenly stronglyincurved,simple,notprolongedapically;externalmarginofforeandmidtibiae shallowly emarginate near apex. TergiteVIII(Fig.2)elongate,nearlytwiceaslongaswide,stronglyraisedapically, scattered with short setae on basal 2/3, moderately setiferous on apical third, mingled with several long stout setae; sides weakly narrowed on basal 2/3, more strongly narrowed to apical fifth, thence slightly dilated apically, sparsely fringed with setae; apical margin truncate, moderately fringed with setae. Tergite IX (Fig. 3) widely deeply emarginate at apex; apical margin asetose. Sternite VIII (Fig. 4) longitudinal, nearlytwiceaslongaswide,roundedlaterally,scatteredwithshortsetaeon basal half, ANewEuryarthrum(Coleoptera,Cerambycidae)fromSabah,EastMalaysia 7 Figs.2(cid:2)8. Male terminalia of Euryarthrum assimile sp. nov., (cid:2)2, Tergite VIII in dorsal view; 3, tergiteIXindorsalview;4,sterniteVIIIinventralview;5,sterniteIXinventralview;6,median lobeindorsalview;7,ditto,inlateralview;8,tegmenindorsalview.Scalebars(cid:3)1.00mm. moderately setiferous on apical half, entirely well-pigmented; basal apodemes short, acutely projected; ventral contour of body and apodemes continuous; apical margin broadly deeply concave, densely setiferous. Sternite IX (Fig. 5) Y-shaped, slender, slightly longer than sternite VIII, simple, not appendiculate. Median lobe (Figs. 6, 7) slender, thick in profile; ventral contour near apex dorsally raised in profile; median strutsshort,nearlyhalfaslongasmedianlobe,moderatelycurvedinprofile;dorsalplate relatively wide, apically triangularly projected, strongly bisinuate in apical part in profile; ventral plate with sides weakly gradually narrowed in basal 2/3, then apically more strongly convergent, bearing a small round projection at apex; median foramen located at apical third of median lobe. Tegmen (Fig. 8) slightly shorter than median lobe;laterallobesdenselycoveredwithlongsetaenearapices,stout,subcontiguouswith each other, obliquely subtruncate at each apex, not attenuate, with external margins subparallel, not laminate; ring part much longer than lateral lobes. Female. Unknown. Type material. Holotype male (NIAES Type Specimen Code No. COL-266), “[EASTMALAYSIA]Sabah/Mt.TrusMadi,1200(cid:2)1500m,/17.iv.1997,native collec- tor”; “[HOLOTYPE] male/Euryarthrum assimile/YDH=>I6@: & N>>H6ID, 2010” 8 HirakuYDH=>I6@:andTatsuyaN>>H6ID (typed on red card); “NIAES COLLECTION” (typed on yellow card). Distribution. Malaysia (Borneo). Etymology. The species epithet refers to its similarity to E. apicefasciatum. Notes. Euryarthrumassimilesp.nov.issimilartoE.apicefasciatumH¨J9:ED=A in havingthesecondelytralbandlocatedonsubapicalpart. However,E.assimileisreadily distinguished from E. apicefasciatum mainly by the following points in the male: antennaeentirelyblack,longer,reachingelytralapices; antennal segment V simple, not ecto-apically projected; pronotum more strongly convex; metasternal process weakly convex; hind femur longer; mid tibia shorter, more weakly incurved. In addition, E. assimile clearly di#ers from E. apicefasciatum by the male genital structures. Acknowledgments We thank N. N6@6=6G6 (Tsukuba) for her assistance in preparing figures. Our thanks are also due to N. K6IHJG6 (Tokyo) for his help in obtainting the specimen used in this study. (cid:2) (cid:3) (cid:2)(cid:3) (cid:4)(cid:5)(cid:6)(cid:7)(cid:8)(cid:9)(cid:10)(cid:11)(cid:12)(cid:13)(cid:14)(cid:15)(cid:16)(cid:5)(cid:17)(cid:18)(cid:19)(cid:20)Euryarthrum(cid:21)(cid:22)(cid:23)(cid:24)(cid:25)(cid:26)(cid:24)(cid:27)(cid:28)(cid:29)(cid:30)(cid:31) (cid:15)!" #1(cid:6)$% (cid:2)(cid:2) (cid:11)(cid:12)(cid:13)(cid:14)(cid:15)(cid:16)(cid:5)(cid:17)(cid:18)(cid:19)#TrusMadi&’(Euryarthrumassimilesp.nov.)*+ ,-./012345678%9(cid:6)$:EuryarthrumapicefasciatumH¨J9:ED=A4;1<=>?@ A>BCDEFGH4(cid:8)I=JKLMNOP>QRSTUVI=JK? WNXPUY#UV>Z <JK? [\]>QR^<JK? W_]>QR‘Tab>Z<JKcd4Qe1fg4hijk Fl=% References BA6C8=6G9,E.,1845.HistoiredesInsectes,traitantdeleursmoeursetdeleursm´etamorphoseseng´en´eral, etcomprenantunenouvelleclassificationfond´eesurleursrapportsnaturels,2:1(cid:3)524.Paris,Didot. H¨J9:ED=A,K.-E.,1988.»Uber s¨udostasiatische Cerambycidae, III(Coleoptera,Cerambycidae,Cerambyci- nae).Entomofauna,9:405(cid:3)417. YDH=>I6@:,H.,&T.N>>H6ID,2009.TwonewEuryarthrumBA6C8=6G9(Coleoptera,Cerambycidae)from Kalimantan,Indonesia,withachecklistofthegenus.Spec.Bull.Jpn.Soc.Coleopterol.,Tokyo,(7):193(cid:3) 204.