Table Of ContentE/、・t,・a、T◆o(k、・0.24(2):299-302,No、embcrl5、1996
HybosorineScarabaeidBeetlesfromNorthwestThailand
Masaaki NIsHIKAwA
27-1-115.Higashi-kashiwagayal,Ebina,243-04Japan
Abstract FourspeciesofhybosorinescarabaeidbeetlesarerecordedfromNorth-
westThailand,withdescriptionofanewspeciesbelongingtothegenusPllaeoc/1・,oops.
ThenewspeciesissimilartoRlaotla,1usPAULI^N,butcanbedistinguishedfromthelatter
mainlybytheconfigurationofmalegenitalia.
Recently,Dr.KimioMAsUMoTokindlylentmefor taxonomicstudymanyspeci-
mensofhybosorinescarabaeidbeetles fromhiscollectionmadeinNorthwestThai-
land Ontheotherhand,Ialsomadeasmallcollectionofhybosorinessomeyearsago
inthevicinitiesofChiangMal,Northwest Thailand. The collections consist of four
species, whichapparently includeanewspeciesof thegenus Phaeoch,-oops. In the
presentpaper,Iamgoingtorecordthem,withdescriptionofthenewspecies.Theab-
breviationsusedhereinarealreadyexplainedinmyprevious paper(cf. NlsHIKAwA,
1989).
Beforegoingfurther, IwishtoexpressmydeepgratitudetoDr.Shun-lobiUENo
oftheNationalScienceMuseum(Nat.Hist ),Tokyo, forhiskindnessincriticallyread-
ingtheoriginalmanuscriptofthispaper. IamalsogratefultoDr.KimioMAsUMoTo,
InstituteofHumanLivingSciences, 0tsumaWomen'sUniversity, Tokyo, for giving
me the opportunity to examinemany hybosorines. My thanks are due to Messrs.
MANITYimyaemofChiangMal,Thailand,YoshikazuMIYAKEofTamaCity,Terutsune
ABE, Tokyo, Yuzuru NAKAMURA of Japan Teachers Union, Tokyo, and Koichi
KAwAsAK1ofHigashiChugakkoJuniorHighSchool,Zama, fortheirkindhelp.
PhaeochroopslakhomcusKUuTEN,1981
P/tace・t1/,-oopslak11onicusKuuTEN、l981,Zoo1.Verh.,Leiden.(183).pp35-36, figs 42 44; typelocality:
Lakhon.
Specimensexa,mned. 48exs.,Mt.Doi Inthanon,NWThailand,24-III-1988,K.
MAsUMoTo & Y. MANIT leg; 46exs.,same locality, l,700-1,750m in alt., 31-111-
1989,M.N1sHIKAwA leg. (carrion traps);11exs.,Mt.DoiPuiandMt. Doi Suthep,
ChiangMal,NWThailand,22-III-1988,30-VII~5-VIII-1988, 24-V-1989,and l7-
VI-1989,K.MAsUMoTo& Y.MANITleg;184exs.,Mt.DoiSuthep,1,100minalt.,
1~6-IV-1989 and 21-IX-1993, M. NlsHIKAwAleg. (carrion traps); 2exs.,Mt. Doi
Angkhang,1,750minalt.,AmphoeFang,ChiangMal,NWThailand,23-Vand19-
300 MasaakiNIsHIKAwA
VI_1989,K. MAsUMoTo&Y. MANITleg., 1ex., MaesaV1ilege,ChiangMal,NW
4_VII-1990,Y.MANITleg;1ex.,Mt.DoiMonUnggate,Samoen9,Chian9
Thajlan
Mal.NWThailand,11-VIII-1989,Y.MANITleg.
Phaeocllroops″lasumotoiM.NISHIKAWA,spnov.
(Figs.1-3)
Male atld fet,nato. Length 8.55-8.92mm in male, 8.01-9.10mm in female;
width4.75-5.00mminmale,4.50-5.15mminfemale.
Bodysmall insize,elongate-pyriform,blackishbrownexcept formouth-Parts,
labrum,head,antennae,epipleuraandappendagesreddishbrown;pronotumalso「ed-
djshbrown,thoughthemiddlepartisblackishbrown;surfaceclothedwithSube「eCt
yellowishsetae,ventralsurfacealmostreddishbrown.
Head subtrapezoidal, slightly depresse(i, distinctly longer than width; lab「urn
transverse,trapezoidal,foveate,thefoveawithathick,erectseta,whichisshorte「than
thoseonhead,pronotumandelytra; frontmarginweaklyroundedandbordered;genae
wjthatu量ofsetae;eyesslightlyprominent;surfacesetiferous,densely foveate, the
foveaebeingsmallerandsparserthanthoseonlabrum.
pronotumtrapezoidal,gentlyconvex,distinctlydepressedalonglateralmarginsin
basalhalves,widestatbase,PW/HW186-1.97(MI92)inmale,1.88-2.09(M2.00)
jn female, pw/pL140-1.52(M I46) inmale,1.40-1.49(M I46) in female; front
marginbroadlyemarginateandbordered,thebordercontinuingtohindangles; front
anglesstronglyprojected forwards;lateralmarginsconvergingapica gentlyarcuate,
weaklycrenulate,withalowoferectsetae,whicharelongerandthickerthanthoseon
surface,andbecomeshorterposteriad;hindanglessubrectangular,crenulateasonlat-
eralmargins;basalmarginbisinuate;surfacedenselypunctate, thepuncturessmaller
thanthoseonhead.Scutellumtongue-shaped,sparselypunctate,thepuncturessetifer-
ous.
Elytraconvex,widestbehindthemiddle,EW/PW137-1.45(M I39) inmale,
1.38_1.45(MI41)infemale,EL/PL2.43-2.59(M2.50)inmale,2.37-2.56(M2.47)
in female,EL/EW l 20-1.27(M I 23)inmale,1.18-1.22(M I 20)in female; lateral
marginsarcuateandcarinate,entirelysetiferous, thesetae inbasal 2/3 longerand
thicker thanthosealongthelateralmarginsofpronotum,becomingshorterapicad;
apiceswithsuturalanglesminutelypointed;discslightlydepressedinmid-basalpor-
tion,suddenlydescendingtowardsapexataboutapical1/7,withapairofthreealmost
bifariouscostae,thefirstcostadisappearingatapical1/7,withalowofpunctures, the
puncturesequal inshapetothoseonintervals;thesecondoneshorterthanthefirst;the
thirdoneindistinct,theshortest;intervalsweaklydepressed,ratherregularlypunctate,
thepuncturessmall,horseshoe-shaped,umbilicateonapicalportion,almostsetiferous;
the interspace among the punctures polished; epipleura entire, slightly concave,
clothedwithshortsetae.
Ventralsurfacealmostentirelyclothedwithadpressedsetaeaslongasthoseon
HybosorinesfromNorthwestThailand 301
j
l
Figs. 1-3. Phaeoch''oops 'nas″tnotot M. NIsHIKAwA,sp nov、. fromMt. Doi Suthep inChiangMal,
North、vestThailand. - 1,Malegenitaliaindorsalview,2,sameinlateralview,3、rightparamcre
inobliquelateralview.(Scale:1.0mm.)
elytra. Mesosternumstrongly punctate, thepuncturessparse, the interspaceamong
them polished. Metasternum longitudinally sulcate. Abdominal sternites with
obliquelyrugosepunctuations.
Legswithprofemurbearingseveralwavy linesnear innermarginofunderside,
thoughtheouterpartissparselyfoveate,thefovealongitudinalandsetiferous;protibia
serrateandtridentateatoutermargin;meso-andmatatibiaewithatransverseridgebe-
hind themiddle of outer side; meso- andmetatarsi slightly longer thanmeso- and
metatibiaeinmale,thoughtheyaredistinctlyshorterinfemale.
Malegenitaliawithparameressimpleinshape,therightonebroadlyprojectedon
dorsalsideofapicaledge,slightlytwisted intheprojection,whichishookedat the
apex,theleftonebilobate.
,pcseries. Holotype: dMt.DoiSuthep,ca.1,100minalt.,ChiangMal,NW
Thailan 6-IV-1989,M.NIsHIKAwAleg.Paratypes:6 d, 4 ,samedataas for the
holotype; 1d, Mt. DoiPui,ChiangMal, 22-m-1988,K. MAsuMoTo leg; 1d ie,
samelocalityandcollectorasfortheholotype,1-IV-1989and21-IX-1993.
Theholotypewillbedepositedin thecollectionoftheDepartmentofZoology,
NationalScienceMuseum(Nat.Hist),Tokyo.Theparatypesarepreservedinmycol-
lection,except foroneparatypespecimenfromMt.DoiPuiwhichwasreturnedtoDr.
MASUMOT0.
Notes. The present new species is similar in general appearance to
P;1aeoch'o'opslaotianusPAULIAN(1945,pp36-37, fig 22;KUuTEN,1981,pp 40-42,
figs51-55)originallydescribedfromNamTienofLaos,butcanbeclearlyseparable
fromthelatterbytheelytra1costaebifariousatleastinthefirstcostae,theprojection
oftherightparamereinthemalegenitaliabroader,withtheapexhooked,andtheleft
parameredifferentinshape.
302 MasaakiNlsHIKAwA
PhaeochrousdissimnisdissimilisARROW,1909
P/1aeoci1・'ousdisst,niff'sARROW, l909,Transent.Soc.London,4,p 496;typelocality:Tenasserim,Moul-
mein.
Otherreferencesareomitted.
Specimens examined. 3(3,3, 5 Phrao Village,Chiang Mal, NW Thailand,
,
14~15-V-1988, Y. MANIT leg; 6,3,3,24 between Fang and Chiang Dao, NW
,
Thailand,22~23-V-l989,K.MAsuMoToleg.
Notes. ThepresentspecieswasalreadyrecordedbyHIRANo(l985) fromAm-
phoeSalYok,Kanchanaburi inSouthwestThailand.ItisalsodistributedinNorthwest
Thailand.
PhaeochrousemargmatusemargmatusCAsTELNAu, l840
Phaeochrousemarg1'laiusCAsTELNAU、l840,Histnat.1ns.,Coleopt.,Paris、2,p ie9,typelocality:Java.
Other referencesareomitted.
SpecimenseMmined. 3exs.,ChiangDao, ChiangMal, NWThailand; 24exs.,
MesaViii; 124exs.,betweenFangandChiangDao; 6exs.,PaoDistrict; 41exs.,
Phrao ViIi;2exs.,Doi Angkhang, 1,750m in alt; 7exs., Mon-Angget,nr. Chiang
Mal; lex.,Mt.DoiSuthep; lex.,BanPang0Mal,Mt.DoiMaeThe;1ex.,Mt.Doi
MaeSa1ong;2exs.,MaeSuai,ChiangRai.(Datesandcollectorsareomitted)
要 約
西川正明:タイ同北西部Pfiのアツバコガネ類. - タイ同北西部1「1のアツバコガネ類4種を
報 した. このうちのl種は, ラオスから記救されたPhaeoc/t,・oopslaotla,tusPAuLIANに似ている
が,検,、ilの結果,新種と認められたので, P',aeoc/,・,oops,nasu,note,spnov.と命名・記般した.
References
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