Notes on the Genus Adoretus (Coleoptera,Scarabaeidae) from North Thailand

12 Pages·1991·13.9 MB·English

by  Kobayashi, H

Elyt,(cid:2)a,Tokyo,19(1):63-74, May15,1991
NotesontheGenusAdoretus(Coleoptera,Scarabaeidae)
from North Thailand
Hirokazu KOBAYASHI
3-16, Kamishakujii-minamicho, Nerima-ku,Tokyo, l77Japan
Abstract TennewspeciesofthegenusAdoretllsLAPoRTE(cid:1)1840,aredescribedfrom
North Thailand. SevenofthembelongtothesubgenusC/1aetadoretusOHAus,1914,
and the remainings to the subgenus Adol,etus. The new species names given are:
A. (C)breviu,1gulc(cid:2)ulatus, A. (C) /u,(cid:2)asaH,al, A. (((cid:1):.)ntgrofuscus, A. (C)moo, A. (C)
at/1a1onis, A. (C) subg11ttatus(cid:1) A. (((cid:1).) lnatsurt1otol, A. (A) pa((cid:2)hysomatu.l', A. (?1.)
fl(1vo,,1ac1l/atilt,and A. (4.)sotto/Ii.
In thispaper, theauthor will describe ten newspecies of thescarabaeid genus
Ado(cid:2)tetus from North Thailand. Up to the present, only asmall number ofspecies
ofthisgenushavebeendescribedorrecordedfromThailandbyARROW(l917), 0HAus
(1914), FREY (1970, 1971), and others. All theho1otypes designated in thisstudy
arepreservedin thecollectionoftheauthor.
Before going further, the author wishes to expresshissincereappreciation to
Messrs. H. HIRAsAwA, W. SUZUKI and T. SENoH for their kindness in entrusting
thosevaluablespecimensto theauthor forinvestigation.
Adoretus(Chaetadoretus)breviunguiculatusH. KOBAYASHI,sp
no v.
(Figs.1,15)
Form elongate-oval, moderately convex. Color reddish brown to brown on
dorsal surface, antennae, tarsi and tibiaelight brown(posterior tibiae dark reddish
brown), abdominal sternites blackish brown to dark reddish brown. Surface of
bodydullshining, denselycovered with grayish recumbent hairs and intermixed with
severalratherlongerectsetae.
Clypeus semicircular, 2.7 timesas broad as its length, anterior margin weakly
bordered, very densely andsomewhat rugoselypunctate, bearingsparseerectsetaein
apical half; fronto-clypea1suturedistinct, almost straight. Eyes rather small, their
interspacebeingtwo-seventhsasbroadas fronsinbothsexes. Labrum rather finely
granulate; intermandibular processwithamedian longitudinal carina from apex to
basal margin, anterior anglessubrectangular, anterior margin almost straight.
near
Antennae10-segmented,withclub1.4timesaslongasfootstalkinmale,alittleshorter
than that in female.
Pronotum 2.3 times as broad asitslength,coarselyanddensely punctate, lateral
marginscurvedbehind themiddle, anterior angles feeblyproducedandrectangular,
64 Hirokazu KOBAYASHI
posterior onesgentlyrounded. Scutellumtriangular, broader than itslength,rather
finelypunctate. Elytraeachwithasuturalandfourdisca1costae,1stand2ndcostae
but distinct, twooutercostae very fineand inconspicuous, intervalsrather
narrow
coarsely and densely punctate(puncturesof2ndinterval somewhat fused together
partially).
pygidiumgentlyconvexinmale,scarcelyinfemale,coarselyandrugoselypunc-
tateinapicalpart,finelygranulateinbasalpart,withhairsasonelytra. Abdominal
sterniteseachrathercoarselyandsparselypunctateatthemiddle,somewhatstrigose
at the base. Anterior tibiaarcuate, tridentate,1st and 2nd lateral teethsharp, 3rd
oneveryminuteinmale,rather largeandbluntinfemale;middleandposteriortibiae
eachwithtwoobliqueridgesonouterside;posteriortibiasomewhat dilatedat the
mjddle, longerterminalspurofposteriortibiajustshorterthanbasal twotarsalseg-
ments in both sexes. Longer clawof anterior andmiddlelegscleft. Longer claw
ofposterjor legaslongas5thtarsalsegment inmale,distinctlyshorter in female;
shorter clawofposterior leghalf thelengthof longeroneinmale, two-thirdsthat
lengthinfemale.
Length:9.0-10.0mm;breadth:4.5-5.0 mm.
Holotype: , Doi Suthep, N. Thailand, 25-V-1980, T. SENoH leg. Paratypes:
1,f,Thaton,nearFang,N.Thailand,8-VI-1979,W.SuzluKIleg;1 Fang-Chiang
,
Dao, N. Thailand,22~23-V-1989, K. MAsuMoToleg.
Adoretus(Chaetadoretus)hirasawaiH.KOBAYASHI,SP nov
(Figs 2,11)
Thjsspeciesisverycloselyalliedtotheprecedingbutmaybeseparatedfrom
Itbythefollowingpoints:colorreddishbrowntobrownondorsalsurface,antennae,
tarsj and tibiaereddish brown or light reddish brown (middleand posterio(cid:1) tibiae
dark reddish brown), abdominalsternites blackish brown to dark reddish brown.
Eyes rether largeand prominent, their interspacebeing three-ei9hthsasbroad as
frons jn both sexes. Anterioranglesof intermandibular process rounded and not
angulate. Anterior tibiaetridentate,3rdlateral toothdistinctandnotsominutein
male posterjor tibiaemoredilatedat themiddle, terminal spursevidently shorter
thanbasal two tarsalsegmentsinbothsexes. Longer claw ofposterior leg three-
fourthsaslongas5thtarsalsegment,shorteronefour-fifthsaslongasthelonger.
Length:9.5-11.0mm;breadth:5.0-6.0mm.
Holotype: Konthanthan, near Chiangmai, N.Thailand,1-VI-l986, H.HIRA-
,
sAwA leg. Paratypes; 4 1 , same dataas for theholotype; 6 Doi Pui,
, ,
near Chiangmai, N. Thailand,3-VI-1986, H. HIRAsAwAleg;3 Doi Pui, near
,
Chiangmai,N.Thailand,29-VI-l989,H.HIRAsAwAleg;1 DoiPui, nearChiang-
,
mai, N. Thailand, 29-IV-1980, K. IKEDAleg; 2 2 ,nearChiangmai(1,000m
,
alt), N. Thailand,21-V-1987, H. HIRAsAwA leg ; 3 , near Chiangmai (1,200m
alt), N. Thailand, 19-V-1987, H. HIRAsAwA leg; 2 2 , near Chiangmai
,
Ado1(cid:2)etllsfrom NorthThailand 65
Fi9s. 1-3. MalegenitaliaofAdo(cid:2),ettls((11aetado(cid:2),ettls)spp.;left,dorsalview;right,lateralview
s - 1, . 1'ev(cid:1)nMcM/afg s nov ; 2, . 1/11'asalva1sp nov; 3, .mg(cid:2),ofilscMssp nov
(1,300malt),N. Thailand,17-V-1987,H.HIRAsAwAleg
Adoretus(Chaetadoretus)nigrofuscusH.KOBAYASHI,sp
no v
(Figs 3,16)
Formelongate,parallel-sidedinmale,oblong-oval infemale,moderatelyconvex.
Color blackish brown, clypeus and head dark blackish brown, antennae reddjsh
brown, anterior femoralight reddishbrown. Surfaceofbodyrathershining,densely
coveredwithgrayishrecumbenthairs,whichareintermixedwithseveral ratherlong
erectsetaeonelytra.
Clypeussemicircular,2.0timesasbroadasitslength,anteriormarginstrongly
reflexed and bordered, very densely, somewhat rugosely punctate; fronto-clypea1
suturedistinct, widely arcuate. Eyes rather largeandprominent, their interspace
being2.1 timesasbroad as fronsinmale, 2.4timesin female. Labrum with small
tuberclesinapicalhalf, faintlygranulateinbasalhalf;intermandibularprocessrather
broad,expandedat apex, witha faintmedianlongitudinalelevationnear apex,an_
terior angles rounded, anterior margin feebly sinuate. Antennae 10-segmented,
withclubaslongasfootstalkinmale,evidentlyshorterthanthatinfemale.
Pronotum2.2timesasbroadasitslength, rathercoarselyanddenselypunctate;
anteriormarginbordered, lateralmarginsgentlycurvedbehindthemiddle,anterior
anglesproduced but not acute, posterioronesgentlyrounded. Scutellumtriangular,
broader thanitslength,finelyandratherdenselypunctate. Elytraeachwithasutural
and four disca1costae, 1st and 2ndcostaedistinct, outermost costaveryfineand
inconspicuous, intervalsrathercoarselyandsomewhat rugoselypunctate;epipleura
bearingratherdensesetae.
Pygidiummoderatelyconvex, finelyand rather densely punctateinapicalhalf,
transversely strigose in basal half, with rather longhairson the whole disk. Ab-
dominal sternites coarsely and rather sparsely punctate. Anterior tibia tridentate,
66 Hirokazu KOBAYASHI
lateralteethsharpinmale,somewhat largerandbluntinfemale;middleandposterior
tibiaeeachwith two oblique lateral ridges, ofwhich thebasal oneof posterior tibia
is almost vanished. Posterior tarsusstout, 5thsegment as long as the ist to 4th
segmentscombined. Longerclawofanterior andmiddlelegscleft; longerclawof
posterior legsomewhatshorter than5th tarsal segment,shorter oneslightly longer
thanhalfthelengthof longerclaw.
Length: 11.5-13.0mm;breadth:5.0-6.5mm.
Holotype: , BanPang 0 Mal, Doi Mea The, N. Thailand, 28-IV-1989, H.
HIRAsAwA leg. Paratypes: 1 , Doi Pui (1,620malt), N. Thailand, 29-IV-1989,
H. HIRAsAwAleg; 1 Doi Pui, N. Thailand,3-VI-1986, H. HIRAsAwAleg; 2
, ,
Ban LangLat (1,350malt),N. Thailand,30-IV-1989, H.HIRAsAwAleg;1 Doi
,
Suthep, N.Thailand,3-VI-1986, H.HIRAsAwAleg.
Adoretns(Chaetadoretus)mooH. KOBAYASHI,sp
nov
(Figs4,12)
Formelongate,parallel-sided,moderatelyconvex. Color dark reddish brown,
clypeus,headandpronotumblackishbrown,antennae, tarsiandtibiaelightbrown
(middleandposterior tibiaedark reddish brown). Surfaceof body rather shining,
denselycoveredwithbrownishrecumbent hairs intermixedwithseveral rather long
erectsetae,withsomewhat aggregatedwhitishhairsonapical calli and their inner
sidesofelytra.
Clypeussemicircular, 2.3 timesasbroad asits length, anterior margin weakly
bordered, verydenselypunctate, witha transverserow of erect hairsat themiddle;
fronto-clypea1suturedistinct,slightlycurvedat themiddle. Eyes rather large and
prominent, their interspacebeing twiceas broadasfronsinmale. Labrum rather
finelygranulate, withasmoothareaat themiddleofbase;intermandibular process
rather broadandshort, feeblyexpandedatapex,withamedianlongitudinalcarina
nearapex,anteriormarginalmoststraight. Antennae10-segmented,withclubofthe
samelengthas footstalkinmale.
Pronotum2.2timesasbroadasitslength,coarselyanddenselypunctate;anterior
marginbroadlybordered,lateralmarginscurvedbehindthemiddleandfinelycrenate,
anterior angles rectangular, posterior ones gently rounded. Scutellum triangular,
broader than itslength, rather finelypunctate. Elytraeachwith asutural and four
disca1costae, 1st and 2nd costae narrow but distinct, outermost costa veryfine and
inconspicuous,intervalsrathercoarsely,denselyandsomewhatconfluentlypunctate;
epipleurabearingsparse, rather longsetae on basal two-thirds, densely fringed with
brownishbristlesinapical third.
Pygidium very convex, inconspicuously punctate, with tawnylong hairson the
whole disk, bearingshort and densesetaealong basal margin. Abdomen with a
continuouscarinafittingtooutermarginsofelytra,eachabdominalsterniteshallowly
punctate,somewhatstrigose. Anterior tibiaslender, with threesharp lateral teeth;
do(cid:2)letus fromNorth Thailand 67
middleandposterior tibiaeeachwithtwoobliquelateral ridges, ofwhichthebasal
one of posterior tibia is indistinct. Longer clawof anterior andmiddlelegs cleft;
1on9erclawofposteriorleglongerthan5thtarsalsegment,shorteronehalfthelength
of longerclawinmale.
Length:11.0mm; breadth: 5.0mm.
Holotype: , near MooVillage(1,400-1,500malt), N. Thailand,17~20_vI_
I979,W.SUZUKIleg.
Adoretus(Chaetado'etus)aqm7onl'sH.KOBAYASHI,sp
nov
(Figs. 5,13)
Formelongate, parallel-sided, feeblyconvex. Color reddish brown toyellowish
brown,clypeusdarkreddishbrownorreddishbrown,headblackishbrown,abdomen
blackish brown or reddish brown, antennae, femoraand tibiae light brown, tarsi
reddish browntodarkreddish brown. Surfaceofbodyshining,denselycoveredwith
9(cid:1)aySih(cid:1)ecumbenthairsintermixedwithseveralratherlongerectsetae,withsomewhat
aggregatedwhitishhairsonapicalcalliofelytra.
ClypeuSSemicircular,2.3timesasbroadasitslength,anterjormargjnreflexed
andWeaklybordered,verydenselyandsomewhatrugoselypunctate, feeblydepressed
behindanterior margin; fronto-clypeaIsuturedistinct, almost straight.
Eyes very
Ia(cid:1)9eandProminent, their interspacebeingtwiceasbroadas fronsin
male, three
timesas broad as that in female. Labrumfinelygranulate; intermandibular process
(cid:1)athe(cid:1)broadandshort, parallel-sided, with amedian longitudinal depression near
apex,ante(cid:1)ioranglesangularlycurved,anteriormarginfeeblysinuate, lateralmargjns
tube(cid:1)outate. Antennae 10-segmented, with club somewhat shorter than footstalk
inmale,ofthesamelengthasthe2ndto7thsegmentscombinedinfemale.
P(cid:1)onOtum2.4timesasbroadasitslength,coarselyandrathersparselypunctate;
ante(cid:1)iormar9inbordered, lateralmarginscurvedbehindmiddleandfinelycrenate,
ante(cid:1)Oi(cid:1)anglesfeeblyproduced,almost rectangular,posterioronesgentlyrounded
Scutellumt(cid:1)Ian9ular, broader thanitslength, faintlypunctate. Elytraeach with a
Sutu(cid:1)aland fourdiscalcostae,1stand2ndcostaedistinct,outermostcostaveryfine
andinconspicuous, intervalsrathercoarselyanddenselypunctate;epipleurabearjng
sparsesetae.
Pygidiummoderatelyconvex, finelyand transverselystrigose,withrather long
tawny hairson thewholedisk. Abdomenwithcontinuouscarinaefjttjng toouter
ma(cid:1)9insof elytra, eachabdominalsternitecoarselyand rather sparsely punctate.
Anteriortibiaslender,withthreesharplateralteeth;middleandposteriortibjaeeach
Withtwoobliquelateralridges,ofwhichthebasaloneofposteriortibiajsjndjstjnct
Longer clawofanterior andmiddlelegscleft; longer clawof posterior legshorter
than5th tarsalsegment,shorter one three-fifthsthelengthof longer claw in both
sexes.
Length:9.5-10.0mm; breadth:4.0-5.0mm.
68 Hirokazu KOBAYASHI
Figs. 4-7. Male genitaliaof Adoretus (Chaeladoretus) spp left,dorsal view; right, lateral
view. - 4, A moo sp nov ; 5, A aqui1on1'ssp nov 6, A.subguttatussp nov ;7, A.
nlatslM10t01Sp nov.
Holotype: , near Moo Village (1,400-1,500malt), N. Thailand,28~31-V-
I979,W.SUZUKI leg. Paratypes: 1 ,samelocalityasfor theholotype,17~20-V-
lg79, W. SUZUKI leg ; 1 ,same locality as for theholotype, 2~4-VI-l979, W.
SUZUKIleg.; 1 ,samelocalityasfortheholotype,17~20-VI-1979,W.SuZuKIle9.;
1(1,samelocalityasfortheholotype,21~23-V-1979,W.SUZUKI leg.; l Pupin -
,
MeoVillage, N. Thailand,26-VI-1983,T.SENoHleg;1 1 MeoVillage, near
, ,
chjangmai,N. Thailand,5-V-1980, K. IKEDAleg; l , Doi Pui, near Chiangmai,
N Thailand,29-IV-1980, K. IKEDAleg; 2 DoiPui,near Chiangmai,N. Thai-
,
land,3_vI_l986,H.HIRAsAwAleg;1 ,nearChiangmai (1,300malt),N.Thailand,
17_V_1987, H. HIRAsAwA leg; 4 ,DoiPui (1,620malt ), N. Thailand, 29-IV-
1989,H.HIRASAWAleg.
Adoretus(Chaetadoretus)subguttatusH.KOBAYASHI,Sp nov
(Figs. 6,14)
Thjsspeciesisverycloselyalliedtotheprecedingbutmaybeseparatedfrom
jtbythefollowingpoints:Colorreddishbrowntodarkbrown,clypeusandhead
dark reddish brown or blackish brown, abdomenblackishbrownor dark reddish
brown,antennae,femoraandtibiaedarkreddishbrown,tarsireddishbrown. Surface
ofbodydullshining,moredenselycoveredwithgrayishrecumbenthairsintermixed
wjthseveral rather longerectsetae,withafewsomewhat aggregatedwhitishhai(cid:1)S
apjca1ca1lj ofelytraandnear their apices. Clypeussemicircular, very densely
on
Eyesratherlargeandprominent,theirinterspacebeing2.7timesasbroad
punctate.
as frons in both sexes. Intermandibular processrather broadandshort,expanded
at apex, without medianlongitudinaldepression near apex, anterior corners acute,
anterior marginstraight. Pronotum coarsely and rather densely punctate, lateral
marginsalmostsmoothandnotfinelycrenate.
Length:9.5-10.0mm; breadth:4.0-5.0mm.
Adol,etusfromNorth Thailand 69
Holotype: (cid:1) ,near Moo Village(],400-1,500malt),N. Thailand,17~20-V-
I979,W.SUZUKI leg. Paratypes: 1 ,samelocalityas for theholotype,13~16-VI-
1989, W.SUZUKI leg;1 ,DoiSuthep, N.Thailand, 25-V-1980,T.SENoHleg;1
,
Doi Suthep, N. Thailand, 14-V-l980, T. SENoH leg; 1 , Pupin - Meo Village,
N.Thailand, 26-VI-1983, T.SENoHleg;1 ,BanLangLat (1,350malt),N. Thai-
land,30-IV-1989, H. HIRAsAwAleg.
Adoretus(Chaetadoretus)matsumotoiH. KOBAYASHI,sp nov.
(Figs 7,17)
Formelongate,parallel-sided,moderatelyconvex. Color reddishbrown,clypeus
andheadblackishbrown, pronotumdarkreddishbrown,antennaeyellowishbrown.
Surfaceofbodyrathershining,denselycoveredwithgrayishrecumbenthairswhich
areintermixedwithseveralratherlongerectsetaeonelytra.
Clypeussemicircular,2.3timesasbroadasits length, anteriormargin reflexed
andweakly bordered,coarsely anddensely punctate; fronto-clypea1suturedistinct,
almost straight. Eyesrather largeandprominent, their interspacebeing2.5times
as broad as frons in male. Labrum rather coarsely granulate; intermandibular
process rather broad, expanded at apex, with a median longitudinal elevation
near apex, anterior angles angularly curved, anterior margin feebly sinuate, lateral
margins tuberculate. Antennae10-segmented,withclubof thesamelengthasfoot-
stalk inmale.
Pronotum 2.3 times as broadas its length, densely punctate; anterior margin
bordered, lateralmarginsgentlycurvedatmiddleand finelycrenate,anterior angles
rectangular, posterior ones gently rounded. Scutellum triangular, broader than
its length, finely punctate. Elytraeach with a sutural and four discal costae, 1st
and2ndcostaedistinct, outermostcostavery fineandinconspicuous, intervalsrather
coarselyanddenselypunctate;epipleurabearingratherdensesetae.
Pygidium moderately convex, finely and rather densely punctate, with rather
long hairs on the whole disk. Abdomen with continuous carina fitting to outer
a
margins of elytra, each abdominal sternite coarsely and rather sparsely punctate.
Anterior tibiawiththreesharplateral teeth;middleandposterior tibiaeeachwith
twoobliquelateralridges,ofwhich thebasaloneofposteriortibiaisindistinct. Fifth
tarsalsegmentof posterior tarsusstout,aslongasthe ist to4thsegmentscombined.
Longer clawof anteriorandmiddlelegscleft; longerclawof posterior legaslongas
5thtarsalsegment,shorter onesomewhat longer thanhalf thelengthof longer claw.
Length:12.0mm;breadth:5.5mm.
Holotype: HotSpring,N.Thailand,25-III-1980, K. MATSUMOTOleg.
,
70 Hirokazu KOBAYASHI
Adoretus(Adoretus)pachysomatt'sH.KOBAYASHI,sp
nov
(Figs 8, l8)
Formelongate oval, rather convex. Color yellowishbrown, clypeusand head
dark reddish brown to blackish brown, ventral surface sometimes dark-colored.
Surfaceofbodyrathershining,uniformlycoveredwithlight-coloredrecumbenthairs
andwithoutintermixederectsetaeonelytra.
Clypeussemicircular,2.5timesasbroadas its length, anterior marginstrongly
re?exed,denselyandrugoselypunctate; fronto-clypealsuturedistinct, gentlyarcuate.
Eyes rather small, their interspace being2.9 times as broad as frons in bothsexes.
Labrum very coarsely punctate; intermandibular process moderate, expanded at
apex, with a median longitudinal carina from apex to near base, anterior angles
rounded, anterior marginsinuate. Antennae 10-segmented, with club of the
sam e
lengthasfootstalkinmale, alittleshorter than that in female.
Pronotum2.1timesasbroadasitslength,coarselyandrather denselypunctate,
with thebroadestpoint near base;anteriormarginbordered; lateralmarginsgently
convergent tofront,anterioranglesproduced,posterioronesgentlyrounded. Scutel-
lumtriangular, broader thanitslength, finelypunctate. Elytraeachwith a sutural
and four disca1costae, 1st and2ndcostaebroad anddistinct, outermost costavery
fineand inconspicuous; intervalswithrather coarse, denseandsomewhat con uent
punctures;epipleurabearingratherdensesetae.
Pygidiumfeeblyconvexinmale,scarcelysoinfemale, finelyandrathersparsely
punctate,with rather long hairs on the whole disk. Abdominal sternite finely and
sparselypunctate, analsternitewith a transverseelevation at themiddleinmale, at-
toned in female. Anterior tibiatridentate,apical and2nd teethrather large;middle
Figs. 8-10. Male genitalia of Ado1(cid:4)et1l(cid:2)., (Ado1(cid:4)etus) spp.; left, dorsal view(cid:2) right, lateral
view. - --8,A.pac(cid:4)hysomattlssp nov.;9,A. avomacu/atussp nov.;10,A.so,10/Iisp nov.
Figs. 11-20. - 11, Ado(cid:4)let11s /1l(cid:4)tasawa1sp. nov; 12, A. ,flee sp. nov; 13, A aqla/o,11s sp.
nov;14, .silOgilf l(cid:3)1'ssp nov ;15, ''evil/1/glllcl'/0(cid:3)ll1.'sp nov.;16, .(cid:1)g(cid:4),0fMscMssp.
.
nov.;17, A matsu/notoisp nov.;18,A. pa((cid:4)hyso,natussp nov.; l9, A fa(cid:2)o/11aculatllssp.
nov.;20,A.sone/11sp nov.

72 Hirokazu KOBAYASHI
andposterior tibiaeeachwith twoobliquelateral ridges,ofwhichthebasaloneof
posterior tibiaisshort but distinct. Longer clawof anterior andmiddle legs cleft;
longer claw of posterior legshorter than5th tarsalsegment, shorter onesomewhat
longer thanhalfthelengthoflongerclaw.
Length:10.0-12.0mm;breadth: 5.0-6.0mm.
Holotype: Doi Pui,near Chiangmai,N.Thailand,3-IV-1986,H.HIRAsAwA
,
leg. Paratypes:1 9 ,samedataasfortheholotype;1 ,1 ,nearChiangmai
,
(1,300malt),N. Thailand,H.HIRAsAwAleg;1 , Fang - Chiang Dao, N. Thai-
land, 22-V-1989, K.MAsuMoToleg;1 ,BanLangLat (1,350malt),N.Thailand,
30-IV-1989,H. HIRAsAwAleg.
Ad,oretus(Adoretus) flavomaculatusH.KOBAYASHI,sp
nov
(Figs 9,19)
Form elongate-oval, rather convex. Dorsal surface black, faintly yellowish,
withanoblongyellowmaculationnearapicalcallusof eachelytron;ventralsurface
yellowishbrown(sometimesdark-colored), femoraand tibiaelight yellowishbrown,
tarsi blackish brown, antennae reddish brown. Surface of body rather shining,
uniformlycoveredwith light-colored recumbent hairsand without intermixed erect
setaeonelytra.
Clypeussemicircular, 2.2timesasbroadasits length,anteriormarginstrongly
reflexed,coarsely and rather densely punctate; fronto-clypeal suturedistinct,gently
arcuate. Eyes rather small, their interspacebeing three timesasbroad as frons in
bothsexes. Labrumverycoarselypunctate,withasmoothareaatthemiddleofbase;
intermandibular process rather short, subpara11e1-sided, with amedian longitudinal
carina from apex to near base, anterior corners rounded, anterior margin feebly
sinuate. Antennae10-segmented,withclubsomewhatshorter than footstalkinboth
sexes.
Pronotum 2.2 times as broad as its length, sparsely punctate; anterior
marginbroadly bordered; lateralmarginscurvedbehindthemiddle, nely crenate,
anterior angles gently producedandsubrectangular, posterior onesgently rounded.
Scutellum triangular, broader than its length,sparsely punctate. Elytraeachwith
asuturalandfourdiscalcostae,1stto3rdcostaenarrowbutdistinct,outermostcosta
very fine and inconspicuous; intervalswith rather dense and somewhat con uent
punctures;epipleurabearingsparsesetae.
Pygidium feebly convex, finely and rather densely punctate, with rather long
hairs on the whole disk. Abdominal sternitesfinely and sparsely punctate. An_
teriortibiatridentate,apicaland2ndteethrather large;middleandposteriortibiae
eachwith twoobliquelateral ridges. Longerclawof anteriorandmiddlelegscleft;
longerclawofposteriorlegaslongas5thtarsalsegment,shorteronesomewhatlonger
thanhalfthelengthof longer claw.
Length: 9.5-10.0mm;breadth:4.5-5.0mm.