Melolonthidae (Coleoptera) from Thailand, III

8 Pages·1996·8.5 MB·English

by  Itoh, T

Elyt1・a,Tokyo,24(1):71-78,May l5,1996
Me1o1onthidae(Coleoptera) fromThailand, III
Takeshi ITCH
Higashi-naruo-cho2-1-13-212,Nishinomiya,Hyogo,663Japan
Abstract Threespeciesoftheme1o1onthinegenusB・,ahminaarereportedfrom
ThailandandLaos.Twonewspeciesincludingonenewsubspecies,B.,nlkadomikado,
B mikadomikotoandB.,myakoaredescribed.
In thepresentstudy, I amgoing to report 3speciesincluding2newspecies
of thegenusBrahmina. ThegenusBrahmlnawasestablishedby BLANCHARDin
1850withabriefdescriptionandatthesametime2newspecies,calvaandcomata
wereintroduced fromnorthern India. REITTER(1902) diagnosed thegenusand
appliedthegenericnametotherhizotroginegroupwithhairydorsalsurfaceand
cleft claw, and newly established 3 subgenera of Brahmina. 0n the contrary,
BRENsKE (1892) applied the name to many heterogeneous groups with a
combination of common characters of 10-segmented antenna and cleft claws.
MOSERstillextendedinterpretationofthegenusanddescribedmanynewspecies
ofBrahmlna. Threespeciesintroducedhereinbelongtooneofthegroupswhich
weremainly attributed by MOSER to Brahmina. Abbreviations used herein are
showninthefirstandsecondpartsofthisseries. Thefollowingabbreviationsare
added for lengthofeachcharacter and for others:AC-lengthofantennal club,
FT -length of antennal footstalk; FT:)C-total length of apical :X;segments of
antennal footstalk; EW-elytra1width;COS-widthofsuturalcostaonelytron;
TIS-1engthoflongermetatibia1spur;Ta-X-lengthofXthmetatarsalsegment;
MNHA-co11ectionoftheMuseumofNatureandHumanActivities,Hyogo.
1. BrahminaparvulaMOSER, 1915
(Figs.1,4,8,12, l4, l7(a-b),19,22,27,30)
Brail'm'taparvu/aMOSER,1915,137-138(Yunnan).
Length: 8.6-9.5
zag oszs. mm.
Male: - Headandpronotumrather reddishyellowascomparedwithelytra.
CW/CL3.6-4.4(A3.8,n=20).Fronsmoreorlessconcaveonposteriorhalf,not
tuberculate. Vertex not carinate, but remarkable. IN/HW 0.57-0.63 (A 0.61,
n=20).AC>FT6,butAC<FT.Mentummoreor lessconvex.
Pronotumsomewhatsparsely and coarsely punctate,PL/PW 0.57-0.63 (A
72 Takeshi ITCH
0.60, n=20); anteriorangles rectangularor subrectangularlyobtuse, posterior
onesobtuse;hairson theanteriormarginnotso long; bothantero-1atera1and
postero-1atera1marginsstraightandnot reflexed. Eachelytronwithagradually
widened, weak sutural costa and a very inconspicuous onenear it, COS/EW
0.19-0.23(A0.21,n=20);epipleuronvisibleatmost until thelevelofmetacoxa
in dorso-1atera1 view and thence vanished; marginal membrane conspicuous.
Abdominalcentral areawithout pubescence.
Metacoxawithoutafurrowalongtheinnersideoflateralmargin.Metafemur
ratherstout;FW/FL0.30-0.35(A0.33,n=20);bristlesonthesurfaceofmetafemur
about 2/l3-l/4 timesas longas itswidth. Metatibia rather stout. TIS≦Ta-I,
Ta-I<Ta-II.Clawwithaveryslenderapicaltoothandaverystoutandtruncate
inner one, the former often shorter than thelatter. Malegenitaliaasshown in
Fig 22; internalsacofmalegenitaliawithabandofminutebristles.
Female: - CW/CL3.4 1'.4 (A4.0,n=20). Fronsslightlyor hardlyconcave
beforevertex.IN/HW0.60-0.66(A0.63,n=20).AC>FT6orAC<FT6inChinese
specimens (AC<FT6 in the holotype), but AC≧FT6 in both Siamese and
Vietnamesespecimens.PL/PW0.54-0.61 (A 0.59,n=20), but thisparameter is
smaller inChinesespecimensthaninothers.COS/EW0.17-0.25(A0.21, n=20).
Metafemurandmetatibiaverystout, FW/FL0.35-0.41(A 0.38,n=20);bristles
on thesurfaceofmetafemurabout2/11-1/3timesas longas itswidth. Female
genitaliaasshownin Fig 27;afused coxitesubtrapezoida1inshapeanddevoid
ofanyremarkableprojectionsalongtheanteriormargin.
Distribution. China (Yunnan), Thailand [new record], Vietnam [new
record].
,
f
2
Figs. l-3. - 1, B,・a/mlnapar、ulaMOSER;2,B mikadosp nov;3,B.mlyakosp nov
Me1o1onthidaefromThailand. Iii 73
Specimense1:camined. 2 DoiPui, nearCM, N. Thailand, 11-V-1985, I.
,
MAToBAleg; 22 , sl., 3-VI-1986, HH leg; I , DoiSuthep, CM, 29-V-1983,
MS leg;11, Doi Sang, Thailand, 10~13-V-1990, K. KuMEleg; 1d, CM, N.
Thailand,V-1985,NKleg;14 ,16 ,DoiChiangKhian,CM,27~29-V-1983
[cPU]; Ic 5 Sapa, Hoang LienSon, N. Vietnam, 3~28-V-1993, N.
, ,
KATsURAleg;1 ,nearSapa,N.Vietnam,VI-l994;l “ChinaYunnan'',“parvula
,
Mos”, “Zoo1. Mus. Berlin''; 1 , sl., “Zoo1. Mus. Berlin''; l , sl., “Brahmlna
parvulaType Mos”, “Zoo1.Mus.Berlin''.
2. Brahminamikado T. ITCH,sp nov.
(Figs 2,5,9,11,15,18(a-b),21(a),23(a-b),28,31)
Description. Length:8.7-13.2mm.
Male: - Headdarkblackishbrown,antenna,ventralsurfaceandlegsbrown,
pronotumreddishbrown tobrown,elytralightbrown. Bothdorsalandventral
surfacesmoderatelyshining.
Clypeus subtrapezoida1, somewhat finely and somewhat densely punctate,
CW/CL3.3-4.4(A3.8,n=15);anterioranglesfullyroundedandanteriormargin
notemarginate, fronto-clypea1suturewellbiarcuate.Fronswithshorterecthairs,
transversely carinate close to fronto-clypea1suture, whose carina is medially
interrupted;theareabeforethecarinamuchsparselypunctateonthegreaterpart
andimpunctatepartly,but theintermediateareabetween thecarinaandvertex
isseemingly much concave and punctatecoarselyand densely as on clypeus.
IN/HW0.53-0.60(A0.58,n=15).AC=FT.Mentumslightlyconvex.
Pronotum somewhat sparsely and finely punctate, but thepunctures are
seeminglycoarsebecauseofdeepconcavityoftheirsurroundings;PL/PW0.54-0.57
(A0.56,n=15);anteriormarginnothairy;anterioranglesalmostrectangularand
posterioronessubrectangularlyobtuse; both antero-1atera1andpostero-1atera1
marginsreflexedandnotserrate,theformersinuatebutthelattersinuateoralmost
straight;discwithaconspicuousdepressionattheinnersideofeachantero-1atera1
margin near each anterior angle.Scutellumsomewhatsparselypunctate. Each
elytronwithasuturalcostagraduallywidenedposteriorly,aweak1stcostaclose
tothesutua1oneposteriorlyandanobsoletenarrow2ndcostaparallel totheist,
sometimesalmostvanished,COS/EW0.15-0.18(A0.16,n=15);epipleuronvisible
overtheleve1ofmetacoxaindorso-1atera1view;marginalmembranenotconstantly
visible,sometimesinvisible.Pygidiumcoarselypunctate.Abdominalcentralarea
slightly orhardlywithshort pubescence.
Metacoxawithoutafurrowalongtheinnersideoflateralmargin.Metafemur
somewhatstout,shiningandsparselypunctate,FW/FL0.30-0.33(A0.32,n=15);
bristleson thesurfaceofmetafemur about 1/6-1/4 timesas longasitswidth.
TIs<Ta_I,Ta-I<Ta-II.Clawwithamoderatelyslenderapical toothandavery
stoutandtruncateinnerone.MalegenitaliaasshowninFig 23; internalsacwith
74 Takeshi ITCH
several arranged cilia and a crescent spiculeapically and with awirely 1ong,
U-shapedspiculebasically,andinadditionbearingafewpatchesofcospicuously
thick,recumbentsetaedorsallyandventrally.
Female:- CW/CL3.1-4.3(A3.7,n=15),IN/HW0.55-0.62(A0.59,n=l5),
AC>FT6.Pronotumwithawidelyrimmedanteriormargin;bothantero-1atera1
and postero-1atera1marginsreflexedandalmost straight, PL/PW0.53-0.57(A
0.55, n=15). COS/EW0.13-0.17(A 0.15, n=15). FW/FL 0.35-0.40 (A 0.37,
n=15);bristlesonthesurfaceofmetafemurabout2/11-3/10timesaslongasits
width. TIS=Ta-I, Ta-I<Ta-II. Femalegenitaliaasshown in Fig 28; a fused
coxitesubtrapezoida1anddevoidofanyremarkableprojectionsalongtheanterior
margin.
Distribution. Northern to Central Thailand.
Holotype: d,DoiSuthep,CM,N.Thailand,23-V-1983, MSleg. Allotype;
,samedataas for theholotype.Paratypes: 5 , 4 , same data as for the
holotype; 6 , 6 ,sl.,29-V-1983,MSleg;2 , 19,sl.,23-V-1980,MTleg;
2 , 5 ,sl.,1~4-VI-1980,MTleg;3 , 5 ,sl.,26~28-V-1982,ANleg;
1d,PhupingPalace,CM,25-V-1983,MSleg; 50 35 ,CM,N. Thailand,
,
V~VI-1985; 4 9 ,sl., VI-1986, NK leg; 3 , 3 , DoiChiang Khian,
,
CM,27-V-1983 [cPU]; 1e,Fang,CM,14-V-1983 [cPU]; 19,SaneanSalai,
Nan, N. Thailand, 17-V-1993,S. 0HMoMo leg: 19, MaetaTeak-replantation
Forest,LangPhraeProv.,N.Thailand,18-V-1985,MSleg;2 DoiPaMuang,
,
Hang Chat, Lampang, N. Thailand, 19-V-1985, MS leg; lg, Pukhieo,
Chiayaphum,NE.Thailand,5-VI-1986,P. EK-AMNuAYleg; 3 Khao Yaj,
,
C.Thailand,15-VI-1983 [cPU].Hole-,alto-and2paratypesaredeposited in
MNHA,4paratypesinZMHU,9in cPUandtheremaining138intheauthor's
collection.
BrahminamikadomikotoT.ITCH,subsp nov
(Figs21(b),24(a-b))
Length 9.8-13.9mm.
Figs. 4-32. - 4-6.Frons(?);4,B.par、ula;5,Bmikadospnov;6,B.,myakospnov. _ 7.
Metacoxa[.amiyakosp nov.]. - 8-10.Puncturesonpronotum;8,B pal・vula;9,B.
mikadosp nov;10,Bmiyakosp nov. - 11-13.Lateralmarginofpronotum;11,B.
mikadosp nov;12,.a pa,・、,ufa;13,B.,niyakosp nov. - 14-16.Elytron;14,B.parvula;
15, B mikadosp nov;16,B. ,nlyakosp nov. - 17-18. Leftmetatibiainventral view
[(a) ,(b)?];17, Bparvula; l8, B mikadosp nov. - 19-21.Metatibia1apicalspurs
(?);19,.apal'vula;20,Bmlyakospnov;21(a),Bmikadomikadospnov.,(b),.amikado
mikotosubsp nov. - 22-26.Malegenitalia[(a)dorso-1atera1view, (b)lateralview];
22, B pa''vtila; 23, B mikadomtkadosp nov;24, B mlkadotmkotosubsp nov; 25, B.
1myakospnov;26,B.b''evppii1osa[holotype]. - 27-29.Femalegenitalia;27,B.parvula;
28,B.mlkadospnov;29,B,nlyakospnov. - 30-32.Clawofprotarsus;30,B.parvula;
31, a ,m adosp nov;32, a ,myaosp nov.
Me1o1onthidaefrom Thailand, Iii 75
つ
i
4 ') 6 7
3- e f 事11
8
9
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12 13
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.-.,,.... -、:.,
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:
, .・
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,
30 31 32
76 Takeshi ITCH
Thepresentsubspeciesisdistinguishablefromthenominotypica1onebythe
followingpoints:1)distinctlylargerparameresofmalegenitaliaandtheirstructure;
2)structureof internalsacofmalegenitalia [whichbasically resemblesthat of
thenominotypica1one,but is armedwith2 completelyseparated, wirely1ong
spicules insteadof aU-shapedspicule]; 3) inmale, theusuallyshorter oneof
metatibia1apicalspursmoredevelopedthanthelongeroneandbecomingspatulate.
Arithmetic data are as follows: (n=10)-CW/CL 3.5-4.1 (A 3.8); IN/HW
0.53-0.58(A0.55);PL/PW0.53-0.58(A0.56);COS/EW0.13-0.17(A0.16);bristle
length ofmetafemur/FW about 2/11-1/4. (n=10)-CW/CL 3.5-4.3 (A 3.9);
IN/HW0.55-0.59(A0.57);PL/PW0.54-0.57(A0.55);COS/EW0.13-0.17(A
0.15); FW/FL0.36-0.38(A0.37);bristlelength ofmetafemur/FWabout 2/11-
3/10.
fstrfOutzon. Laos.
Holotype: Vang Vieng, P. Vientiane, 25~26-V- l994, K. MIuRA leg.
,
Allotype: ,samedataasfortheholotype.Paratypes:106 94 ,samedataas
,
fo「theholotype;3 ,sl.,V-1991;4 ll , sl., 1-V-l994, WAKAHARA leg;
,
3 2 Xieng Khouang, Laos,V-1993, WAKAHARA leg. Hole-, alto- and2
, ,
paratypesaredeposited inMNHA,4paratypesinZMHU,and theremaining
217 in theauthor'scollection.
Notes. Infemale,theshorteroneofthemetatibia1apicalspursissomewhat
spatulate,but isnotsolongasin themale.
3. BrahminamiyakoT. ITCH,sp nov.
(Figs3,6,7,10, l3,16,20,25(a-b),29,32)
Description. Length: ll.5-15.7mm.
Male: - Head,pronotumandlegsreddishbrown,antennaandelytrabrown,
ventralsurfacedarkbrown,buttheabdomenissometimeslightbrown.Pygidium
browntodarkbrown.Bothdorsalandventralsurfacesdullyshiningandentirely
pubescent.
Clypeussubtrapezoida1,somewhat finelyandsomewhat denselypunctate.
CW/CL3.3-4.1(A3.8,n=8);anterioranglesfullyrounded,anteriormarginnot
emar9inateand fronto-clypea1suturewell biarcuate. Frons flat, coarsely and
denselypunctate.Vertexnotcarinate,thoughremarkable.IN/HW0.58_
0.65(A
0.62,n=8),AC≦FT.Mentumslightlyconvex.
P「onOtumsomewhatsparselyandcoarselypunctate,thepuncturesseemingly
coarsebecauseofdeepconcavityoftheirsurroundings,PL/PW0.55_0.58(A057,
n-8);anteriormarginwithsomewhatlong,erecthairs;anterioranglesrectangular
andPesto「Oi ronesobtuse;bothantero-1atera1andpostero-1atera1marginsstrajght,
theformerwidelyreflexedandthelatternormallyreflexednarrowly.scutellum
Spa「Selypunctate.Eachelytronwithasuturalcostagraduallywidenedposterjorly
andaweak1stcostasomewhatparallel tothesuturaloneand vanishedbefore
Me1o1onthidae fromThailand.Iii 77
theapical knob,COS/EW0.18-0.20(A 0.19,n=8);epipleuronalmost invisible
indorso-1atera1view;marginalmembranealmostinvisible,butsometimesvisible
partly.Pygidiummuchcoarselyandslightlyrugoselypunctate.Abdomenentirely
coveredwithshort pubescence.
Metacoxawithafurrowalongtheinnersideoflateralmargin. Metafemur
somewhat stout, shining, sparsely punctate and entirely pubescent, FW/FL
0.30-0.33(A0.31,n=4); bristleson thesurfaceofmetafemurabout3/10-9/25
timesaslongasitswidth.TIS<Ta-I,Ta-I<Ta-II.Clawwithamoderatelyslender
apicaltoothandaverystoutandtruncateinnerone.Malegenitaliaasshown in
Fig 24; internalsacwithapatchofshortbristlesinthebasalareaandagroup
ofveryminutegranularbristlesinthesubapicalarea.
Female: - CW/CL3.1' 1'.1(A3.8,n=3).Fronsflator feeblyconvex,IN/HW
0.61-0.64 (A 0.6, n=3),AC_FT6.PL/PW0.54-0.56 (A 0.55,n=3),COS/EW
0.15_0.19(A0.17,n=3),FW/FL0.37-0.38(A0.37,n=3);bristlesonthesurface
ofmetafemurabout3/10-2/5timesaslongasitswidth,TIS≦Ta-I,Ta-I<Ta-II.
FemalegenitaliaasshowninFig 29;afusedcoxitewitharemarkableprojection
alongtheanteriormargin.
Dist1・ibution. Northern Thailand.
Holotype: d,DoiPui,CM,N.Thailand,9-V-1985H.NARAleg.Allotype:
,samedataas for theholotype.Paratype: 1 ,samedata as for theholotype;
4 ,CM, v-1985, NK leg;2 2 DoiChiang Khian, CM, N. Thailand,
, ,
27_v_1983 [cPU].Hole-andallotypesaredepositedinMNHA,3paratypesin
cPU,1inZMHUandtheremaining5in theauthor'scollection.
s Table 1. Di perence betwee ra/1n1加a,111ya o sp nov and a 'e1'1p1/osa
o a l川ya・ s nov a l'e1'lりfl/osa
Fronto_clypea1suture distinctlybiarcuate feeblybiarcuate
pronota1antero_lateral widelyreflexednearthe normallyreflexedna「「oWly
margjn anteriorangle neartheanteriorangle
PL/PW(d) 0.55-0.58(A0.57) 0.54
(9) 0.54-0.56(A0.55) 0.51
Suturalcosta distinctand wide weakandnarrow
Widthofsuturalcosta/ -ca.0.18-0.20(A0.19) 〇十一Ca01e,,-・
elytra1width -ca.0.15-0.19(A0.17) 〇十一Ca013
Inner sideofmetacoxa1 witha furrow without a furrow
lateralmargin
Parameresofmalegenitalia slende1 stout
78 Takeshi ITCH
Notes. ThisnewspeciesiscloselyalliedtoB brevlp11osaMOSER,1918,but
isdistinguishablefromthelatterbythediagnosesgiveninTablet.
要 約
伊藤 武:タイのコフキコガネ科の研究, III. - 本橋においては, アカチャコガ,t、B,,ah_
mina属3種を取り扱った. B.parvulaMOSERをタイおよびベトナムから初めて記録し, 1新?_種
を含む2新種, .amikadomikado(タイ), Bmikado,nlkoto(ラオス)およびBmiyako(タイ)
の記載を行った.
LiteratureCited
ARROW,G.J., l946. EntomologicalResultsfromtheSwedishExpedition1934toBurmaandBritish
India. Coleoptera:Me1o1onthidae. A・lk. Zoo1.,38A(9):1_33.
.
MOSER,J.,1914. NeueMe1o1onthiden-ArtenderSammlungdesHermDr.H.J.VETH(Haag).Notes
Leyde11Mus.,36:148-161.
- 1915. BeitragzurKenntnisderMe1o1onthiden(Col).Dt elf. Z,1915:113_l51.
- 1918. BeitragzurKenntnisderMe1o1onthiden(Col).Stett elf.Ztg.,79:297-339.
REITTER,E.,1902. Bestimmungs-Tabe11ederMe1o1onthidaeausdereuropaischenFaunaundden
angrenzendenLandern. Vet・1/. nat. Ver. BI・tin11,37:162-303.
LiteratureshowninPartsI and II ofthisseriesisomitted.