Two new species of Euthalia (Lepidoptera, Nymphalidae) from northern Laos and northern Vietnam

8 Pages·2001·1 MB·

TThhee LLeepipdiopdteorpoltoegircaollSoocgieitycal Society ooff JJaapapnan
ut8ma 7)"atziseLpidSoc. 52(4)2:37-244,September2001
.Jdpan
Two "ew species of Euthatla (Lepidopt Neyrmaph,alidae) from northern
Laos Vietnam
and northern
Jir oUEHARAi) and Takashi YoKocm2)
i)326, Iwai,Hodogaya, Yokohama, Kanagawa, 24e-O023 Japan

2)1-10-26, Shonan, Owariasahi ,Aichi ,4gg-082 3Japan; }mail: [email protected]
Abstract Two new nymphalids, Euthafia khambounei sp. n. and Euthail asuprema sp. n., are
describe dfrom northern Laos and northern Vietnarn.
Key Lepidoptera,Nymphalidae, Euthafia,Limbusa, Euthatiakhambounei
words sp. n.,
Euthaha supremus sp. n., Euthaha leech i,Euthalin lu?rrha ,male genitalia ,northern Laos,
northern Vietnam, taxonomy.
Two new species of the genus Euthaha HUbner, 1819 were discovered from northern Laos
and northem Vietnam, both of them belonging to the continental species-group of the genus.
After close examination and comparison with the related species, we describ ethem herein-
after.
Euthalia (Limbus kah)ambounei sp. n. (Fig 1s-4)
cl. Length offorewing 45-46 mm, Wing shape: fbrewing :costa evenly curved, with apex
protruding ;termen slightly excised around vein 4, and dentat eat end of each vein; hind
margin straight, Hindwing: termen dentat eat end of each vein as in forewing ,Wing
dark in halfi
pattern :upperside offbrewing: ground color green, pale outer subbasal circular
marks peculiar to the genus conspicuous; a disca lrow of white spots running from spaces 6
to 2, white scales being not irrorate adt costa, and a white spot in space 2 convex towards
tornus; two white spots in spaces 8 and 6 in subapical area; a black subterminal band
running from costa to space lb, broadened areund space 4; cilia white, stained with black
beyond veins. Upperside of hindw{ng: ground color as in fbrewing ,tinged with blue from
spaces 7 to 5 in costal area; an obscure black oblong marking at discocellul aar ;disca lrow
of white spots reduced to spaces 7 and 6; a dark blue subterminal band running from spaces
7 to lb; cilia white, stained with black beyond veins, as in fbrewing .Underside,offbrewing:
ground coloT pale greenis hblue ;a black subt'errninal band running firo mcosta to space la,
broadened in space lb, Underside ofhindwing: ground color as in fbrewing ;basal irregu-
larly blackline inside discal
circular markings conspicuous; a present a row of white spots
from spaces 7 to 5, edging inside the white spots; a black subterminal band running from
spaces 7to lb. Venation :hindwingcell open. Antenna: black above and blackis hbrown
beneath ,without yellewing brown part at tip.
Male genitali a(Fi g1.5) , Uncus gradually narrowed towards tip , Valya slender, slightly
broadened near middle, bearing spines at tip.
g, Length of fbrewing 48-49 mrn, Wing shape as in male. Wing pattern :nearly as in
male, but the disca wlhite spots in forewing large rand a subteminal black band in upperside
of hindwing a litt lobescure than those in male.
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Two NewEuthafiafrom Laos and Vietnarn 239
9 10
13 14co!1.
Figs9-14. Euthatia (Limbus ar)vrrha. 9-10. Syntype \ of Euthalia leechi ,in
The Natural History Museum, London. 11-12. Syntype cii of Euthalia evrrh a,Incoll.
coll. The Natural History Museum, London. 13-14 .[Jn, northern Laos, in
Uehara.

Distribution.Northern Laos Vietnam.
and northern
Helotype. din ,Xamneua, Laos, 31 May 1999, now in coll. Uehara, will be deposit eidn
Kitakyushu Museum & Institu tofeNatural History, Fukuoka (KMNH). Paratypes .The
same localit ays holotype ,1 9,27 July I998; t 4,8Aug .1998; 1 \,25 Aug. 1998 ;1 \,10
Sept. 1998 (i ncoll. Yokochi); i cl,6June 1999 ;1 cl, 30 July 1999; 1 \,7 Aug. 1999; 1 4,
3 Sept.1999;1 Sept.1999;1 June2000;1 June2000(in Yokochi);
c{i,l1 c7,22 c3i,27 cell.
2 c{i,5 July 2eOO; 1 \,27 July 2000; 1 cl, 30 July 2000 (i ncoll. Yokochi); 1 4,9 Sept .2000;
Figs 1-- 8.Euthatl a(Limbus sap)p. 1-4. E. (L. )khambounei sp. n. (1-2 :Holotype ,clfl,now in coll.
Uehara. 3-4: Paraype ,\,in coll. Uehara) . 5-8, E, (L. s)uprema sp. n. (5- 6H:olotype ci-,
now in coll. Uehara. 7-8: Paraype, 4, in coll, Uehara),
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240 Jiro UEHARA and Takashi YoKocHT
1 cl, 24 Sept ,2000; 1 ci'i, 23 June 2oo1, 1 c7n, Tonkjn, N.Vietnam, no collecti]g date (i ncoll,
Museum Nationald'HistoirNeaturelleEntomologie,Paris),Paratypes in
are preserved coll.
Uehara otherwise stated in parentheses.
Remarks. This new species is readily distinguis hferdom other congeners by it sunique
pattern and coloration. The specific name is dedicat etdo MrKhamboune, the Laotian
guide who kindly cooperated with us to colloct this species in Laos.
E"thalia (Limb"s as)uprema sp. n. (Fig 5s-8)
c?. Length of fbrewing 40mm, Wing shape: fbrewing :costa evenly curved, with apex
acute; termen slightly excised around vein 4, and dentat eat end of each vein; hind margin
straight. HjndwjngJ termen dentat eat end of each vein as in fbrewing ,Wing pattern:
upperside of forewing :ground co]or pale olive green ;subbasal circular patche speculja rto
the genus conspicuous; a disca lband cornprised of pale yellow spots from spaces 6 to 2,
edged outside with black wedge-shaped marks in spaces 4 and 3; spots in spaces 6 to 2 Iarge
and fu11 yoverlapped, and spot in space lb rudimentary; costa above a disea lband irrorated
with pale yellow scales; two pale yellow spots in spaces 8 and 6 in subapical area; a
subteiminal row of dark green wedge-shaped spots running from spaces 6 to 2, and a dark
green shade jn space lb; termen pale olive green, Upperside ofhindwing: ground color as
in forewin ga; conspicuous black oblong marking at discoce11ul aar ;disca lrow of pale
yellow spots extending from spaces 7 to 2, edged eutside with dark green wedge-shaped
marks; a spot in space 5 convex outwards, and spots in spaces 4 to 2 rudimentary; a dark
green subterminal band running from spaces 7 to lb; termen pale olive green , Underside of
both wings: ground color pale greenish blue ;basal irregular cliyrcuiar markings ofhindwing
conspicuous. Venation :hindwing cell open. Antenna: black above and brown beneath
in shaiic and at tip, with a club black except tip.
'Uncus
Male genitali a(Fi g1.6) . gradually narrowed towards tip; valva somewhat slenderer,
slightly broadened near rniddle, with spines at tip . Aedeagus slender.
9, Length of fbrewing 48-51 mm. Wing shape as in male, but hindwing a litt lperotrud-
ing around vein 3. Wing pattern :upperside of forewing :ground color dark green ;sub-
basal circular patche speculiar to the genus conspicuous; a disca lrow ofspots white, running
from spaces 6 to 2; spots from spaces 6 to 3 touching each other, and that in space 2 separated
from that in space 3; costa above a disca lband irrorat ewdith white scales; two white spots
]n spaces 8 and 6 in subapical area; termen pale olive green ;ci]ia white, stained with black
beyond veins. Upperside ofhindwing: ground color as in forewin ga; conspicuous black
oblong marking at discocellul aar ;white spot in space 6 in disca larea; an indistinct
subterminal row ofblack spQts running flro mspaces 7 to lb; cilia white, stained with black
beyond veins, as in forewing . Underside of forewing :ground color pale greenish blue ,with
ablack shade in space lb in subterminal area. Underside ofhindwing: ground color as in
forewing ;basa lirregula rcilrcyular markings conspicuous; a series of disea lwhite spots in
spaces 7 and 6 and again from spaces 4 to 2, those in spaces 7 and 6 rudirnentary; an indistinct
subterminal row of dark green wedge-shaped spots running from spaces 7 to lb, Venation:
in Antenna: in
same as male. same as male.
Distribution,NorthernLaos.

Holotype. di,Xamneua, Laos, 11 July 2000, now in coll. Uehara, will be deposite din
Kitakyushu Museum & Institut eofNatural History ,Fukuoka (KMNH). Paratypes, The
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TwoNewEuthaliafromLaos and Vietnam 241
(
16
(ll1,5 S (IEEIIi.)J..k'X--Ly
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1 rt: 'L tf･./ !"t,'t.t,s-:- <{{L}l.llll;i!l>･iii-)--.rE･siEi>･･･'wr
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y
17
-
Figs t5-17. genitalia of Euthalia (Limbus as)pp. I5. E. (L.)khambounei sp. n.
16. E.Ma(lLe. )smprema sp. n, 17. E,(L,) lu;rrha.
same locali tays holotype, 1 \, 18 June 1999; 1 ?, 30 June 2000; 1 \, 28 Aug. 2000; 1 ci7,
8 May 2001; 1 c7, 20 May 2001 (i ncoll. Yokochi); 1 di, 24 May 2001; I cl, 23 June 2001.
Paratype sare in coll. Uehara otherwise stated in parentheses.
Remarks. The male of thi snew species closely resembles "Euthaha leechi "(Figs 91,0)
described by OberthUr in 1907 based on the males as types from Sichuan ,China. E leeehi
should be a synonym of EL nJ7t:K h(aFig 1s1 ,12) describe dby Leech in 1892 based on the
female from S. China. Here we presen ttheir synonymy.
Iiathalia(Limbusa) evnthaLeech,1892 (Fig 9s-14)
Euthaiia evrrha Leech, 1892: 137, pl.21, fig 4, (4), 5 \, China: Kwei-chow, Moupin, Omei-
Shan (The Natural Histor yMuseum, London),Syn[teypxeasmined].
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242 Jiro　UEHARA 　and 　Takashi　YoKocHI
Euthali　aleeeh　iOberthUr，1907：259．　 Syntypes　4♂，　China：Moupin ，　Siao−lou （The　Natural　History
　　　Museum ，　London ）［examined ］．Syn．　nov ．
，
E．pyrrha　has　also　been　r  orded 　from　northem 　Laos （Figs　l　3，14），　and 　the　discriminating
points　between　pyrrha　and 　the　presen　tnew 　species　are　summarized 　as　fbllows．
Male，　 Wing　shape 　similar　to　each　other ，　but　the　terminal　dentatio　nin　hindwing　stronger 　in
avrrha．　 Wing 　pattern； adiscal 　white 　band　of 　forewing　large　rin　this　new 　species ，　but　the
wedge −shaped 　marks 　in　spaces 　4　and 　3　edging 　outside 　the　white 　spots　not　so　obvious ；the
white 　spot ｛n　space 　50f 　hindwing　convex 　outwards 　in　both　species，　but　it　souter 　black
wedge −shaped ，　and 　white 　wedge −shaped 　marks 　more 　conspicuous 　 in　this　 new 　species ．
Antenna　black　above 　but　unif （）rmly 　brown　beneath　in〃 舳 α．　 Male　genit｝aia．　 Spines
，
around 　tip　of　valva 　nearly 　identic　ailn　both　sp   ies　but　vent エal　lobe　of 　valva 　more 　strongly
，
convex 　in　pyrrha （Fig．17）；uncus 　sho 亘er　and 　thicker　in　pyrrha（Fig．17）．
Female．　 The　fbmale　of 〃 肋 α 仕om 　northern 　Laos　has　not 　b  n　exarnined 　and 　the
，
仕）llowing　differenc　earse　based　on 　comparison 　with 　the　sp   imens　from　known 　localities
（China： Sichuan，　F司ian）．　 Wing　shape 　with 　the　terminal　dentatio　nin　hindwing　stronger　in
〃 rrha 　as　in　male ．　 Wing 　patter：nbasic　patter　nsimilar 　to　each 　other 　but　the　white 　spot 　in
，
space　30f　fbrewing　convex 　outwards 　in　this　new 　sp   ies　while 　it　is　nearly 　square 　in　pyrrha．
，
Antennal　differe　nacs　ein　male ，
Acknow
且edgments
in　writing 　this　paper　we 　thank 　Ms 　Nguyen 　Thi　Hong 　Museum 　Nadnal 　d’Histoire　Naturelle
， ，
Entomlogie 　Paris　Messrs　Phil　R．　Ackery　and 　Jim　Reynolds　The　Natural　Histoly　Museum
， ， ， ，
London 　and 　Dr　Wolfram　Mey 　Zoologische　sMuseum 　Humboldt 　Unjversi翫t　Berlin，　fbr
血eir　kin，dness　in　permittin　gus　t，o　examine 　the　specimens ，　includi　ntgypes　in　thei，　rcoIlectiens．
We 　are　grat血e l　to　Mr　Satosh　iKoiwaya 　Miyazaki　for　his　kind　pe  ission　to　examine 　his
， ，
collection ．
References
Le  h，　J．H ．，1892−1894．β躍♂召伽 皿from　C乃加α，ノapan 　o刀ゴ （］orea ．　 lv，681pp，，43　pls．　London ．
Oberth廿r　C ．1907，0bservation　ssur 　le　sesp6ces 　thib6taines 　du　genre　Euthaiia　et　description　de　fbrmes
　　　nouve，lles （L6p．，　Rhop．）．　BuiL ∫oα θ砿 Fn　l907（15）：257−262．
摘 要
ラオス北部お よびベ トナム 北部よ り記録され たイナズマ チョ ウ属の 2新種の記載 （上原　二
郎 ・ 横地　隆）
2
縁ラ種オスと北の部比較お よ・検びベ討 をト行ナムっ 北た部．より発見された大陸系イナズマ チョ ウ属の 新種を記載し， 併せ て近
Euthaiia （Limbusa）khamboune　isp．　nov ．（図 1−4）
♂，前翅長 45−46mm ，翅形：前翅 前縁は滑らか に湾曲し 翅頂は尖る；外縁は第 4脈付近でわずか
， ，
に抉れ，各翅脈端はやや突出する；後縁 は直線状．後翅，前翅 同様外縁は各翅脈端でやや突出する．表
面：前翅，地色 は暗緑色だが外半部は淡色 を帯びる；基部付近の本属特有の環状斑群 は明瞭 外中央白
紋列は第 2室から第 6室にお よび，第 2室は後縁角の方向に尖る；前縁には白色鱗が侵入 しない；亜翅
端部は第 6室と第 8室に白色紋がある；亜外縁部は第 Ib室か ら前縁部に か けて黒色帯があ り，第 4室
一
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Two 　New 　Euthatia　from　Laos　and 　Vietnam 243
付近が太い ；縁毛は白色で翅脈端は黒色．後翅，地色は前翅 と同様だが，前縁部の 第 5室か ら第 7室は
青色を帯びる；中室端の黒色だ円形紋は不明瞭；外中央白紋列は第6 室と第7 室に とどまる；亜外縁部
は第 1b 室か ら第7室 にか けて濃紺色帯が ある；縁毛 は前翅同様 白色で翅脈端 は黒色．裏面：前後翅 の
地色 は淡緑青色．前翅；亜外縁部は第 1a室か ら前縁部に か けて黒色帯があ り，第 Ib室が太い ．後翅，
基部の不正形環状斑 は明瞭；外中央自紋列の 内側は第 5室か ら第 7室 にかけて黒条があ り白紋の内側
を縁どる；亜外縁部は第 Ib室 より第 7室 まで黒色帯がある．翅脈：後翅中室端は開く．触角： 表面は黒
色；裏面黒褐色；先端に黄褐色部はない ．
一
♂ゲニ タリア （図 15）：先端方向に 様に先細る；valva は細長 く，中央部がやや太 く，先端部分は棘が
ある．
♀．前翅長 48−49mm ，♂ に同形．斑紋： ♂ に同形だが，前翅外中央白紋は♂ よ り大き く，後翅表面曲
外縁部黒色帯はやや不明瞭．
分布： ラオス北部，ベ トナム北部．
近縁種との比較：類似する もの はなく，容易 に鑑別で きる．
Euthalia（Limbus の suprema 　sp．　nov ．（図 5−8）
♂．前翅長 40mm ．翅形：前翅，前縁は滑らかに湾曲し，翅頂は尖 る；外縁は第4脈付近で わずか に抉
れ，各翅脈端はやや突出する；後縁は直線状．後翅，前翅同様外縁は各翅脈端で やや突出する．表面：
前翅，地色は淡灰緑色；基部付近の本属特有の環状斑群は明瞭；外中央白紋列 は淡黄色で第 1b室か ら
第 6室にお よび，第 lb室は痕跡的で，第 2室か ら第 6室までの紋 は大き く十分重な り，第 3室 と第 4
室の外側に黒色の くさび形の縁取 りが ある；前縁に は淡黄鱗が侵入する；亜翅端部は第6室と第 8室
に淡黄色紋が ある；亜外縁部は第 1b室に暗緑色部があ り，第2室か ら第 6室まで暗緑色の くさび形紋
列が ある；外縁部 は淡灰緑色，後翅，地色は前翅と同様；中室端の黒色だ円形紋は明瞭；淡黄色の 外中
央紋列は第2室か ら第 7室にお よび，第 2 室か ら第 4室の 紋は痕跡的で，第 5室は外縁側が尖 る．各紋
の 外側は暗緑色の くさび形縁取りが ある；亜外縁部は第 lb室か ら第 7室にか けて暗緑色帯が ある；外
縁は淡灰緑色．裏面：前後翅の地色 は淡緑青色 後翅，基部の不正形環状斑 は明瞭．翅脈：後翅中室端
は開く．触角1 表面は黒色；裏面は軸部 とこん棒部先端が褐色で，先端部を除 くこん棒部は黒色．
一
♂ ゲニ タ リア （図 16）： Uncus は先端方向に 様に先細る；valva はやや細長 く，中央部がや や太 く，先
端部分は棘がある．Adeagus は細長い ．
♀．前翅長 48−51mm ．♂ に同形だ が後翅第 3室端付近がやや 突出する．表面；前翅，地色は暗緑色；
基部付近の本属特有の環状斑群は明瞭；外中央紋列は 白色で第 2室か ら第 6室に お よび，第3室か ら
第 6室まで は連続するが，第 2室は第 3室と離れる；前縁に は白色鱗が侵入する；亜翅端部は第 6室 と
第8室に 白色紋が ある；外縁部は淡灰緑色；縁毛は 白色で 翅脈端は黒色．後翅，地色は前翅 と同様；中
室端の黒色だ円形紋は明瞭；外中央部は第6 室に白紋がある；亜外縁部は第 lb室か ら第 7室にか けて
不明瞭な黒色紋列がある；縁毛は前翅同様白色で翅脈端は黒色．裏面：前後翅の地色は淡緑青色．前翅；
亜外縁部第 lb室に黒色部がある．後翅， 基部の不正形環状斑は明瞭；外中央部は第2室か ら第 4室 と
第6 室第7 室に 白紋が あるが， 第 3室第 4 室以外は痕跡的；亜外縁部は第 1b 室よ り第 7室 まで 不明瞭
な暗緑色の くさび形紋が ある．翅脈： ♂ と同様．触角： ♂ と同様
分布：ラオス北部．
近縁種 との比較：本種の♂ は，1907年に OberthUrが♂をタイプとして中国四川省から記載 した CCEuth −
atia　teech”i（図 9，　10）と類似 してい る．ただ しこ の leechiは，1892年Leechが♀で記載 した py”rha
〔図 11，12）の シ ノニ ム とするのが妥当である．
・
Euthalia （ム枷 加∬α）P）rr乃α Leech，1892
E　pyrrha は本新種 と同じ くラオス北部か らも記録 されて お り （図 13，14），両種の鑑別点を以下 に示す．
♂，翅形：両種ともほぼ類似するが，pyrrhaは後翅各脈端の突出が強い．
斑紋：前翅外中央白紋列は本種の ほ うが大き くな り、第 3，4室の 白紋外側の くさび形の 縁どりは明暸
で ない ．後翅第 5室の 白紋は両種とも外縁側に尖 るが，本種で はその外縁側の黒色 くさび紋，白色 くさ
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び紋が よ り明瞭となる．触角：表面は黒色，裏面 は一様に褐色で ある．
♂ゲニ タ リア （図 17）：Valva 先端の棘はほぼ同一だが，　pyrrha で は ventral 　lobeの張 り出しが強い ；
uncus はpyrrhaの ほうがより短 く，太い ．
♀． ラオス北部か らp）’rrha の ♀はまだ記録が ない た め，既知 の産地 （中国四川省，福建省）の もの と
比較する．
翅形：♂ と同様に，pyrrhaで は後翅各脈端の突出が強い ．
斑紋：両種の基本的な斑紋構成は類似するが， 前翅第 3室の 白紋は本種で は外側に尖るのに対して，
pyrrhaで はほぼ正方形となる．触角：♂ と同様．
（Accepted　May 　l　7，2001）
Publishe　dby　the　Lepidopterologic　aSlociety　of 　Japan，
5−20，Motoyokoya 皿 a　2，　Hachioji，　Tokyo，192−0063　Japan
一
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