Aeshnidae of Guangdong and Hong Kong (China), with the descriptions of three new Planaeschna species (Anisoptera)

2008·10.2 MB·English

by  Wilson, K D P

Odonaiologica37(4):329-360 December 1,2008
Aeshnidaeof Guangdong
andHong Kong(China), with the descriptions
of threenewPlanaeschnaspecies
(Anisoptera)
K.D.P.Wilson¹ andZ.Xu²
1 18ChatsworthRoad,Brighton,BNI5DB, UnitedKingdom
[email protected]
2DepartmentofEntomology,CollegeofNatural Resources and Environment
SouthChinaAgricultural University,Guangzhou510642,
Guangdongprovince,P.R.ofChina
[email protected]
Received September1, 2007/ReviewedandAcceptedMarch28,2008
Taxonomic informationisprovided ontheChinese aeshnid fauna from Guang-
dongandHongKong,based onsurveys completedfrom 1998to2005. Planaeschna
hauisp.n.(holotype:6,Shimentai,Guangdong),P.nanlingensissp.n.(holotype:S,
Nanling,Guangdong)andP.skiaperipolasp.n.(holotype:6,Shimentai,Guangdong)
aredescribed. Periaeschnarotunda Wilsonissynonymisedwith Cephalaeschnaklotsi
Asahina. PetaliaeschnagerrhonWilsoniscombined withthegenusPeriaeschna Martin
and thefirst $ described.BoyeriakarubeYokoiisnewlyrecorded fromChina.Keys
areprovidedforthe determination ofOriental Brachytroninigeneraandidentifica-
tion ofChinesespp. ofSCephalaeschnaSelys, Periaeschna Martinand Petaliaeschna
Fraser. Atotalof25aeshnids are recorded fromGuangdong,including3newspp.,
and 3newprovincialrecords. 12aeshnids arerecorded from HongKong,including
Planaeschna skiaperipolasp.n.(paratype: 9,WuKauTang,HongKong).
INTRODUCTION
The majorityof odonatesexaminedwere obtainedfromtwo sets of surveys
completed between1998and2005.Thefirstset ofthesesurveys was undertaken
by teamsorganised by theHong Kong basedKadoorieFarmandBotanicGar-
denCorporation (KFBG) between 1998and2002. Themain collectorsduring
these fieldtripswereKeith DP Wilson(KW), Graham TReels(GR),BillyHau
Chi-hang (BH) and Michael Lau(ML). Thesecond set of surveys was under-
330 K.D.P.Wilson &Z.Xu
taken by teams of undergraduate and postgraduate students led by Xu Zaifu
(XZ), ProfessorofEntomology, South ChinaAgricultural University (SCAU),
during the period 2002-2005. KW accompanied XZ during some of the sur-
veyscompleted and identifiedall thespecimens collected.Thesurvey datafrom
KFBG andSCAU is supplemented fromadditional survey workconductedin-
dependently by KW during the period 1992to 2005and otherpublished data.
Thedetailsof locationssurveyed are provided inTableIbelow anda checklist
ofaeshnidsrecorded fromGuangdong and Hong Kong is provided in Table11.
Thechecklist also includessource detailsoftheoriginal record.
TheOdonataof Hong Kong hasbeenreported indetailbyASAHINA(1965,
1987, 1988)and WILSON(1995, 1997,2003, 2004). TheZygoptera of Guang-
dong was reported by WILSON & XU (2007) but hithertoinformationon the
Anisoptera fromGuangdong has beenlimited.A reportonthe odonates from
the Manand Biosphere Reserve at Dinghushan, Guangdong (WILSON, 1999)
includedadescriptionofCephalaeschna dinghuensis. KARUBE(2002)described
asecondaeschnid;PlanaeschnagressittifromYimNaShan,Guangdong. EAST-
ERN&LIANG(2000) reported threeaeshnids,Anaciaeschnajaspidea, Anaxim-
maculifronsandA.parthenopejulius fromMacau,whichislocatedatthewestern
,
mouth of the Pearl River deltain central, southernGuangdong. Theodonate
faunafromneighbouring Guangxi (WILSON&REELS,2003;WILSON,2005)
and HainanIsland (WILSON & REELS, 2001) has been enumerated.Hainan
was historically includedas partof Guangdong Province butwas madeasepa-
rate province in 1988.
KFBG published preliminaryreports on thesurveys conductedby the South
China surveys teams undertaken in Guangdong (FELLOWES et al., 2002a-c,
2003a-c, CHAN et al., 2004a-b)but these reports containlimitedinformation
onthespecimens examined.Detailsofmaterialcoveredbythesereportsarepro-
vided here andselected synonymic notes are provided here for aeshnid species
ofinterest, newly recorded fromGuangdong andHong Kong. Detailsofspeci-
mens collected, forwhichselected synonymic notesare not provided below, are
tabulatedinTableIII.
BOYERIA KARUBEI YOKOI,2002
Figures4-5
Boyeriasinensis necAsahina,1978: WILSON,2005: 114(Guangxi).
Boyeriakarubei Yokoi,2002: 12-14 (type-loc.Lak Sao,Laos,teneral d and teneral
9).
Material. - I d,Longtanjiao,2-VII-2000,coll. KW; -19,Longtanjiao,3-VII-2000,coll.
KW; - 1 9,Chengjia, 5-VII-2000,coll. KW; - 1 9,Nanling, 23/25-VII-2003,coll. ZX; - Id,
Shimentai,7-VI11-2003,coll.KW.
Aeshnidae ofGuangdongand HongKong 331
REMARKS. - ASAHINA
(1978) describedBoyeriasin-
ensisfromasinglemalefrom
‘Chengtu’, Sichuan,whichhe
described as, ‘not very ma-
ture’. The Guangdong and
Guangxi specimens areiden-
tical to theoriginal descrip-
tion of B. karubeiprovided
by YOKOI (2002) with mi-
norexceptions(Tab. IV);no-
tably thecolourationof an- Figs 1-5.[1-3]Boyeriamaclachlani,Japan,male:(1)abdomen,
tealar carina, which is pale dorsal view; — (2)abdomen,lateral view; - (3)synthorax,
brown,andabsenceofyellow lateralview. —[4-5]B.karubei,Guangdong,male;(4)syntho-
synthoracic dorsalstripes in rax,lateral view; - (5)abdomen,lateralview.
mature females.Boyeria karubeiwas describedfromteneralspecimens and the
colourdifferencesnotedcanbeaccountedforby ageing. YOKOI(2002) consid-
eredsinensiswasadifferentspecies tokarubeibasedonits(i)lack of yellowdor-
sal stripes on the synthorax, (ii) superiorappendages withoutdistinct subbasal
ventraltubercleand(iii)superiorappendages withroundedratherthanpointed
apices. In ASAHINA’s (1978) description ofsinensis he describedthe dorsum
ofthesynthorax as,‘brownish, frontstripe ambiguous (perhaps absent)’. Given
that femalespecimens of Chinese Boyeria inour possession have faded yellow
dorsalstripes andthe stripes ofoneof theseis barely visible this charactercan-
not bereliedupon to differentiatesinensisfromeitherAsianspecies ofBoyeria.
Faded femaledorsalstripes arealso afeatureobservedin B. maclachlani(Selys,
1883) fromJapan(SUGIMURAetal.,2001). OneoftheGuangdong malespos-
sessessuperiorcaudalappendages withasmallbaso-ventralbulgebutnot nearly
as extensive as the protuberance depicted inAsahina’s drawingofsinensis. The
finalcharacterto differentiatekarubeifrom sinensisis the pointed apices ofthe
superiorappendages. Itisapparentthereareclearstructuraldifferencesto seper-
atesinensisfrommaclachlanibutthereare noovert structuraldifferencesto dis-
tinguish karubeifrommaclachlani.Thefaceofkarubeiis paler thanmaclachlani
andtheabdominalyellow colourpatternis moredeveloped inkarubei(Figs 4-5)
thanmaclachlani(Figs 1-3).
DISTRIBUTION. — China(Guangdong, Guangxi) and Laos.
GYNACANTHA BAYADERA SELYS, 1891
Gynacanthabayadera Selys, 1891: HUA, 2000: 10 (Guangdong,Henan,Jiangsu,
Jiangxi,Sichuan).LIEFTINCKetal.,1984: 40-41 (Taiwan).
332 K.D.P.Wilson& Z.Xu
REMARKS. — G.bayadera is easily distinguished fromotherChineseGynacan-
tha by theabsence ofablack ‘Tmarkonthecrest ofthefrons. It is closely re-
lated to G.saltatrix.
DISTRIBUTION. — It ranges from India, through peninsula Malaysia andthe
Philippines to New Guinea. ThedistributioninChina is uncertain.Ithasbeen
reported fromTaiwan,by L1EFTINCKetal(1984)as,‘probably widespread all
over theisland’.Italsooccurs inHainanIsland(Wilson,unpublished data).ASA-
HINA(1966) notedthatMARTIN(1911)hadrecorded G.bayadera fromChina
but hadprovided an illustrationof a Gynacantha species, labelledas bayadera
withaclearT-markonthe frons. ASAHINA(1978) also notedaspecimen col-
lectedfromSichuanofG.saltatrixintheGrahamcollection, preserved intheUS
MuseumofNaturalHistory, andsuggested itmightrelateto theChineserecord
of‘G bayadera' referred to inNEEDHAM (1930). SUI&SUN, 1984recorded
bayadera fromJiangsu province but illustrateda photo, labeledas G. bayadera,
whichclearly showsablackT-markonthefrons.TheChinesedistributionof G.
bayadera is probably restrictedto southChina.
KEYTO CHINESE BRACHYTRONINIGENERA WITHWINGS
POSSESSINGCROSS-VEINSINTHEBASALSPACEI.E.
CEPHALAESCHNA SELYS, 1883,GYNACANTHAESCHNA FRASER, 1922,
PERIAESCHNAMARTIN, 1909 ANDPETALIAESCHNA FRASER, 1927
1 Pterostigmawithout brace-vein; dorsalcarina prominentand paleyellowcoloured; broad wings
with densevenation;longandnarrow trianglewith 6-7cells;anal triangle4-6 celled;membranule
vestigial;narrowfrons withconedtop; arcusuallydistaltoouterprimaryantenode;female geni-
talplatebroadlyangledand tippedwithsmall hair-like spines Petaliaeschna
—Pterostigmawith brace-vein;carina lessprominentandusuallydarkcoloured 2
2 Lastfemale sternitedevelopedinto asharplyangleddentigerousplatewhich endswith apairof
long,forcept-shapedspines;widthoffronslessthanhalfwidth ofhead;arcusuallyslightlyproxi-
maltoouterprimaryantenode;analtriangleusually3-celled Periaeschna
—Lastfemalestemiterounded notasabove;widthoffronsusuallysignificantlymorethan halfhead
width oroccasionallyequaltoorvery slightlyless than halfhead width 3
3 Brace-vein situatedatproximalborderofpterostigma;analtriangleusually4-6celled;lastfemale
sterniterounded andnotdevelopedintoaprominentdentigerousplate Cephalaeschna
- Brace-vein situatedslightly externaltotheproximalborderofpterostigma;arcsituatedatthelev-
el oftheouterprimaryantenode;anal triangle3-celled;femalesternitedevelopedintoanacutely
pointed,two-prongeddentigerousplate.Distribution:SingleextralimitalspeciesG.sikkim (Karsch,
1891)known fromBangladesh,India &Nepal Gynacanthaeschna
CEPHALAESCHNA DINGHUENSIS WILSON, 1999
Figures6-13
Caliaeschna (?)acutifrons(nec Martin, 1909):RIS, 1916: 55-56(I 9, Tsa-Yu-San,
Guangdong,pi.2, fig.5,Guangdong).
Cephalaeschnarisi necASAHINA, 1981: 6-11 (partmaterial: 1 9,Tsa-Yu-San,
Guangdong).
Aeshnidae ofGuangdongand HongKong 333
CephalaeschnadinghuensisWILSON, 1999;31-34,figs14-18 (type-loc. Dinghushan,
Guangdong).
Cephalaeschnasp. FELLOWESetal., 2002c: 18 (6-V-1998,Dinghushan,Guang
dong).
Material. — 1 9,Dinghushan, 14-VI-1993,coll.KW; — I 9,Dinghushan,6-V-1998,GR
leg.
REMARKS. - ASAHINA
(1981) described Cephalae-
schna risi from specimens
collected from Fujian and
Taiwan. ASAHINA (ibid)
stated, “Ris’s original ‘acuti-
frons’ seems tobelostby the
War”butconsideredRis’s de-
scription of the female col-
lected by Mell in 1910 from
Guangdong (RIS, 1916)
largely agreed with his Fu-
jianese andTaiwanesemate-
rial. However, healso noted
itslarger size, broaderwings
withcloservenationandlarg-
erpterothoracic stripe.ASA-
HINA (1981) did not men-
tion Ris’s description of the
cerci,“Appendices sehrklein,
spitz, etwa doppelt so lang
whichagreeswith ding- Figs6-13.Cephalaeschnadinghuensis,Guangdong:(6-7)male,
huensisrather thanrisi. The head,frontal view; —(8)malesynthoraxand baseofabdo-
men,lateral view; — (9)malecaudal abdomen,dorsal view;
hindwingshape andvenation
— (10)male caudal abdomen,lateral view; - (11) female
illustrated in RIS(1916) are caudal abdomen; — (12) female abdomen,basal view; —
similartodinghuensis(cf.Fig. (13)femalehindwing.
13).
DISTRIBUTION. - China(Guangdong).
CEPHALAESCHNA KLOTSI ASAHINA, 1982
Figures 14-20
Cephalaeschnaklotsi: ASAHINA, 1982:9-10,figs7-11(type-loc. Tachulan,Shaowu,
Fujian);— FELLOWESetal.,2003c: 26(Chebaling,Guangdong);—WILSON,
2004: 198-199,(9 and exuviae,NgTungChai,HongKong,25-IV-2003);HUA,
2000: 10(Fujian,Zhejiang);- WILSON&TAM,2006:85-86,figs 17-22(1 $, 1
334 K.D.P.Wilson&Z.Xu
9&exuviae,NgTungChai,HongKong).
PeriaeschnarotundaWILSON,2005:118-120,figs6a-e(type3,Dayaoshan,Guangxi,
19-IX-1998)syn.nov.
Material.-U,Longtanjiao,3-V1I-2000,coll. KW; 1 3. Chebaling, 16-VIII-2000,B.H
leg.
REMARKS. — Periaeschna
rotunda was describedfrom
a single malespecimen with
anarrow fronslessthanhalf
width of head. Chinese Ce-
phalaeschna klotsi and C.
chaoialso possess a narrow
frons (frons width ca half
widthof head)incontrast to
othermembersoftheCepha-
laeschna which all featurea
relatively large frons with a
width greater than half the
headwidth.Adirectcompar-
isonofklotsiandrotundama-
terial shows thereare minor
differencesin colourpattern
Figs 14-20. [14-18]Cephalaeschnaklotsi,Fujian,male,from
ASAH1NA (1982):(14) head,frontal view; — (15) syntho- but no overt structural dif-
rax, lateral view; — (16)caudal genitalia, lateral view; — ferences are apparent. The
(17)caudal genitalia,dorsal view. — [19-20]Cephalaeschna caudalappendages ofrotun-
klotsi, male, HongKong: (19) synthorax, dorsal view; - da are very similarto klotsi.
(20)hindwing. A carefulexamination of C.
klotsi material, collectedfrom Hong Kong and Guangdong, revealed a unique
and distinctivefeaturethatis shared withthe rotundatypemale, indicating itis
asynonymof C. klotsi. Theunique featureis asmall andstout spine locatedat
theouter, upperbaseofthemalesynthoracic dorsalstripe(Fig. 19).Thisfeature
isalso present onthe Guangxi ‘rotunda’ male. A thorough examinationof the
Guangxi and Guangdong specimens confirmsthesynonymy ofthesetwo taxa.
distribution. — China(Fujian, Guangdong, Guangxi, Hong Kong & Zhe-
jiang).
KEYTOCHINESE MALECEPHALAESCHNA
1 Width offrons significantlymorethan 'Ahead width 2
—Widthoffrons equaltoorslightlyless than 'Aheadwidth,orslightlymorethan 'Aheadwidth3
2 Legsreddish brown;lateral synthorax dark brownwith yellowstripe(Figs 21-24).Distribution:
Aeshnidae ofGuangdongand HongKong 335
Figs 21-27. [21-24] Cephalaesenna
patrorum, male, from ASAHINA
(1981): (21)head, frontal view; —
(22)synthorax,lateralview;— (23)
caudal genitalia,lateralview;—(24)
caudalgenitalia,dorsalview. - [25-
27] Cephalaeschnaobserva, female,
fromASAHINA(1981):(25)head,
dorsal view; — (26) basal abdo-
men; — (27)caudal abdomen,lat-
eralview.
Henan,Shanxi& Sichuan patrorum Needham,1930
—Legsblack; lateralsynthorax yellowwith singledarkband (Figs25-27).Distribution: Sichuan...
obversa Needham, 1930
3 Superiorappendagesbroad and blunt without pointedtips(Figs 14-20). Distribution: Fujian,
Guangdong,Guangxi,HongKong&Zhejiang klotsi Asahina,1982
—Superiorappendageswith pointedtips 4
4 Legsuniformlyblack ordarkreddish brown 5
—Legsdarkbrown with paletibia darkened atfemoraljunction 6
5 Superiorappendagesbroadattipwithsmallsharplypointedapicalprominence(Figs28-33).Dis-
tribution: Fujian.Guangxi& Jiangxi needhami Asahina,1981
—Superiorappendagesslender andsharplypointedattipped(Figs 34-38).Distribution: Fujian ....
chaoi Asahina,1982
6 Superiorappendagesflatwhenviewedlaterally;femalewithreduced dentigerousplate&longcerci,
morethan2xSIO(Figs6-13).Distribution: Guangdong dinghuensisWilson, 1999
—Superiorappendagesbulbous whenviewed laterally;femalewithoutdentigerousplateand short
cercilessthan 2xS10(Figs 39-46).Distribution; type-loc,Fujian&Taiwan.. risi Asahina,1981
PERIAESCHNA F.FLINTI ASAHINA, 1978
Figures47-56
Cephalaeschnalugubris(necMartin, 1909):NEEDHAM, 1930: 81-82(pi.8,fig. 13,
13a,Fujian,Sichuan); - KLOTS, 1947: 10(1d,Sichuan);- HUA,2000: 10(Fu-
jian, Sichuan,Zhejiang.)
Periaeschna flintiASAHINA, 1978:240-243,figs 13-22 (1 5,Yim NaSan [550m],
Guangdong,13-V1-1936,coll. BMNH,J.L.Gressittleg.;Fujian,Jiangxi,type-loc.
Sichuan): — CHAN etal.(2004b): 20(Quncaitang,Luokeng,Guangdong),
Periaeschnaf.flinti:ASAHINA, 1982: 11(Fujian).
Cephalaeschnasp.:FELLOWESetal.,2003b: 19(1 9,Shimentai,Guangdong,13-
VIII-2000).
Material. - 1 d,Quncaitang,Luokeng,Guangdong,18-1X-2002,leg.BH;1 9,13-VIII-2000,
Shimentai,Guangdong,BH leg.
DESCRIPTION. — Male. — Small-sized Periaeschna with predominantly
336 K.D.P.Wilson &Z.Xu
yellow faceand superior ap-
pendages with pointed and
downwardly hooked tips.
Labium ferruginous-brown
with creamy central lobe.
Labrum,anteclypeus ferrugi-
nous-brown(Fig. 47). Front
of postclypeus blackish-
brownwithnarrow, well-de-
finedyellow margin atlower
sidesandbase.Crestoffrons
yellow at sides and ferrugi-
nous brown centrally. Syn-
thorax blackish with a pair
of very broad, triangular-
shaped greenish-yellow dor-
salstripeswhicharebroadest
below the blackalar sinuses
andnarrow to apoint below
(Fig. 48). Mesepimeron with
broadgreenish-yellow stripe
whichnarrowsatupperthird.
Largetriangulargreenish-yel-
Figs28-38.[28-33]Cephalaeschmneedhami,fromASAHINA lowspotatuppermetepister-
(1981):(28)male,head,frontalview; - (29)male,synthorax, num.Metepimeron greenish-
lateral view; — (30)male,caudal genitalia,dorsal view; — yellow,except forbroadblack
(31)male,caudal genitalia,lateralview;—(32)female,caudal
genitalia;- (33)abdomen,dorsalview. — [34-38]Cephalae- margin along interpleuralsu-
schna chaoimale,fromASAHINA(1982):(34)head,frontal turewithmetepisternumand
view; — (35) synthorax,lateral view; — (36)caudal genita- metaposternumgreenish-yel-
lia,lateralview;— (37)caudal genitalia,dorsalview;— (38) low. Legs blackish-brown.
abdomen,dorsal view.
Wings slightly enfumedpale
amber. Arc proximal to outer primary antenode. Forewing triangles six-celled
andhindwingfive-celled.Membranulepalebrownish.Abdomenasillustratedin
Figure 51 withgreenish-yellow maculationabovepaleyellowbelow. Caudalap-
pendages withtipofsuperiorappendage pointed andhookeddownwards(Figs
49-50).
Female. — Faceoffronsbright yellowbelowandatsides withuppertwo-
thirdsferruginous-brown narrowly dividedat centre by pale ochreous vertical
line,whichismoreobviousbelow(Fig. 53). Prothoraxpale whitish-brownatsides
andpale brownabovewithpale yellowtriangularspot atcentreofdistalmargin.
Synthorax blackishwithmarkingsas malebutyellowratherthangreenish-yellow
anddorsalstripebroadbutslightly narrower thanmale(Fig.54). Wingsslightly
Aeshnidae ofGuangdongand HongKong 337
enfumedwhichbecomespale
amberatbaseproximal totri-
angles.Arcproximal toouter
primaryantenode.Forewing
and hindwing triangles five-
celled. Membranule pale
brownish.Abdomenblackish
withdorsumofSIwithcen-
tral irregular-shaped linear
yellow spot. SideofSI black
above mainly yellow below
(Fig. 52). DorsumofS2with
basalanddistalyellow spots
connectedbyfineyellow line
along dorsalcarina. Sidesof
S2 black above mainly yel-
lowbelow. Dorsum ofS3 & Figs39-46. Cephalaeschnarisi,fromASAHINA(1981):(39)
S4with basalanddistalyel- male,head,frontalview; —(40)male,head,dorsalview; -
lowspotsandsideswithlarge (41)malesynthorax,lateral view; —(42)malecaudal abdo-
triangular basal yellow spot men,dorsalview; —(43)malecaudalabdomen,lateralview;
—(44)maleabdomen,dorsalview; —(45)female,abdomen,
andsmalldistalcircularyel-
dorsal view;—(46)caudalabdomen,lateralview.
lowspot. DorsumofS5&S6
withsmallbasallinearyellow spotandsmalldistalyellow spotandsmallyellow
marks atbaseofsides ofS5-8. Basalthirdof S9 darkferruginous-brown. Last
stemitedeveloped intoa dentigerous plate comprised ofapair oflong, forcept-
shaped spines, narrowly separated(Figs 55-56.)
Measurements (mm):<J abd. +app.50,0-52.0,hw41.0-42.0; 9 abd. + app.48.0-51.0,hw
41.0-45.0.
REMARKS. — Periaeschna mira was describedby NAVAS (1936) from two
malesand afemalefrom ‘Ruling’, Jiangxi. ASAHINA(1978) did not provide
a differentialdiagnosis when he describedflintiandmadenomentionofmira.
Thedescription provided by NAVAS(1936)was purely verbalwithno drawings
provided. Neverthelessthereis avery closematchbetweenthe Guangdongflinti
specimens, Asahina’s description offlintiandNavas’s description ofmira.Like
flintithemiraspecimens werealso small-sized; 6 abd.47.0mm,hw43.5; $ abd.
53mm,hw44.5.Thereisadistinctpossibilitythatflintiisasynonymofmira. The
subspecies P.flintiassamensis Asahina, 1981was describedfromAssam (north-
eastIndia)
DISTRIBUTION. — China(Fujian, Guangdong, Jiangxi & Sichuan).
338 K.D.P.Wilson &Z.Xu
PERIAESCHNA GERRHON WILSON, 2005comb.nov.
Figures57-64
Petaliaeschna gerrhon WILSON, 2005: 120-121,fig. 7a-c (1 3, Maoershan,
Guangxi).
Material. - 1 9,Nanling,23/25-V11-2003,coll.ZX; 19,ChonghuaLiuxihe,14-IV-2002(no.
020300),coll. ZX.
DESCRIPTION. — Male. — Large-sized, withyellowish face,anddensewing
venation.Furtherto the descriptionprovided inWILSON (2005) theanaltrian-
gleis 6-7cells andtriangles 6-7 cells. Figures of themalefromWILSON(2005)
arereproduced here(Figs 57-59).
First female.— Large-sized Periaeschna withdense wing venationand
ferruginous-yellowish face. Labium, labrum, anterclypeus, postclypeus, frons,
vertex, occiput and anten-
naeentirelypale ferruginous-
yellow (Fig. 62). Synthorax
blckish-brown with narrow
yellow dorsalstripe, whichis
clubbed at upperend below
the alar-sinus (Figs 60-61).
Dorsal carina pale yellow.
Mesepimeron with broad
yellow stripe which nar-
rows quite abruptly at upper
third.Triangularyellowspot
atuppermetepisternum and
fine linearspot which does
not extend to spiracle. Me-
tepimeron blackish-brown
yellow, except for broad
brownish-blackmargin along
interpleural suture with me-
tepisternum and with broad
yellow stripe. Metaposter-
Figs47-56.[47-52]PeriaeschnaflintifromASAHINA(1978): num pale ferruginous. Legs
,
(47)male,head, frontalview; — (48)male,synthorax,lateral reddish-brown. Wings en-
view;—(49)male,caudalgenitalia,dorsalview; —(50)male, fumedthroughout withpale
caudal genitalia,lateral view; — (51)maleabdomen,dorsal amberat base(Fig. 64). Ab-
view; — (52)femaleabdomen,dorsalview.— [53-56]Periae- domenblackish-brown.Low-
schnaflinti,female,Guangdong:(53)head,frontal view;—
(54)synthoraxand basalabdomen,lateralview; — (55)den- er sidesof SI-S3 predomin-
tigerousplate,ventral; — (56)caudalabdomen,lateral view. nantlyyellow. Pairof yellow