Naarda mirabilis sp. n.

(Figs 3, 27)

Holotype. m, Vietnam, LaoCaiprovince, SaPadistrict, FrontierSateliteCamp, 22° 19’ 17,7”N, 103°47’30,9”E, 2240 m, 18–22 VIII.1998, leg. A. Kun; slide No. RL 7920m (coll. HNHM) .

Paratypes. 2 m, withthesamedataastheholotype; slideNosRL 7921m, RL 7942m (coll. HNHM).

Taxonomy. Theclosestrelativeofthenewspeciesis N. glauculalis (Hampson, 1893), thedetailedcomparisonisgivenintheDiagnosis. Thestructureof antennaeof N. mirabilis issimilartothatofcertaintaxaoccurringinthePhilippines, whiletheshapeandpatternofthewingsarerathersimilartothoseof N. blepharota (Strand, 1920) .

Description. Wingspan 20 mm, lengthofforewing 10 mm. Antennaefiliform, with finecrest- likeventralthickeningsofeachjointprojectedslightlytowardstipofantenna, baseoftheseplateswithtwosetaeoneachsegmentbeingtwicelongerthandiameterof flagellum; ciliaemergefromtheventraledgeofplatesbeing 1.5 timesdiameterofflagellum. Lengthoflabialpalpsnearlythreetimesdiameterofeyes; thirdsegmentshort, its tiplight; secondsegmentquitebroad, dorsalscalesrelativelyshort, basalthirdwithout dorsalscales. Scale-hoodofvertexlong, triangular, broad-based, itstippointed. Protibiae withdensehairs. Characteristicwingpatternfeatures: forewingbroadwithcostanotconcave; groundcolourofforewingbrown; subterminallinecreamywhite, stronglysinuous; postmediallinestronglymarked, verydarkbrown, slightlysinuous; fieldbetweenthetwo transverselineswithdarkerareaclosetodorsum; antemediallinepresent; reniformstigma brightyellow, withoutdarkermarkingsinside, oval- shaped, relativelysmallandcloseto costa; orbicularstigmahardlyvisible. Hindwingslightlypalerthanforewing, transverse linesvisiblenearinneredgeonly; discalspotclearlyvisible, long, narrowandcurved.

Malegenitalia (Fig. 3). Uncuslong, banana- shaped, itstiphooked. Scaphiumaslong asuncus, curvedagainstit. Tegumenaslongasvinculum. Juxtadeltoid-shaped, nearlyas wideaslong. Valvabroad, withparalleledgesinbothsections, basaltwo- thirds (saccular section) catwiceasbroadasapicalthird; cucullusobliquelytruncate. Dorsalhalfofcucullusfusedwiththestronglydevelopedcosta. Sacculuslong, narrowatbase, medialthird twicebroaderthanbasalpartandminutelydentatealongdorsaledge, distalthirdaswide asbasalpart; distalhalfofsacculuscharacteristicallysetose. Harpestronglydeveloped, broad-based, fusedwithsacculusatanarrowsection; erectpartforminglarge, mushroomshapedprocessdirectedtowardsthetipofvalva. Aedeaguslong, slightlycurved, itsedges parallel, carinalprocessabsent; vesica (uneverted) scobinate.

Diagnosis. Theexternalfeaturesandthegenitaliaof N. mirabilis aresimilartothoseof N. glauculalis . However, adarkareaispresentin N. mirabilis closetothesubterminalline, whichisabsentin N. glauculalis . Inthemale genitaliaofthenewspeciesthejuxtaismoreangular, thevalvaisbroader, andtheharpeismuchbigger, mushroom-shaped, beingverydifferentfrom thatof N. glauculalis; inaddition, theaedeagusof N. mirabilis islesscurved.

Thegenitalstructuresof N. mirabilis and N. vicina arestrikinglydifferentforthefirstsight (Figs 3 & 4) butthehomologouspartsarerecognisable, displayingacloserrelationshipbetweenthetwonewspecies.

Etymology. Thebeautifulmalegenitaliainspiredustogivethespecificname.

Distribution. NorthernVietnam (SaPa, LaoCaiprovince).