Naarda atrata sp. n.

(Figs 5, 16, 31, 34)

Holotype. m, Thailand: Prov. ChiangMai, 500 m, MaeSuai, CharinGardenResort, 99°35’E, 19°47’N, 2.XI.2002, leg. B. Herczig & G. Ronkay; slide No. TB 392m (coll. HNHM).

Paratypes. Thailand: 1 m, 1 f, dataasholotype, slideNoTB 666m (coll. HNHM); 1 f, Prov. ChiangMai, 450 m, MokFaGardenResort, 98°48’E, 19°06’N, 1.XI.2002. leg. B. HerczigetG. Ronkay; slideNo. TB448f (coll. HNHM); 1 f, Prov. ChiangMai, betweenChiang Dao and Kariang , 900 m, 99°48’E, 19°25’N, 26.X.2002, leg. B. Herczig & G. Ronkay; slide No. TB665f (coll. HNHM) .

Taxonomy. Theverydarkgroundcolourofwingsisanunusualcharacterinthegenus.

Description. Wingspan 11–13 mm, lengthofforewing 5–7 mm; oneofthesmaller speciesofthegenus. Antennaefiliform, ciliatewithsetaeinbothsexes, inmalewithdense ciliation, lengthofcilia 1.5 timesdiameterofflagellum, lengthofsetaetwicelongerthan thatofflagellum. Infemalesetaeaslongasdiameterofflagellum, ciliahalftimesaslong asdiameter, ciliationsparse. Labialpalpssimilarinbothsexes, withlengththreetimes diameterofeye, tiny 3rdsegment, relativelybroad 2ndsegmentandconvexdorsaledge ofscales. Scale-hoodofvertexnarrow-based, relativelylong, itstiprounded. Profemoraof malewide. Characteristicwingpatternfeatures: costainmalesminutelyconcave; ground colourdarkgrey; subterminallinemouse-grey, quitenarrow, stronglysinuous; postmediallineblackish, parallelwithsubterminalline, inmaleangledstronglyinwardsbelow cell; reniformstigmaochreous, elongate, oval – orflask- shaped, withpalegreylineinits axisandwithblackdotatbottomthird; orbicularstigmasmallbutclearlyvisible, ochreous withblackishedge. Hindwingdifferentlycolouredinthetwosexes: infemalepalerthan forewing, withbroadinnermostfasciaandwithoutdiscalspot; inmalegroundcolourlike forewing, discalspotpresent, hardlyvisible, areabetweendiscalspotandpostmedialline slightlypalerthangroundcolour.

Malegenitalia (Fig. 5). Uncusrelativelylong, straight, itstiprounded. Scaphium shorterthanuncus, straight. Tegumenlongerthanvinculum. Saccusnarrow-based, long, itstiprounded. Juxtamushroom-shaped, nearlytwicewiderthanlong. Valvanarrowbased, edgesofbasalthirdparallel, distalpartstronglytapering; costa, cucullusandharpe fusedproducingintosclerotisedandacutelypointedstructure; costalprocessabsent. Sacculusshortandnarrow, itstiprounded, endinginthebasalhalfofvalva. Aedeagus straight, long, evenlynarrow, carinalprocessabsent; vesica (semi-everted) denselyscobinate, armedbyverylongandslender, subbasallycurvedcornutushavingsomewhatribbon-likebasalsectionandstraight, pointedspine.

Femalegenitalia (Fig. 16). Ovipositorlobeswide, angular. Apophysesshort; rateof apophysesanteriores: apophysesposteriores = 2,5: 3. SternumA7 veryshort, sinusabsent. Ductusbursaerelativelylong, narrow, membraneous, withlarge, globularcolliculum closetoostium. Corpusbursaedividedintotwoparts, posteriorpartsmooth, aslongas butslightlybroaderthanductusbursae, anteriorpartlarge, oval, threetimeslongerthan posteriorpart, denselyscobinatebytinygrains.

Diagnosis. Naardaatrata isverysimilarinexternalappearanceto N. furcatella sp. n., butthelabialpalpsoftheformerspeciesareconspicuouslyshorter.

Themalegenitaliaofthisnewspeciesdifferfromthoseof N. glauculalis bytheshorteruncusandscaphium, muchlongersaccus, narrowersacculus, broaderandlessabruptlytaperingvalva, lesscurvedandthickeraedeagus andthepresenceofanarrowcornutus.

Thefemalegenitaliaof N. atrata arereminiscentof N. notata (Hampson, 1891) (Fig. 22), buttheductusbursaeisnarrowerandthecolliculumismuch shorter, butbroader.

Etymology. Thespecificnamereferstothedarkgroundcolourofwings.

Distribution. Thailand, themountainousareasofChiangMaiinthenorthwestern partofthecountry.