Naarda cingulata, Tóth, Balázs & Ronkay, László, 2015

Tóth, Balázs & Ronkay, László, 2015, Revision of the Palaearctic and Oriental species of the genus Naarda Walker, 1866 (Lepidoptera: Erebidae, Hypeninae). Part 5. Description of 13 new species from Asia, Zootaxa 3925 (2), pp. 179-201 : 180

Naarda cingulata sp. n.

male: fig. 26, female: fig. 27

Type material. Holotype. ♂: Thailand, Tham Sakoen National Park, headquarters; 19°23’N, 100°38’E; 29–30.XI.2003, leg. Á. Kőrösi & L. Peregovits, slide No. TB 645m (coll. HNHM).

Paratype. ♀: Thailand N., 50 km NW Mae Hong-Son, by Shan, 800 m, 14.VII.2003, leg. M. Fibiger, slide No. TB664f (coll. MF).

Diagnosis. The male genitalia of this new species are similar to those of N. bipunctata Tóth & Ronkay, 2014b ( Thailand) , with the following differences: the uncus and the saccular terminal extension of the new species are more slender, the costa is shorter, the costal process is much smaller and the carinal process of aedeagus is rougher than in N. bipunctata . In female genitalia the sinus of N. cingulata is much broader than that of the former taxon, the lamella antevaginalis, which is present in N. bipunctata , is absent in the new species, the corpus bursae is smaller and has a broad spinulose band in comparison with the entirely smooth corpus bursae of N. bipunctata . Another closely related species is N. fuscicosta ( Hampson, 1891) which also belongs to this lineage despite its completely different external appearance: the new species is smaller and the wings are much darker coloured than in N. fuscicosta , and the male antenna has no rami. The male genitalia of N. cingulata have more slender uncus and cucullus and somewhat broader saccular process than those of N. fuscicosta moreover the costa of the new species has a tiny process and the carina of aedeagus bears a dentate process which are absent from the latter species. The female genitalia of the two species differ by the more sclerotised ductus bursae and larger corpus bursae with much more conspicuous spinulose band of the new species.

Description. Wingspan 12–13 mm, length of forewing 6–6.5 mm. Male antennae lacking, female antennae filiform with setae as long as the diameter of flagellum and cilia ¾ times as long as the diameter. Labial palps of male worn, four times longer than the diameter of eye, female palps slightly shorter, their length 3.5 times the diameter of eye, dorsal edge of 2nd joint convex, rounded, tip of palp not light. Scale-hoods of both specimens worn, supposedly triangular. Characteristic wing pattern features: forewing costa not concave in male; sexes similar; ground colour dark grey; subterminal line grey, sinuous; postmedial line black, slightly sinuous, bent inwards below cell; medial and antemedial lines conspicuous only below cell; reniform stigma bright yellow, situated relatively close to costa, ovoid, with tiny indentation at its outer margin and with greyish spot in bottom half; orbicular stigma small, coloured like reniform stigma; hindwing slightly lighter than forewing but with ground colour of its basal area darker, i.e. like that of forewing. Male genitalia (fig. 1). Uncus long, narrow and curved, its tip with tiny, hook-like structure. Scaphium straight, as long as uncus. Tegumen longer than vinculum; saccus broad-based, with average length, gradually tapering to its rounded tip. Juxta large, flat, rounded-rhomboid. Valva narrow, gradually tapering; cucullus with average width, its tip rounded; costa straight, narrow, apically with minute, pointed projection touching almost apex of cucullus. Sacculus narrow, with relatively long, apically slightly curved and truncate terminal extension. Aedeagus thick, straight, carina with broad but short, dentate, strongly sclerotised process. Vesica (not fully everted) scobinate by small grains. Female genitalia (fig. 15). Ovipositor lobes angular. Apophyses anteriores broader and shorter than apophyses anteriores. Sternum A7 narrow, divided to two separate triangular lobes. Sinus very broad, slightly tapering towards ostium. Ductus bursae broad, slightly tapering anteriorly, its posterior ¾ covered by broad colliculum. Corpus bursae relatively small, ovoid, its mid-third having broad band composed of relatively big, slender and curved spines; rest of bursa smoothly membranous.

Distribution. Thailand.

Etymology. “ Cingulata ” means “banded”, after the conspicuous spinulose band of the corpus bursae.

Taxonomic remarks. The small size and the broad, not concave forewing costa is an unusual combination of characters within this lineage.