Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. IV. Genus Tagoria Yakovlev & Zolotuhin, gen. nov.

In the fourth part of the revision on the Asian Metarbelidae we describe the new genus Tagoria Yakovlev & Zolotuhin, gen. nov. (type species, by original designation: Arbela watsoni Hampson, 1900). The male and female of Tagoria watsoni (Hampson, 1900) comb. nov. are redescribed, the new species Tagoria dierli Yakovlev & Zolotuhin, sp. nov. (type locality: Nepal, Rapti Tal, Monahari Khola, Belwa) is described.


Introduction
Metarbelidae (Lepidoptera, Cossoidea) of the Oriental region were studied very insufficiently. Lehmann (2019) described two new genera from Nepal and Sumatra. In the same time, Zolotuhin † (2020, 2021) prepared a detailed revision of the Asian representatives of the family basing on the study of all the available materials.
Arbela watsoni Hampson, 1900 was described on a series of syntypes from "Madras".Having examined the morphological details of this little studied species, we came to the conclusion that A. watsoni represents a genus new to science, the description of which is given below. Additionally, we found one more male of a non-described species from Nepal, also belonging to this species.

Material and methods
The materials for the study were the adult Metarbelidae specimens deposited in various collections: NHMUK -National Museum of Natural History (formerly: The Natural History Museum, London, U.K.); ZSM -Zoologische Staatssammlung der Bayerischen Staaten (Munich, Germany).
The male and female genitalia were mounted in euparal on slides following Lafontain and Mikkola (1987) and examined with an Olympus SZX16 microscope. The images were taken with the digital camera CMOS 20.7 megapixels and processed using Corel Photo-Paint 2017 software.

Description.
Male. Moths of small size, color dark. Antenna bipectinate, setae in medium third of antenna three times longer than antenna rod diameter. Fore wing short. Small transverse white spot discally (in cubital area), wide dark band postdiscally. Hind wing grey, without pattern.
Female. Slightly bigger than male. Antenna bipectinate, setae in medium third of antenna twice longer than antenna rod diameter. Wing pattern resembles that of male, but significantly lighter.

Diagnosis.
The new genus clearly differs from all the Asian representatives of the family in the following characters: -the short, wide fore wing with a small light portion in discal area (cubitally), -the tiny phallus, -the very wide ostium and strongly sclerotized funnel-shaped antrum; -the extended scabination zones on the bursa.

Redescription.
Male. Length of fore wing 12−13 mm. Fore wing light-brown, with small brown strokes along costal edge; brown portion basally (at base of cubital veins); light creamy strokes more distally, wide brown band in discal area with two bright brown spots at top of discal cell and in cubital zone; poorly expressed brown pattern of strokes postdiscally, submarginally and marginally; thin brown band submarginally. Fringe on fore wing mottled, creamy between veins, brown at veins. Hind wing light-brown with poorly developed pattern of brown strokes; marginal area creamy without pattern. Fringe on hind wing creamy, unicolorous. Male genitalia. Uncus thin, long, apically slightly extended, with wide semicircular bifurcation, uncus halves thick, diverging to sides; subscaphium dorsally strongly extended, abdominal half narrow, funnel-shaped; gnathos arms short, lamellar; gnathos lamellar, with long thin lateral processes; costal edge of valve practically smooth, outer edge semicircular, saccular edge curved, strongly sclerotized, with small harpe, saccus tiny, juxta lamellar, semicircular; phallus very small, slightly curved on border between basal and medium thirds, equal to 1/3 of valve in length, coecum very extended, vesica aperture in dorso-apical position, about 1/2 of phallus in length, vesica without cornuti.
Female. Length of fore wing 14.5 mm. Wing slightly more extended than that of male. Wing pattern resembles that of male but significantly lighter, all dark elements reduced.
Female genitalia. See the genus description.

Description.
Male. Length of fore wing 12 mm. Fore wing brown, with dim dark-brown portions at root and postdiscally, small light portion discally (in cubital area), border creamy, fringe brown. Hind wing brown, without pattern, border creamy, fringe brown.
Female unknown.

Diagnosis.
T. dierli differs from T. watsoni in the darker pattern, poorly expressed postdiscal band, narrow valve and long subscaphium.
Etymology. The species is named after the well-known German entomologist Wolfgang Dierl (1935Dierl ( −1996, specialist in Psychidae, explorer of the entomofauna of Nepal, one of the collectors of the new species.