Meleonoma Meyrick, 1914

Meleonoma Meyrick, 1914: 255 .

Type species: Cryptolechia stomota, Meyrick, 1910 . TL. India. TD. NHMUK.

Acryptolechia Lvovsky, 2010: 255 .

Type species: Cryptolechia malacobyrsa Meyrick, 1921 . TL: Japan. TD: NHMUK.

Generic characters. Head (Figs 3 a−h): Vertex with scales spreading from lateral margin toward middle; labial palpus three segmented, upturned, third segment shorter than second segment, acute at apex; antenna filiform, shorter than forewing, scape slightly elongate and widened, without pecten.

Thorax (Figs 6 a−h). Forewing from narrow to broad lanceolate, with long oblique termen; hindwing lanceolate or elongate sub-oval. Venations (Fig. 4): Forewing with R 4 and R 5 stalked, R 5 to apex, M 3, CuA 1 and CuA 2 separated; hindwing with Rs, M 1 and M 2 subparallel, M 3 and CuA 1 stalked from lower angle of cell.

Abdomen (Figs 5 a−h): Tergites with strong spines, arranged in different shape.

Male genitalia (Figs 7 a−h): Uncus varied in length and shape, smooth or densely setose. Gnathos absent or present; if present, being a circle (in some species with a ventral plate), or either separated, or indistinct ventrally. Valva varied in shape, usually widened medially, or widened from base to apex; transtilla developed or absent; sacculus free from valva entirely or distally, seldom not separated from valva. Phallus often with sclerites or clustered spines.

Female genitalia (Figs 8 a−h): Papillae anales broad. Lamella postvaginalis and lamella antevaginalis present or absent. Antrum present or absent. Ductus bursae membranous, partly or entirely sclerotized. Corpus bursae with or without granules; signum present or absent.

Diagnosis. The genus Meleonoma Meyrick, 1914 is close to the genus Phaulolechia Diakonoff, 1951 . Meleonoma can be distinguished by the forewing with termen not concave below apex, R 5 extended to costa, and CuA 1 and CuA 2 separated; in Phaulolechia, the termen of the broad forewing is concave below apex, R 5 is extended to termen, and CuA 1 and CuA 2 initiate from the same point (Diakonoff 1951: 89).

Distribution. The genus Meleonoma is distributed mostly in the Palearctic and the Oriental regions.

Key to species groups of Meleonoma Meyrick, 1914

1. Forewing with a transverse fascia........................................................................ 2

- Forewing without a transverse fascia...................................................................... 4

2. Forewing ground color dark, with a yellow median fascia..................................................... 3

- Forewing ground color yellow, with a dark postmedian fascia.................................... malacobyrsa group

3. Valva without an apical spine................................................................ fasciptera group

- Valva with an apical spine........................................................... dentivalvata group (part)

4. Forewing ground color yellow, with a dark costal spot and a distal patch................................ facialis group

- Forewing ground color dark, with yellow markings, or without markings......................................... 5

5. Forewing without markings.............................................................. jigongshanica group

- Forewing with yellow markings.......................................................................... 6

6. Gnathos present...................................................................................... 7

- Gnathos absent....................................................................................... 8

7. Forewing with two small costal and one small dorsal spots; uncus furcate apically................... annulignatha group

- Forewing with two lager costal and one large dorsal spots or with more irregular spots; uncus not furcate apically............................................................................................... segregnatha group

8. Forewing with two large costal spots or with a median fascia and a costal spot; uncus short and strong, densely setose...................................................................................... dentivalvata group (part)

- Forewing usually with two small costal spots; uncus long and slender, with a few setae................. acutiuscula group