Cathyalia Ragonot 1888

Cathyalia pallicostella Roesler & Küppers, 1981 new record to China (Figs 5–6, 9, 12)

Cathyalia pallicostella Roesler & Küppers, 1981: 17; Roesler, 1983: 80.

Adult (Figs 5–6). Wingspan 14.0–17.0 mm. Vertex and frons yellowish brown. Antenna with scape yellowish brown, flagellum yellowish brown and blackish brown. Labial palpus with basal segment yellowish white, terminal two segments pale yellowish brown on inner side, blackish brown on outer side, second segment about 2.2 times length of third segment. Maxillary palpus yellowish brown tinged with black. Tegula, patagium and thorax grayish brown. Forewing grayish mixed with blackish brown; a broad grayish white streak from basal 1/5 to apex along costa, about 1/4 width of forewing, scattered grayish brown scales; antemedial line and discal spots absent; postmedial line obscure, grayish white, placed on dstal 1/6, slightly oblique inward; terminal line blackish brown; cilia grayish brown. Hindwing gray; cilia grayish brown. Legs yellowish white, scattered blackish brown scales, tarsus blackish brown, with gray ring at end of each segment. Abdomen yellowish brown ventrally, grayish brown dorsally, yellowish white along longitudinal middle line of each segment.

Male genitalia (Fig. 9). Uncus bullet-shaped, length twice as long as width, apex narrowly rounded. Apical process of gnathos slender, clubbed, pointed at apex, about 3/4 length of uncus. Transtilla a narrow arched band. Valva narrowed at base, gently broadened to rounded apex, densely setose in apical 1/3; costa arched, strongly sclerotized on inner margin, narrowed at base, whereas slightly broadened from middle to apex; clasper spoon-shaped, from basal 1/4 near costa stretched toward apex of sacculus, rounded-triangularly expanded distally; sacculus 3/5 length of valva, spindle-shaped, rounded at end, densely setose. Vinculum elongate, twice as long as wide, tapered rounded anteriorly. Lateral lobes of juxta clubbed, distally setose. Aedeagus slender, slightly arched, about 1.3 times length of valva; cornuti consisted of a cluster of needlelike thorns at apex and a slender, sinuate sclerite, which about 4/5 length of aedeagus. Culcita included a bunch of long hairs.

Female genitalia (Fig. 12). Ostium situated at intersegmental membrane between seventh and eighth segments, slightly narrower than antrum. Antrum rectangular, width 1.5 times as long as length, rounded at angles. Ductus bursae moderate in width, anterior 1/5 membranous, posterior 4/5 sclerotized. Corpus bursae elongate, oval, about same length of ductus bursae, with a large, oval patch consisting of minute thorns posterolaterally. Signa comprised of more than 10 small nail-like conical spines, located at sclerotized rounded plates, obliquely arranged in posterior 2/5 of corpus bursae.

Material examined. Hainan, 6♂ 10♀ (NKUM), 2♂ 4♀ (HAASM); Yunnan, 2♂ 1♀ (NKUM); Hong Kong, 1♀ (NKUM).

Distribution. China (Hainan, Hong Kong, Yunnan), Indonesia.