Dichomeris fascialobella Park & Li, sp. nov.

urn:lsid:zoobank.org:act: 4CDCC1F5-E7C9-4D0B-B500-60F5A18E46C1

(Figs 4, 35)

Type material. Holotype ♂, VIETNAM: Bac Kan Prov.: Ba Be Nat. Park, 26–28 vii 2006, leg. Park, Chae & Cuong, gen. slide no. CIS-6323, in NIBR.

Description. Adult (Fig. 4). Wingspan 13.0 mm. Head dark brown dorsally, with grayish yellow erect scales laterally above compound eyes; frons grayish brown. Ocellus absent. Antenna with scape dark brown on dorsal surface, grayish white on ventral surface; flagellum alternately dark brown and yellowish brown on dorsal surface, yellowish brown on ventral surface, ciliate. Second segment of labial palpus clothed with rough scales, brown on outer surface, yellowish white on inner surface; 3rd segment shorter than second, also clothed with rough scales brownish in basal 2/3, yellowish in distal 1/3. Thorax and tegula dark brown; mesothoracic anepisternum with yellowish-white hair pencils in male. Fore- and midleg pale yellow on inner surface; femora grayish yellow, tibiae and tarsi brown on outer surface; hind tibia pale yellow. Forewing ground color yellowish white, scattered with brown scales; a small dark-brown patch beyond 5/6 of costa; a longitudinal dark-brown stripe running from near 1/3 length of cell to termen and a slightly oblique, black fascia well-developed along fold; costa slightly arched near basal 1/3 and oblique beyond basal 5/6; apex triangularly protrudced; termen concave beyond apex; black line along termen; fringe yellowish brown. Hind wing broader than forewing, brownish gray; fringe concolorous with ground color.

Male genitalia (Fig. 35): Uncus subquadrate, bluntly rounded on posterior margin, concave in arch on anterior margin. Gnathos stout, curved at basal 2/5, acute at apex; culcitula semiovate, with dense spines. Valva as long as the length of tegumen plus uncus, narrow in basal 3/5, broader distally, with rounded apex; valvella short, about 1/5 the length of valva, with rounded apex, bearing long setae apically. Vinculum banded, longer than tegumen plus uncus, sparsely setose at basal 1/4; lateral lobes absent. Saccal region broad, slightly concave at middle anteriorly. Sicae paired lobes, long, symmetrical, fused for short distance at base, then separated in U-shape, reaching anterior margin of uncus, with rounded apex. Aedeagus extremely stout, subtriangular basally, with three sclerotized, nearly same sized processes arising from zone: left one with rounded apex, internal process gradually narrowed to apex, slightly bent downward, and right one slender, sharply pointed apically; with an additional median process arising from ventral surface, ovate, about 1/3 length of internal lobe.

Female unknown.

Distribution. Vietnam (Bac Kan).

Diagnosis. The new species is similar to Dichomeris moriutii Ponomarenko & Ueda, 2004 in the male genitalia, but it can be distinguished from the latter by the third segment of the labial palpus clothed with rough scales and the male genitalia with sicae reaching anterior margin of the uncus. In D. moriutii, the third segment of the labial palpus is smoothly clothed and the sicae exceeds posterior margin of the uncus.

Etymology. The specific name is derived from the Latin, -fascia (= banded) and lobatus (= lobe) with a Latin dimunitive suffix, -ella, referring to the banded siace in the male genitalia.