Dolgoma khelanga sp. n.

(Figs 13, 23)

Type material. Holotype (Figs 13, 23): male, “N. Thailand, Lampang Chae Son NP, 1496m, 18°51,080’N, 99°22,016’E 10.V.2008 leg. K. Černý ” / “Slide AV4693 ♂ A. Volynkin ” (MWM / ZSM, ex CKC).

Paratypes: THAILAND: 3 males, same data as for the holotype; 1 male, same locality and collector as for the holotype, 1.VI.2005 (CKC) .

Diagnosis. The forewing length is 11 mm in males. The male of D. khelanga sp. n. (Fig. 13) is superficially similar to that of D. kawila sp. n. (Figs 9, 10), but differs in the somewhat smaller size, the somewhat narrower forewing, the ochreous forewing ground color (rusty-brown in D. kawila sp. n.) and the somewhat more basally positioned postmedial line. The male genital capsule of the new species (Fig. 23) is surprisingly very similar to that of the superficially dissimilar D. striata (Figs 14, 24), but differs in the longer uncus (in proportion to the tegumenvinculum complex length) and the somewhat wider valva (the length to width ratio is 5.3:1 vs. 5: 1 in D. striata) which is somewhat more dilated subapically. Compared to D. kawila sp. n. (Fig. 21), the male genital capsule of D. khelanga sp. n. has a longer uncus (in proportion to the tegumen-vinculum complex length), a somewhat longer vinculum (in proportion to the tegumen length), and a longer (in proportion to the tegumen-vinculum complex length) and somewhat narrower valva (the length to width ratio is 5.3:1 vs. 4: 1 in D. kawila sp. n.) which is less dilated distally. The phallus of the new species is shorter than in D. kawila sp. n. (in proportion to the tegumen-vinculum complex) and is more narrowed distally. The vesica of D. khelanga sp. n. is markedly narrower than in D. kawila sp. n. and its distal diverticulum has a shorter tip. The phallus and vesica of D. striata are unknown (see Fig. 24).

Female unknown.

Distribution. Known from Northern Thailand (Lampang Province).

Etymology. Khelang is the old name of Lampang. The specific epithet refers to the type locality.