Microlithosia umbripuncta (de Joannis, 1928 )

Bayarsaikhan, Ulziijargal, Lee, Dong-June & Bae, Yang-Seop, 2018, Genus Microlithosia (Lepidoptera, Erebidae, Arctiinae) in Laos, with the description of a new species, Zootaxa 4420 (4), pp. 502-508 : 505

Microlithosia umbripuncta (de Joannis, 1928)

( Figs. 2 , 5 )

Eilema umbripunctata de Joannis, 1928 , Ann. Soc. Ent. Fr. 97: 25[255]–256, pl. I, fig. 1. TL: North Vietnam (Chocay [ Tonkin]).

Microlithosia umbripuncta: Dubatolov, Kishida & Wang, 2012 , Tinea 22(1): 39.

Redescription. Adult ( Fig. 2 ). Length of forewing 8–9 mm in male. Head and thorax yellowish. Ground color of forewing golden yellowish, costal margin slightly convex medially, with a diffuse dark discal spot, a diffuse dark patch on costal margin, and diffuse dark claviform spots present or absent; cilia yellowish. Hindwing pure yellowish; cilia pale yellowish. Abdomen pale yellowish.

Male genitalia ( Fig. 5 ). Uncus slender, hook-shaped, with small spine at top, almost same length with tegumen; cucullus shark dorsal fin-shaped, apex angled; distal saccular process stout, asymmetric, right one with two symmetric divaricates processes, and left one with three (two apically, another one basally) short, asymmetric divaricates processes; basal saccular process stout, finger-shaped, bears stout setea whole of length, with an apical spine, left one twice longer than right; juxta semicircular; aedeagus short, stout, a long process originated from the middle part of aedeagus; vesica without cornuti.

Female unknown.

Material examined. Laos. 1 ♂, Prov. Bolikhamsai, Tad Xai Waterfall (N18˚27′05.98″, E103˚08′40.06″, Alt. 321m), 8.XI.2015 (Y.S. Bae, B.S. Park, S.M. Na, J.W. Kim and D.J. Lee), Gen. Slide No. INU ˗ 1816L; 2 ♂, Prov. Bolikhamsai, Phou Khao Khouay NP. (N18˚27′10.99″, E103˚03′41.06″, Alt. 451 m), 4.VIII.2016 (Y.S. Bae, B.S. Park, S.M. Na, J.W. Kim, D.J. Lee and J.H. Ko), Gen. Slide No. INU ˗ 1828L, 1826L; 3 ♂, ditto (N18˚27′18.20″, E103˚03′17.60″, Alt. 465 m), 5.VIII.2016 (Y.S. Bae, B.S. Park, S.M. Na, J.W. Kim, D.J. Lee and J.H. Ko), Gen. Slide No. INU ˗ 1829L, 1830L, 1831L; 1 ♂, Prov. Vientiane, Phou Khao Khouay NP. (N18˚21′12.70″, E102˚45′21.50″, Alt. 750 m), 10.VIII.2016 (Y.S. Bae, B.S. Park, S.M. Na, J.W. Kim, D.J. Lee and J.H. Ko), Gen. Slide No. INU ˗ 1827L; 1 ♂, Prov. Bolikhamsai, Phou Khao Khouay NP. (N18˚29′43.79″, E103˚00′48.02″, Alt. 561 m), 28.VI.2017 (Y.S. Bae, S.M. Na, J.W. Kim, D.J. Lee, J.H. Ko and T.K. Lee), Gen Slide No. INU ˗ 1844L; 3 ♂, ditto (N18˚27′11.9″, E103˚03′40.5″, Alt. 452 m), Gen. Slide No. INU ˗1849L, 1850L, 1851L.

Distribution. Laos (new record), North Vietnam, Cambodia, Thailand.

Figures

FIGURES 1–3. Adults of genus Microlithosia spp. form Laos. 1. M. laosana sp. n., holotype, male, Laos. 2. M. umbripuncta, male, Laos. 3. M. nanlingica, male, Laos.

FIGURES 4–6. Male genitalia of genus Microlithosia spp. from Laos. 4. M. laosana sp. n., Laos (INU˗1846L, holotype). 5. M. umbripuncta, Laos (INU˗1827L). 6. M. nanlingica, Laos (INU˗1819L).