Metachrostis miasma ( Hampson, 1891 )

Sohn, Jae-Cheon, 2022, New records of five species of Lepidoptera (Cosmopterigidae, Tortricidae, Pyralidae and Erebidae) from sand-dunes along the western coastline of Korea, Journal of Species Research 11 (1), pp. 61-66 : 65

Metachrostis miasma ( Hampson, 1891)

나AEṞệ날fflḇḆ나ḏ ( Figs. 1E , 2E, 2F)

Erastria miasma Hampson, 1891: 12 , 73. Type locality: India, Tamil Nadu, Nilgiris .

Metachrostis miasma ; Hampson, 1894: 325; Kononenko et Matov, 2009: 13.

Eublemma miasma ; Hampson, 1910: 101; Yoshimoto, 1999: 28.

Leptosia miasma ; Warren in Seitz, 1911: 260.

Trilophonota tegulata Wileman et West, 1929: 14 . Type locality: Philippines, Luzon , Klondyke.

Description ( Fig. 1E ). Head with vertex and frons dark brownish gray, speckled with pale brownish gray; labial palpus brownish gray, speckled with pale brownish gray, tinged with dark purplish brown on terminal 1/3, brownish white mesally; antenna 1/2 as long as forewing, purplish brown. Thorax with tegula and mesonotum dark purplish brown. Forewing length 7.3 mm, triangular, broadly round tornally pale purplish gray; subbasal area irrorated with dark brown; antemedian line dark brown, narrow, sinuous; median line dark brown, broadened posteriorly; postmedian line dark brown, with narrow branch at costal 1/3; subterminal and terminal line black, narrow, undulate; cilia pale purplish gray, speckled with dark brown. Hindwing grayish brown; tornal area mottled with dark brown; subterminal line present only on posterior 1/4, black; terminal line black, narrow, undulate; cilia pale purplish gray, speckled with dark brown. Male genitalia ( Fig. 2E, F) with uncus elongate, curved, with hooked tip; tegumen triangular; gnathos as a pair of lobes; valva elongate, broadened in basal half, protruding dorsad at apex, setose; costa curved, with bulge at basal 1/3; clasper as subtriangular, setose bulge; sacculus broadly round; vinculum subtriangular. Phallus slightly broadened in distal half, curved at middle, with spinulate cornutal zone 1/3 as long as phallus.

Material examined. 1♂, Jeollanam-do, Sinan-gun, Is. Jaeundo, Jaeun-myeon, Gojang-ri , Oegi sand-dunes (N34° 53 ʹ 44.5 ʺ, E126°00 ʹ 27.4 ʺ), 16 July 2017 (JC Sohn), [ GSN] SJC-1255, NIBR .

Distribution. Korea (new record), Japan, China, Philippines, Indonesia, New Caledonia, Papua New Guinea (St. Matthias Isl.), Australia.

Host plants. Unknown.

Remarks. This species differs from another congener, M. sinevi Matov et Kononenko, 2009 , known from Korea ( Sohn and Cho, 2014), in having the darker ground coloration, a narrower valva with a bulge on costa, and a narrower coecum. Given the collecting records from various countries, the habitats of this species seem to be not restricted to the coastal sand-dunes.

Figures

Fig. 1. Adult habitus. A. Cosmopterix flavidella Kuroko, 2011, male. B. Noduliferola abstrusa Kuznetzov, 1973, female. C. Maliarpha borealis Sasaki, 2012, male. D. Ectoblemma rosella Sugi, 1982, female. E. Metachrostis miasma (Hampson, 1891), male. Scale bars=4 mm.