sumatrana

Ssp. sumatrana (Hagen, 1894)²⁾[♂] [♀: sumatranus, (Jordan, 1909)⁴⁾]

= sumatranus, (Jordan, 1909)⁴⁾ [♂, ♀] (Sumatra)

(Distribution) [Map 88]

INDONESIA (Sumatra)[Aceh] Takengon (=Takingeun), [N. Sumatra] Bekancan, Mt. Sinabung, Karo Hills, Sibolangit, Bandar Baru, Sikulikap, Berastagi, Prapat (=Parapat), Lake Toba area, [W. Sumatra] Bukittinggi, Lake Singkarak area, Solok, Padang, Mt. Talang, [Jambi] Sungaipenuh, Barisan Range, [S. Sumatra] Mt. Dempo, Palembang, [Lampung].

(Episodes of discovery and original description)

Subspecies discovered and described by Hagen in 1894. In his article, “Verzeichniss der von mir auf Sumatra gefangenen Rhopaloceren” (List of rhopaloceras caught by me on Sumatra), Hagen described it as a variation of Ritsemae, based on a specimen of ♂, which was identified by the absence of two black triangular spots on the upper surface of the abdomen (the sex marks). Note that sumatrana is a reference to its habitat, Sumatra.

(Characteristics)

This subspecies is intermediate between the nominotypical ssp. from Java Is. and ssp. paeninsulae from Malay Peninsula.

(Spotted pattern)

♂: As in the nominotypical ssp., many individuals have black wedge-shaped (=cuneiform) spots within spaces of HW, which are characteristic of this species. However, these black wedged-shaped spots are often obscured or only a few in number, but the black marginal projections are the largest of subspecies. Dorsal surface of abdomen is light brown and is characterized by the absence of black median spot. Reddish hairs on lateral thorax slightly present, but absent or few on neck.

♀: The vein-stripes on FW are intermediate between the most conspicuous nominotypical subspecies and the minute ssp. paeninsulae and its color is grayish-yellowish brown. HW, the dark discal spots are large and fused together to form a band. The pale band is absent in the subcostal space, but uniformly yellow and darker than the nominotypical ssp. A few red hairs on the lateral thorax.