Dracontogena rubondoensis Aarvik & Karisch, new species

(Figs. 7, 25, 37)

Type material. Holotype, 3, TANZANIA: Geita District: Rubondo Island, 1140 m., 3.iv.1991, A. Bjørnstad 26805, genitalia slide L. Aarvik 2734 (NHMO). Paratype: 13, same data as holotype, A. Bjørnstad 23665 [abdomen missing] (NHMO).

Description. Adult. Male (Fig. 7). Head: Dark brown. Antenna dark brown, scape light brown. Labial palpus 1.5 times diameter of eye, dark brown. Thorax: Dark grey, light grey in front, with yellowish white posterior dot, tegulae with pale ochreous band medially. Fore and mid-legs dark grey, all tarsi with paler rings, hind leg beige with greyish white scale tuft. Wingspan 17.0–19.0 mm. Forewing blackish brown, four white costal strigulae and two small white dots on termen above middle; dorsal white spots broadly interconnected. Hindwing dark grey; basal scales modified, narrow, black; termen strongly concave before anal corner; fringes along termen from apex to concavity very short.

Male genitalia. (Fig. 37). Valva broad, with very large circular scale patch; phallus rather long, 729 μm., gradually tapering, with ca. 62 small cornuti. Tergite 8 (Fig. 25) short, with small lateral incision.

Female unknown.

Diagnosis. D. rubondoensis n. sp. is externally characterised by the broad white band connecting the two dorsal marks in the forewing. The concavity in the hindwing is less pronounced than in D. continentalis, D. bjornstadi n. sp., and D. angolensis n. sp.

Distribution. Known only from the type locality, Rubondo Island, Lake Victoria, Tanzania.

Biology. The habitat is characterized as level ground 150 m from the beach, with fire-maintained mosaic of grassland and swamp/ground water forest. The UV-trap was situated at a forest edge between Phoenix reclinata Jacq. and Annona senegalensis Pers., two of the most common tree species in this mosaic (A. Bjørnstad pers. comm.).

Etymology. The species is named after the type locality: Rubondo Island, Lake Victoria, Tanzania.