Dracontogena agassizi Aarvik & Karisch, new species

(Figs. 6, 24, 35, 36, 60, 61)

Type material. Holotype, 3, KENYA: Western, Kesogon 6500 ft. D.J.L. Agassiz, genitalia slide T. Karisch 2235 (DA, to be deposited in BMNH). Paratype: 1Ƥ, same data as holotype, genitalia slide T. Karisch 1923 (DA). UGANDA: 1Ƥ, Bwamba Toro, Sept. 1961, N. Mitton, genitalia slide USNM 137,547 (USNM).

Description. Adult. Male (Fig. 6). Head: Blackish. Antenna dark brown, scape light brown. Labial palpus 2 times diameter of eye, dark brown, third segment short, drooping. Thorax: Collar blackish brown, thorax brown with broad white transversal band before middle and a white posterior scale tuft. Fore and mid-legs dark grey, tarsi and tibia with weak paler rings, hind leg greyish beige, with scale tuft. Wingspan 18.0–19.0 mm. Forewing blackish brown, strongly suffused with brown in tornal area; costal strigulae as white and brown dots, distinct; two white triangular maculae on dorsum, broadly interconnected, outer maculae with 1–3 small dark dots on dorsum. Hindwing brownish grey, termen only slightly concave, no modified scales present.

Female. Head: As in male. Thorax: Wingspan 23.0–26.0 mm. Transverse band at thorax narrower; white triangular maculae at dorsum hardly interconnected.

Male genitalia (Figs. 35, 36). Valva slender, convexity of ventral edge very slight, valva internally with rather small circular scale patch; phallus (Fig. 36) long, gradually tapered, slightly bent after middle, with 20+ small cornuti. Tergite 8 (Fig. 24) short and broad, with lateral incision.

Female genitalia (Figs. 60, 61). Sternite 7 with broad V-shaped excavation, sterigma oval, sclerotised posteriorly; the paired oval sclerites posterior of sterigma distinct, fused.

Diagnosis. This is the only species in which the male combines an unmodified hindwing with modifications of the genitalia. The male genitalia resemble those of D. continentalis but differ by the shape of the 8th tergite. In the female genitalia the fused paired sclerites posterior of the sterigma are characteristic. The sterigma is more oblong than that of D. continentalis . The ductus bursae is as broad as the ostium bursae, and the ductus seminalis arises at one third to one fourth the length of the ductus bursae (at about half in D. continentalis).

Distribution. Kenya and Uganda.

Etymology. The species is named after David Agassiz who collected the type material of this species and several of the other species included in the present work.

Remarks. Razowski & Trematerra (2010) recorded D. niphadonta Diakonoff from Ethiopia, Bale Mountains, Harenna Forest. Their illustration of the single male shows a species with unmodified hindwing, and so it is conspecific with neither D. continentalis nor D. niphadonta . The male genitalia with slender valva and long phallus resemble those of D. continentalis, but the circular scale patch in the valva is very small. The specimen from Ethiopia probably is conspecific with D. agassizi n. sp.