Ischnopoderona madecassa (Cameron, 1944a), comb. n.

(Figs. 69–71, Map 6)

Tachyusa madecassa Cameron, 1944a: 319. Ischnopoda egregia Pace, 1999a: 79, syn. n. Ischnopoda madecassa: Pace, 1999: 77.

Type material. Tachyusa madecassa Cameron. Lectotype (here designated): ɗ: Madagascar, Antananarivo, Sikora, T. madecassa Cam. Type (BMNH). Paralectotypes: ɗ, Ψ: same data as lectotype (BMNH).

Ischnopoda egregia Pace. Holotype: ɗ: N Madagascar, Ambodivoangy, XI.1969, J. V. (MNHN).

Taxonomic notes. An examination of the types listed above, particularly the genitalia, revealed that they are all conspecific. Therefore, Ischnopoda egregia Pace is here synonymised with Tachyusa madecassa Cameron, the oldest name available.

Additional material. Madagascar: Perinet, 12.X.1970, ex banks of stream, 17 exx (BMNH), 2 exx (ISEA); Berenty Reserve near Amboasary, River Mandrare, on mud, 19.X.1970, 7 exx (BMNH), 1 ex (ISEA); Tananarive, on mud by lake, 6–13.X.1970, 10 exx (BMNH), 1 ex (ISEA); Anjiro, beside stream, 21.X.1970, 1 ex (BMNH); Moramanga, 1000–1200 m, 31.I–2.II.1993, J. Janak, 1 ex (BMNH), 1 ex (ISEA); Antananarivo, Sikora, 1 ex (FMNH).

Redescription. Body. Length 2.6–3.0 mm, convex, parallel­sided, glossy; body colour dark brown; tergites VI–VII black, antennae brown with antennomeres 1–3 red, legs red.

Head circular in outline, convex; eyes large, strongly protruding from lateral contours of head, length of each seen from above longer than postocular region; surface of head without microsculpture; puncturation minute, pinprick­like and moderately dense. Antennae moderately long, extending to base of pronotum, slightly increasing in width apically, antennomeres 2 and 3 subequal in length, antennomeres 4–8 longer than wide, antennomeres 9–10 as long as wide, antennomere 11 nearly coniform.

Pronotum quadrate, convex, lateral sides sinuately narrowed to obtuse hind angles; before base with relatively large transverse impression; surface without microsculpture; puncturation fine and moderately dense; pubescence at midline directed posteriorly in apical half and anteriorly in basal half.

Elytra subquadrate, at suture as long as pronotal length at midline; surface without microsculpture; puncturation minute, pinprick­like and moderately sparse.

Abdomen widened posteriorly, bases of tergites III–V each with deep transverse impression, first two impressions coarsely punctate, third impression smooth, impunctate; tergal puncturation minute, pinprick­like and sparse; surface without microsculpture.

Male. Aedeagus as in Figs. 69–70.

Female. Spermatheca as in Fig. 71.

Remarks. See remarks under I. nigerrima.

Distribution. Madagascar (Map 6).