Traiguma nasuta Distant

Figs 4A–D, 7G–J, 10D–E, 12J, 25A–I, 26A–I

Diagnosis. Crown narrowed in front of eyes and then expanded triangularly, without median ridge dorsally. Male abdominal tergites III–V with median broad yellow patches (Fig. 12J). Male pygofer lobes about 1.6× as long as their greatest width in lateral view. Male style with apex of apophysis sclerotized and hooked. Aedeagus with basal angular projection on ventral surface of shaft (Figs 25I, 26I).

Material examined. INDIA: Tamil Nadu: LECTOTYE ♀, “Nilgiri, Hampson”, “ Traiguma nasuta Dist. Type ” “Distant Coll. 1911-383” (BMNH) . INDIA: Tamil Nadu: 1♁, Naduvattam, 1829m, 6.vi.1977, C.A. Viraktamath (UASB) .

Remarks. One male specimen from Thai Sola (Nilgiri Hills) slightly differs from the male specimen illustrated by Viraktamath & Webb (1991) in having the anterior projection of head more depressed and rounded (in the typical specimen it is triangular and flat), male pygofer lobes more expanded near the base and with slightly sinuate posterior margins (in T. nasuta not convexly rounded at base and the posterior margin almost straight), the connective comparatively much wider distally and the aedeagus much more widely rounded with the ventral process more basal compared to the male specimen illustrated by Viraktamath & Webb (991). However, these differences are treated here as intraspecific variations.

Viraktamath & Webb adequately described and illustrated this species. T. nasuta has the male style similar to that of T. verticalis . These two species have the base of aedeagal shaft with one or more processes; in the former the process is unpaired and at the base on the ventral surface medially and in the latter the processes are paired and on the dorsal surface. However, the species drastically differ in the shape of the crown. The third species, T nielsoni has the male crown with the anterior process upturned at a right angle and the aedeagus lacks the basal process or processes (see below).