Neochauliodes

Key to adults of Neochauliodes from India and adjacent regions in South Asia

1. Posterior second and third veins of Rs strongly curved posteriad (Fig. 7) ................................. N. truncatus Kimmins

- All branches of Rs without distinct curve (Figs 1–6) ................................................................................................... 2

2. Wings dark with several small hyaline spots (Fig. 4); female eighth sternum with posterior margin acutely produced (Fig. 24). ............................................................................................................................... N. obscurus van der Weele

- Wings hyaline with dark markings; female eighth sternum with roundly convex posterior margin............................ 3

3. Forewings and hindwings with broad dark transverse markings (Fig. 6) .......................... N. subfasciatus (Westwood)

- Wings without broad transverse markings.................................................................................................................... 4

4. Male ninth tergum broadened ventrally, forming sinuate posterior margin in lateral view (Figs 15, 20); lateral arms of male tenth sternum fused with median plate without protrusion (Figs 14, 19); female ninth gonocoxite much shorter than tenth tergum (Figs 16, 21)......................................................................................................................... 5

- Male ninth tergum narrowed and produced posteroventrad (Figs 8, 25, 30, 35); lateral arms of male tenth sternum connected with median plate by narrow protrusions (Figs 9, 26, 31, 36); female tenth tergum subequal in length to ninth gonocoxite............................................................................................................................................................ 6

5. Forewings with markings on proximal half of costal areas punctuate and clearly isolated from each other (Fig. 3); male tenth tergum with distomedial surface round (Fig. 18)....................................................... N. nepalensis sp. nov.

- Forewings with markings on proximal half of costal areas subquadrate and almost contiguous with neighbouring cellules (Fig. 2); male tenth tergum with distomedial surface angulate (Fig. 13) ............... N. indicus (van der Weele)

6. Forewing length 28–34 mm in male and 38–40 mm in female; male tenth sternum with median plate slightly broadened medially and laterally with a pair of elevated ridges in ventral view (Fig. 9) ...................... N. fletcheri Kimmins

- Forewing length 27 mm in male and 29–33 mm in female; male tenth sternum with median plate gradually narrowed apically and laterally without distinct ridges in ventral view (Fig. 26) .......................................... N. simplex (Walker)