Key to species of Oriental Ulonemia

1. Costal area biseriate at widest part............................................ .. Ulonemia malaccae (Drake, 1942)

- Costal area uniformly uniseriate in its length................................................................2

2. Hood moderately inflated, globular or semi-globular in dorsal view, distinctly produced anteriorly; rostrum reaching to posterior margin of mesosternum, or to middle of metasternum but not to posterior margin of metasternum................... 3

- Hood small, not globular or semi-globular, slightly produced anteriorly, subtruncate; rostrum extending almost to end of sulcus.................................................................................................... 6

3. Hood relatively large, posteriorly reaching near middle of pronotal disc, noticeably higher than median carina (Figs. 10, 14); paranota moderately broad, triseriate opposite calli, biseriate opposite humeri, areolae relatively large (Fig. 14); costal area moderately broad, as wide as subcostal area............................................. U. magna sp. nov. (Fig. 6)

- Hood relatively small, posteriorly produced, scarcely reaching pronotal disc, or posteriorly extending between calli, slightly higher than median carina (Figs. 11–13); paranota narrow, biseriate opposite calli, uniseriate opposite humeri, areolae relatively small; costal area relatively narrow, and narrower than subcostal area.......................................4

4. Hemelytra relatively narrow, nearly as wide as pronotum (Fig. 5); hood rather small, semi-globular in dorsal view, four to five areolae long, posteriorly extending between calli (Figs. 9, 13); rostrum reaching to posterior margin of mesosternum (Fig. 17); most areolae of costal area lengthwise subquadrate...................................... U. angusta sp. nov. (Fig. 5)

- Hemelytra relatively broad, wider than pronotum (Figs. 1–3); hood relatively large, globular in dorsal view, six to seven areolae long, posteriorly produced, scarcely reaching pronotal disc (Figs. 11, 12); rostrum distinctly extending beyond to posterior margin of mesosternum (Figs. 15, 16); areolae of costal area widthwise subquadrate................................ 5

5. Lateral carinae not parallel at pronotal posterior process and anteriorly converging (Fig. 7); inferior margins of bucculae nearly straight (Fig. 11); female paratergite VIII distinctly produced backwards towards lateral margin of paratergite IX (Fig. 19)...................................................................... U. assamensis (Distant, 1903a) (Figs. 1, 2)

- Lateral carinae nearly parallel at pronotal posterior process (Fig. 8); inferior margins of bucculae broadly arched (Fig. 12); female paratergite VIII not produced backwards towards lateral margin of paratergite IX (Fig. 20)....................................................................................................... U. jingae sp. nov. (Fig. 3)

6. Paranota mostly biseriate, uniseriate opposite humeri; body relatively broad, length/width: 3.05/1.0.............................................................................................. U. dignata (Drake and Poor, 1937)

- Paranota biseriate in front, extremely narrow and not areolate opposite humeri; body relatively narrow, length/width: 3.45/1.0.......................................................................... U. electa (Drake and Poor, 1937)