Key to the species of Strattis

1. Antennae with article 1 of funicle longer than article 2 of funicle (Fig. 90)........................................2

- Antennae with article 1 of funicle shorter than or as long as article 2 of funicle (Figs 50, 101)......................... 3

2. Elytra with strial punctures shallow; with small, well defined, dusty white spot medially in each stria. Pronotum distinctly convex above. Body size small 3–4 mm ........................................................ S. biguttatus Pascoe

- Elytra with strial punctures deep, without any median white spot, instead with greenish brown scales basally on striae 1 to 3 and interstriae 2 to 4 (Figs 7, 21). Pronotum feebly convex above (Fig. 9). Body size large 4–7 mm ....................................................................................................... S. srilankaiensis sp. nov.

3. Pronotum with whitish scales, variegated with two pairs of blackish spots, one apical, another median, and with distinct patches basally (Figs 1, 13). Elytra with dusty greyish scales beyond middle, and variegated with whitish scales apically (Fig. 1). Ventrites 3 to 5 with blackish scales, except laterally on each side (Fig. 19). Body size 3–6 mm ...... S. pascoei sp. nov.

- Pronotum without any whitish scales and blackish spots (Fig. 14). Elytra without any dusty greyish and whitish scales as above (Figs 4, 20). Body size 5–6 mm .......................................................................... 4

4. Elytra with indistinct, obsolete, dirty white patches, assuming a band like form towards the posterior part or the entire apical third more or less whitish................................................................. S. vestigialis Pascoe

- Elytra with X-shaped markings of whitish scales over the dusty greyish scales, and two triangular patches of blackish scales medially (Figs 4, 20)................................................................... S. maculatus sp. nov.