Lanka

Prathapan, K. D. & Viraktamath, C. A., 2008, The flea beetle genus Lanka (Coleoptera: Chrysomelidae) in India with descriptions of three new species and notes on the identity of the pollu beetle infesting black pepper, Piper nigrum, Zootaxa 1681 (1), pp. 1-30 : 20

Key to the species of Lanka of the Indian subcontinent

1 Head and pronotum black; in ventral view, aedeagus greatly broadened distally ........ L. brunnea (Maulik)

- Head and pronotum yellow, brown or red; in ventral view, aedeagus narrowed distally...........................2

2 Head, pronotum and elytron bright red; antennomeres 3–10 entirely piceous; antenna not passing beyond 1/3 of elytron over pronotum; length 3.2–3.6mm; spermathecal duct with bends, not coiled; vaginal palpus transversely wrinkled in proximal 1/3 .................................................................. L. aruna New species

- Dorsum entirely light brown with black elytral suture or head and pronotum yellow and elytra black; antennomeres 3–10 entirely light brown or yellow; antenna reaching middle of elytra or beyond over pronotum; length 2.2–2.8mm; spermathecal duct coiled; vaginal palpus not transversely wrinkled in proximal 1/3........................................................................................................................................................3

3 Head and pronotum yellow, elytron black; receptacle of spermatheca with parallel sides in proximal 2/3 near pump, narrowed in distal 1/3 towards duct; elytral rows of punctures regular and countable in proximal half .......................................................................................................... L. ramakrishnai New species

- Dorsum entirely light brown with black elytral suture; receptacle of spermatheca with parallel sides in proximal 1/3 near pump, narrowed like a funnel in distal 2/3 towards duct; elytral rows irregular, uncountable ................................................................................................................. L. sahyadriensis New species