Key to the species of Megauchenia of India

1. Body elongate, subparallel (Figs. 21–22); lateral margin of pronotum almost straight; intervals between elytral striae narrower than the striae, apices of elytra sinuate and not uniformly outlined..................................... M. quadricollis

- Body elongate-ovoid (Figs. 19–20, 29–30); lateral margin of pronotum arcuate; intervals between elytral striae wider than the striae; apices of elytra gently arcuate and margin uniformly rounded.............................................. 2

2. Elytral punctures arranged in regular rows........................................................ M. angustata

- Elytral punctures arranged not entirely in regular rows, striations partially erased and punctation confused in areas .. M. indica