Key to male Protosticta species of Northeast India

1. Paraproct simple—not lobed, without basal and median spines (Fig. 8e–f), pterothorax unmarked................ P. fraseri

Paraproct lobed, with a basal spine, pterothorax with markings................................................. 2

2. Inwardly pointed spine on paraproct (Fig. 8g)............................................................... 3

No inwardly pointed spine on paraproct................................................................... 4

3. Inwardly pointed spine on paraproct long and perpendicular to the paraproct; inwardly directed sharp spine on cerci mid-way (Fig. 8g –h), S8–9 dorsally blue................................................................ P. himalaiaca

Inwardly pointed spine on paraproct shorter and oblique to the paraproct; small tubercle on mid-way of cerci (Fig.8i–j), S8–9 dorsally brown.............................................................................. P. samtsensis

4. Apex of paraproct with two arms of almost equal length; cerci rectangular at apices (Fig. 8b–d)................. P. khasia

Apex of paraproct with lower lobe longer and sharply pointed; cerci notched, bi-lobed at apices (Fig. 8a)...... P. damacornu