Key to species of Traiguma Distant

(modified from Viraktamath & Webb 1991)

1. Crown narrowed in front of eyes and then expanded triangularly, without median ridge dorsally (Figs 4A, 7G, I); aedeagal shaft with basal angular projection on ventral surface (Figs 25I, 26I)..................................... T. nasuta Distant

- Crown narrowed in front of eyes, of uniform width or narrowed beyond, with prominent median ridge dorsally (Figs 8A, C, E, G); aedeagal shaft without basal angular projection on ventral surface but with or without dorsal pair of short processes (Figs 27F, 28G)........................................................................................... 2

2. Male with crown apex abruptly turned dorsally almost at right angle (Figs 8A, B); male abdominal tergite IV without median yellow patches (Fig. 12K); aedeagal shaft without basal processes (Fig. 27F); female crown with three pairs of tubercles anteriorly (Fig. 8D)........................................................... T. nielsoni Viraktamath & Webb

- Male with crown only gradually curved dorsally (Figs 8E, G)); male abdominal tergite IV and V with median yellow patches (Fig. 12L); aedeagal shaft with basal pair of lamellate processes (Fig. 28G); female crown without tubercles anteriorly (Fig. 8H)................................................................................. T. verticalis Distant