Key to females of Phoenicagrion
1. Hind prothoracic lobe with latero-basal tufts of hairs on well-developed lateral lobes (Figs 9, 11)............................ 2
1´. Hind prothoracic lobe with no tufts of hairs and no lateral lobes (Figs. 2, 4, 7). ......................................................... 3
2. Hind prothoracic lobe with differentiated hind border chitinized, lateral lobes well-developed (Fig. 9) ........ P. k a r a j a
2´. Hind prothoracic lobe with differentiated hind border not chitinized, lateral lobes poorly developed (Fig. 11). .......... ................................................................................................................................................................... P. megalobos
3. Hind prothoracic lobe subrectangular (Fig. 7).............................................................................................. P.paulsoni
3´. Hind prothoracic lobe rounded (Fig. 2) ........................................................................................................................ 4
4. Wings hyaline ............................................................................................................................................. P.flammeum
4´. Wings flavescent ......................................................................................................................................... P. flavescens