Key to males of Phoenicagrion

1. Hind prothoracic lobe very large, subrectangular (Figs 6, 8, 10) ................................................................................. 2

1`. Hind prothoracic lobe not large, rounded (Figs 1, 3, 5)................................................................................................ 4

2. Hind prothoracic lobe with an acute lobe at its postero-lateral corner (Fig. 6) ............................................ P. paulsoni

2´. Hind prothoracic lobe with no acute lobe at its postero-lateral corner, this area forming an angle (Fig. 8) or rounded (Fig. 10) ........................................................................................................................................................................ 3

3. Postero-lateral corner of hind prothoracic lobe sharply angled, width of base of hind prothoracic lobe narrower than width of median lobe (Fig. 8). Penis with well-defined lateral lobes (Fig. 22). ............................................... P. k a r a j a

3´. Postero-lateral corner of hind prothoracic lobe rounded, width of base of hind prothoracic lobe subequal to the width of median lobe (Fig. 10). Penis without well-defined lateral lobes (Fig. 23) ............................................ P. megalobos

4. Cercus in lateral view with a dilation just anterior to the ventral tooth (Figs 12, 13) Wings flavescent or hyaline..... 5

4´. Cercus in lateral view with no dilation anterior of the ventral tooth (Fig. 14). Wings hyaline ......................... P. i b s e n i

5. Frons rounded, wings flavescent ................................................................................................................ P. flavescens

5´. Frons angled, wings hyaline ...................................................................................................................... P. flammeum