Key to species of Ptilomymar of the world (based on features from the original
descriptions and illustrations).
(Note: females are not known for orientalis; males are not known for dictyon and rete)
1 ♀: flagellum clavate, funicle 8-segmented and clava 1-segmented.................. 2
− ♂: flagellum filiform, 11-segmented............................................................6
2 Scape distinctly enlarged ventrally in apical half (Fig. 1)..............................3
− Scape not distinctly enlarged ventrally in apical half....................................4
3 Pedicel about 1.6× as long as fl1; fl1 distinctly longer than wide (Fig. 1); fore
wing about 3.6× as long as wide, with a triangular dark brown marking behind
marginal vein (Fig. 4); metanotum about 0.25× as long as scutellum.....
.........................................................................................P. dianensis sp. n.
− Pedicel about 5.0× as long as fl1; fl1 as long as or at most slightly longer than
wide; fore wing about 5.4× as long as wide, without a broad dark band behind
marginal vein; metanotum slightly less than 0.5× as long as scutellum...
.............................................................................................. P. magnificum