1	Procoxal cavities closed (Fig. 15E, narrowly open in rare cases); color of dorsum and venter anteriorly black, fading to red-brown or yellow-brown posterad; apex of last abdominal ventrite (ventrite V) of female deeply emarginate, with slender blade-like projection at middle (Fig. 15C); from dorsal and ventral views, paramere of aedeagus with preapical lateral expansion triangular, not acute (Fig. 14G)	P.rufiposterus sp. nov.
–	Procoxal cavities open (e.g., Fig. 25A); body color not fading from black to paler posterad; apex of last abdominal ventrite (ventrite V) of female without longitudinal slender blade-like structure; from dorsal and ventral views, paramere of aedeagus with preapical lateral expansion absent, rounded or acute, not triangular	2
2	Body length less than 7.0 mm; scutellar shield with antero-lateral edge evenly convex and posterior apex narrowly rounded; tarsal claw with ventral apex much smaller than dorsal one (Fig. 12A, indicated by arrow); apex of paramere pointed and turned laterad in ventral view (Fig. 12E, I, indicated by arrows)	P.minutus sp. nov.
–	Body length greater than 7.0 mm; scutellar shield with antero-lateral edge sinuate and posterior apex pointed; tarsal claw with ventral apex as large as dorsal one (Figs 4A, 10B, indicated by blue arrow); paramere apex not pointed and bent laterad	3
3	Elytra with metallic luster; pronotum and hypomeron entirely red except posterior edge red-brown or black	4
–	Elytra without metallic luster; pronotum and hypomeron black, brown or with longitudinal midline black and remainder red	5
4	Elytra black, with metallic blue to purple luster; paramere with preapical lateral expansion in ventral view, (Fig. 7E), with sides rounded, facing laterally, without apical mesal callus; prosternal process with outline of ventral apex rounded-rectangular in ventral view (Fig. 25C)	P.florentini (Fleutiaux, 1895)
–	Elytra metallic green; paramere of aedeagus without preapical lateral expansion, with apical mesal callus (Fig. 21D); prosternal process with outline of ventral apex evenly rounded in ventral view (Fig. 25I)	P.zhiweii sp. nov.
5	Dorsum bicolored, with yellow to red maculation; if dorsum unicolor, apex of median lobe of aedeagus dilated in ventral view (Figs 10D, F, 11F)	6
–	Dorsum unicolored, without maculation; in ventral view, apex of median lobe of aedeagus not dilated	8
6	Body dark brown, elytra with longitudinal yellow stripes; ventral surface of prosternal process not strongly narrowed posterad in ventral view, with apex truncate to slightly convex (Fig. 25A, B); paramere without preapical lateral expansion in ventral view	7
–	Body entirely black, yellow or mixed with both yellow and black (Fig. 11A); ventral surface of prosternal process strongly narrowed posterad in ventral view, with apex acute (Fig. 25E); paramere with small and round preapical lateral expansion in ventral view (Fig. 11F)	P.manuleatus (Candèze, 1888)
7	Each elytron with three separate slender longitudinal yellow stripes on interstriae III, V and VII (Fig. 2A); aedeagus gradually narrowed from base to apex in lateral view (Fig. 2H); apex of median lobe narrowly rounded to angulate in ventral view (as in Fig. 2G, I)	P.alterlineatus sp. nov.
–	Each elytron with a single longitudinal yellow stripe covering basal half of interstria IV and interstriae V to VII. (Fig. 4A, C); in lateral view, aedeagus of equal thickness from base to apical fifth, only slightly narrowed at apical fifth (as in Fig. 4N); apex of median lobe truncate to broadly rounded in ventral view	P.flavistriolatus sp. nov.
8	Head with frontal carina convex in frontal view (Fig. 16C). Pronotum with interspaces between punctures 0.3–1 × average puncture diameter (Fig. 16D). Elytral length to pronotal length ratio 2.7–3.1. Paramere of aedeagus with apex needle-like and simple, without preapical lateral expansion (Fig. 16F)	P.unguicularis (Fleutiaux, 1918)
–	Head with frontal carina straight in frontal view. Pronotum with interspaces between punctures 1–3 × average puncture diameter. Elytral length to pronotal length ratio 2.5–2.7. Paramere of aedeagus not needle-like at apex, with preapical lateral expansion	9
9	Posterior angle of pronotum with lateral edge convex, strongly bulged laterally in dorsal view (Fig. 17C, D). Median lobe of aedeagus with apex not dilated or bent dorsad in lateral view (Fig. 17G)	P.yanagiharae (Miwa, 1927)
–	Posterior angle of pronotum with lateral edge straight to slightly convex, not strongly bulged in dorsal view. Median lobe of aedeagus with apex dilated (Fig. 19F) or bent dorsad (Fig. 8G) in lateral view	10
10	Dorsum matt, brown to red-brown. Aedeagus with apex of median lobe bent abruptly dorsad in lateral view (Fig. 8G); in ventral and dorsal views, paramere with a secondary lateral bulge present before preapical lateral expansion (Fig. 8D, E, F, indicated by arrows)	P.magnus Fleutiaux, 1931
–	Dorsum entirely black and shiny. Aedeagus with apex of median lobe not bent dorsad in lateral view (Fig. 19F); in ventral and dorsal views, paramere without a secondary lateral bulge (Fig. 19D, E)	P.yunnanensis sp. nov.