Key to known species of Petalops

1 Antennal segments I–III black with or without basal joint of segments II–III pale yellow; antennal segment IV black with subbasal pale yellow ring or pale yellow with apical third black ( thoracicus group)................................... 2

- Antennal segments I–IV castaneous orange or pale yellowish orange ( distinguendus group).......................... 9

2 Antennal segment IV pale yellow with apical third black; hind femora yellow with two black rings, one near midline, the second at apex; anterior lobe of pronotal disk with yellow transverse band which spreads along anterolateral margins (Fig. 8)...................................................................................... P. thoracicus (Thunberg)

- Antennal segment IV black with subbasal yellow ring........................................................ 3

3 Hind femora bicolored................................................................................. 4

- Hind femora unicolored................................................................................ 5

4 Hind femora with anterior half black, and posterior half yellowish orange; head dorsally pale yellow with antenniferous tubercles black; head ventrally, thorax, abdominal sterna and genital plates entirely pale yellow (Fig. 4)...................................................................................................... P. bellator Brailovsky

- Hind femora with anterior half yellowish orange and posterior half black; head dorsally almost entirely black; head ventrally, thorax, abdominal sterna and genital plates almost black to reddish brown; pleural margin of abdominal sterna III–VII yellow with anterior third black (Fig. 3)....................................................... P. azureus (Burmeister)

5 Pronotal calli yellow to castaneous orange................................................................. 6

- Pronotal calli black with bluish green reflections............................................................ 7

6 Abdominal sterna III–VII orange to yellowish orange; dorsal abdominal segments III–IV and basal half of V black and apical half of V and VI–VII shiny orange (Fig. 12)................................................. P. fortunatus Dallas

- Abdominal sterna III–VI reddish brown to black with upper pleural margins yellow; dorsal abdominal segments III–VII black with scars of segments IV–V and V–VI yellow (Fig. 11).................................... P. distinctus Montandon

7 Abdominal sterna III–VII black to reddish brown with pleural margins yellow; dorsal abdominal segments III–VII black with scars of segments IV–V and V–VI yellow (Figs. 1, 16)..................................... P. napoensis Brailovsky

- Abdominal sterna III–VII pale yellow to pale yellowish orange; dorsal abdominal segments III–IV and basal half of V black and apical half of V and VI–VII shiny orange (posterior margin of VII black)..................................... 8

8 Thorax reddish orange with bluish green reflections; connexival segments III–VII pale yellowish orange; anterior and posterior lobes of metathoracic peritreme black (Fig. 9)............................................. P. ambiguus Brailovsky

- Thorax pale yellow with shiny dark brown longitudinal stripe running on outer face of sternum and covering pro-, meso-, and meta-acetabulae; connexival segments III–VII black with narrow vertical yellow stripe parallel to anterior margins of sternites; anterior and posterior lobes of metathoracic peritreme pale yellow (Fig. 13)......................... P. graziae sp. nov.

9 Hind femora bicolored or tricolored..................................................................... 10

- Hind femora unicolored.............................................................................. 13

10 Hind femora tricolored with basal half pale yellowish orange, posterior half shiny orange with distal joint and wide ring near midline back; head dorsally entirely pale castaneous orange (Fig. 5)................................ P. lautus sp. nov.

- Hind femora bicolored; head dorsally black with the space between eyes and ocelli and longitudinal stripe between ocelli pale to dark orange to yellowish orange...................................................................... 11

11 Hind femora with anterior half black and posterior half shiny orange with apex black (Fig. 7)....... P. occulta Brailovsky

- Hind femora with anterior half yellow and posterior half black............................................... 12

12 Pronotum pale castaneous orange with bluish green reflections (Figs. 2, 10)................... P. distinguendus Breddin

- Pronotum brown with bluish green reflections and disk with yellow transverse band which spreads anteriorly along anterolateral margins (Fig. 6)................................................................... P. necopinus sp. nov.

13 Pronotal disk castaneous orange with bluish green reflections and wide transverse yellow or orange band running below calli (Fig. 15)..................................................................... P. luteomaculosus Brailovsky

- Pronotal disk pale orange or castaneous orange or reddish brown with bluish green reflections and without yellow or orange transverse band...................................................................................... 14

14 Dorsal abdominal segments III–VI pale orange, VII black with middle third of anterior margin pale orange and VIII–IX black; head dorsally pale orange; meta-acetabulae pale orange (Fig. 14)................................. P. jactatus sp. nov.

- Dorsal abdominal segments III–IX black with pale yellow median longitudinal stripe running from III to middle third of segment VII; head dorsally black with the space between eye and ocelli and short longitudinal stripe between ocelli pale yellow; meta-acetabulae black to dark castaneous with bluish green reflections......................................... 15

15 Pronotal disk reddish brown to black with bluish green reflections; hind femora shiny black to reddish brown or with dorsal face shiny black and ventral face shiny reddish brown (Fig. 18)........................................ P. virago Breddin

- Pronotal disk orange to dark castaneous orange with posterior margin dark with bluish green reflections; hind femora shiny castaneous orange (Fig. 17)............................................................ P. proletarius Breddin