Key to the Asiatic Calleida species groups

1. Abdominal sternum VII with two or more setae on each side in males (figs. 2–3), three or more setae in females (figs. 5–6). 2

- Abdominal sternum VII with one seta on each side in males (fig. 1), two setae in females (fig. 4)...................... 3

2. Pronotum coarsely punctate (fig. 24). Male with abdominal sternum VII not notched (fig. 3); endophallus of aedeagus without chitinized copulatory pieces (fig. 27).............................................. 2. C. puncticollis species group

- Pronotum very finely punctate or impunctate. Male with notched abdominal sternum VII (fig. 2); endophallus of aedeagus with one or a pair of copulatory pieces............................................. 3. C. discoidalis species group

3. Anterior angles of pronotum without setae (fig. 14)........................................................... 4

- Anterior angles of pronotum each with some, erect setae (figs. 11–13)............................................ 8

4. Outer apical angle of elytra acute, forming sharp tooth (fig. 15). Median lobe of aedeagus in lateral aspect with a distinct, very prominent ventral lobe (figs. 45, 51); abdominal sternum VII deeply notched in males........ 5. C. terminata species group

- Outer apical angle of elytra square or obtusely rounded, not forming tooth (figs. 16–18). Median lobe of aedeagus without prominent ventral lobe; abdominal sternum VII shallowly notched in males....................................... 5

5. Pronotal disc and all parts of legs piceous to black (figs. 67–69), sometimes fourth and fifth tarsomeres dark brown (fig. 78). Species larger sized (L: 11.5–15mm). Median lobe of aedeagus markedly concaved ventrally, without ventral ridges or lobes................................................................................. 7. C. doriae species group

- Pronotal disc and legs usually reddish yellow to brown, if legs partly dark, at least all tarsomeres reddish brown (fig. 62). Species smaller sized (L: 5.5–11.5 mm). Median lobe of aedeagus simple or strongly ridged ventrally......................6

6. Elytral apex strongly curved, outer apical angle markedly widened (fig. 16). Median lobe of aedeagus with apical lamina elongate, widened and ax-shaped (fig. 64).............................................. 6. C. borneensis species group

- Elytral apex straight or weakly curved, outer apical angle not or slightly widened (figs. 17–18). Median lobe of aedeagus with apical lamina short and simple........................................................................... 7

7. Body size generally greater than 9.5mm; elytra with an indistinct bluish purple patch on disc; metacoxae with few accessory fine setae. Median lobe of aedeagus peculiar in form, irregularly explanate and ridged ventrally...............................................................................................8. C. chloroptera species group (pars)

- Body size generally smaller than 9.5mm; elytra completely metallic greenish, or disc with reddish patch; metacoxae only with 3 or 4 primary setae. Median lobe of aedeagus simple................................. 9. C. splendidula species group

8. Dorsal surface densely and evenly pubescent (figs. 36–38). Elytra with wide reddish patch on disc............................................................................................... 4. C. lativittis species group (pars)

- Dorsal surface glabrous, or with scarce pubescence restricted to some body parts. Elytra fully metallic or with reddish patch. 9

9. Antennomeres 1–3 with numerous fine setae in addition to the primary ones (fig. 7); pronotal lateral margin setose through full length (fig. 11). Endophallus with a long and bent chitinized flagellum (fig. 21)............1. C. gressittiana species group

- Antennomeres 1–3 with only the primary apical setae (fig. 9); pronotum lateral margin with fine setae restricted to the anterior angles (fig. 13). Endophallus with a pair of copulatory pieces not modified as long flagellum......................... 10

10. Only anterior angles of pronotum setose, elytral humeral margins without setae. Elytra very elongate, EL/EW 1.80–2.05. Median lobe of aedeagus simple, without ventral ridges or lobes (figs. 32, 34)........... 4. C. lativittis species group (pars)

- Both anterior angles of pronotum and elytral humeral margins setose (fig. 10). Elytra shorter, EL/EW 1.65–1.75. Median lobe of aedeagus peculiar in form, irregularly explanate and ridged ventrally..............8. C. chloroptera species group (pars)