Xenispa Baly 1859

1 Pronotum of the same colour as elytra, legs black or metallic. Small species, length below 4 mm with narrow margin of elytra.................................................................... 2

– Pronotum, head, fore- and mid-legs yellow. Large species, length 6.0– 7.5 mm with broadly explanate margin of elytra (Fig. 18)................................... X. fouquei sp. nov.

2 Lateral margins of pronotum strongly swollen, broad and separated by a deep sulcus from the disc. Dorsum metallically coloured................................................................ 3

– Lateral margins of pronotum narrow and separated by shallow sulcus from the disc. Dorsum pitch-black, pronotum somewhat paler coloured (Fig. 15)............................................................................................................................................ X. atra (Pic, 1926)

3 Pronotum narrower, 1.4–1.5× as wide as long. Swollen lateral margin of pronotum of the same width, narrowing only anteriorly. Elytra black with greenish or antracite metallic tint........... 4

– Pronotum broader, 1.7× as wide as long. Swollen lateral margin of pronotum distinctly narrowed at base and anteriorly. Elytra very dark brown with bluish metallic tint.............................................................................................................................. Xenispa sp. 1

4 Pronotum shiny, microreticulation centrally vanished and more or less visible only laterally. Elytra metallic antracite..................................................... X. carinata (Pic, 1934)

– Pronotum subopaque due to more prominent microreticulation. Elytra very dark olivegreen (Fig. 8)..................................................................... X. aeneipennis (Baly, 1859)