Chaetodera Jeannel. Characters 1946

1. Femora iridescent coppery, rarely coppery with green sheen..................................................... 2

— Femora metallic bluish-black or violet-black, rarely entirely black........................................... 4

2(1). Elytra almost entirely yellow, with an oblique black mark at base and numerous round black punctures on disc; Somalia............................................... C. blanchardi (Fairmaire 1882)

— Elytra ivory-white with black or brownish-black fasciae (bands), lacking numerous black punctures on disc; Madagascar................................................................................................................. 3

3(2). Dark elytral markings extending to lateral margin at one and usually two points, forming large oblique bands or stripes............................................................ C. perrieri (Fairmaire 1897)

— Dark elytral markings not extending to lateral margin, often reduced to a network of narrow lines on disc.............................................................................. C. antatsima (Alluaud 1902)

4(1). Yellow elytral markings narrow, strongly oblique (angled).......................................................................................................................................... C. maheva (Künckel d’Herculais 1887)

— Yellow elytral markings broader and more transverse (running more directly across the width of the elytra), especially on apical half (the half closest to the tip).............................................. 5

5(4). Dark elytral markings usually iridescent blue; yellow stripe along suture of elytra very short, not extending more than 1/3 the length of the elytra starting from the base; sub-Saharan Africa........................................................................................................... C. regalis (Dejean 1831)

— Dark elytral markings usually black; yellow stripe along suture of elytra much longer, extending more than 1/3 the length of the elytra starting at the base; Madagascar.................................................................................................................................... C. andriana (Alluaud 1900)