Ch. thysi Capronn. male above black with intensive blue reflection; both wings beyond the middle with a common dark bluetransverseband, on the hindwing 6 mm. in breadth, on the forewing somewhat narrower and broken up into spots; hindwing with white submarginal dots and bluish marginal streaks. This remarkably beautiful but very rare speciesdiffers from all other African forms in its bright silvery under surface, which is divided beyond the middle by a red-brown, black-spotted transverse band 2—-3 mm. in breadth. The female is unknown. Congo.