Delphastus pusillus is a small ladybird beetle which preys on all species and stages of whitefly, but prefers eggs and nymphs. The adults are small ( 1⁄16 in), shiny, black beetles. Newly emerged adults are pale-brown to almost white. They eventually turn black with a brown head. The eggs are 0.2 mm long, clear and twice as long as they are wide. The elongate larvae are pale yellow.