Steelblue Lady Beetle







Halmus chalybeus


This lady beetle is dome- shaped, looking a bit like a helmet. When viewed from above it is almost a complete circle. They are dark metallic blue with the wing casings flaring out at the bottom. When feeding on scales being protected by ants, the lady beetles are able to withdraw their legs and antennae underneath their bodies and lower themselves so that the wing covers are flush with the surface. The hard wing covers protect them from the ants. The males tend to be more of a metallic green colour. They also have a pale yellow spot each side behind the eyes (on the pronotum). Larvae are yellow (may be bright or pale) and brown with spiky tufts sticking out in rows along their body. The pupae are black, brown and white, with spikes over the surface.

Adult size: 4 mm

Out and about

They will be around all the year but especially numerous in spring when the weather is warmer and their food is plentiful. They tend to shelter if conditions are too warm or too cold. I found my lady beetle in mid- autumn. These lady beetles are native to eastern Australia.

Reproduction and Life cycle

Their lifespan is from several months to 1 year, living longer in warmer regions.

To deter

To control

Plants to repel

Plants to attract


Why they are Beneficial
The adults and larvae feed on citrus pests such as black scale, aphids, scale, small insects, citrus whitefly and mites. This lady beetle lifts the scale covering and eats the scale underneath. They have been introduced to other countries for biological control of citrus pests.