Rypobius praetermissus
Taxonomy
- Polyphaga
- Cucujoidea
- Corylophidae
- Rypobius
- Rypobius praetermissus
Length: 2.4-2.6mm. Basic colour: black. Pattern: none, or thin reddish margin at rear. Number of spots: 0. Pronotum: black, with reddish anterior margins in male. Head colour: reddish (male), black (female). Leg colour: brown (male), black with brown tibiae (female). Other features: hairy.
Habitats: dunes, dry grassland and heathland. Host plants: low-growing vegetation, moss. Food: aphids. Overwintering sites: low herbage and leaf litter.
Length: 3 - 4mm. Background colour: russet. Pattern colour: black spots. Number of spots: 0-24 (20). Spot fusions: common. Melanic (black) forms: rare. Pronotum: russet with black spots. Leg colour: russet. Other features: elytra covered in fine hairs (visible with hand lens), giving the ladybird a matt appearance.
Fourth-instar larva: cream-yellow or greenish in colour; short and stubby in shape; tubercles dark, bearing thick yellow spiny bristles with extensive side-branching. Pupa: pale yellow with small black spots, partially covered by shed larval skin at base.
Habitats: The 24-spot ladybird is very much a grassland species and its habitat is often described as ‘rough grass’; however records have also been received from marshy habitats and scrub.
Host plants: This species is most commonly found on grasses but also on other low growing plants such as thistle, nettle, mugwort, salad burnet, knapweed, spurrey and tansy.
Food: red campion, false oat-grass.
Overwintering sites: 24-spot ladybirds overwinter in low herbage, grass tussocks and gorse bushes.