Ladybug

Definition

A common name for beetles in the family Coccinellidae, used primarily in North America; in British English, 'ladybird' or 'ladybird beetle' is preferred. These small, hemispherical beetles are characterized by a domed dorsum, short legs often concealed beneath the body, and frequently vivid aposematic coloration (commonly red or orange with black spots) that advertises their chemical defenses to predators. Despite the name, they are not true bugs (Hemiptera) but rather polyphagous beetles (Coleoptera) with diverse diets: many species are valued as biocontrol agents of aphids and scale insects, while others feed on mildews, pollen, or, in some cases, are plant pests. The 'lady' etymology refers to the Virgin Mary in European folklore.

Etymology

From 'lady' (the Virgin Mary) + 'bug'; European folklore associated these beetles with the Virgin Mary, who was often depicted in a red cloak. 'Ladybird' is the older British form.

Example

The seven-spot ladybug (Coccinella septempunctata), introduced to North America for biological control, has largely displaced native species such as the nine-spotted ladybug (Coccinella novemnotata) in many agricultural habitats.

Synonyms

• ladybird
• ladybird beetle
• lady beetle

Related Terms

• Coccinellidae
• aposematic coloration
• Biological control
• Coleoptera
• Hemiptera
• domed body
• elytron

Usage Notes

Entomologists prefer 'lady beetle' or 'ladybird beetle' to avoid confusion with true bugs (Hemiptera). The name is regionally variable: 'ladybug' is North American, 'ladybird' is British. Not all ladybugs are beneficial; some species (e.g., Epilachna varivestis, the Mexican bean beetle) are significant agricultural pests. Larval forms are elongate, often dark with colored markings, and frequently overlooked by non-specialists.