Hippodamia

Chevrolat in Dejean, 1836

Oblong Lady Beetles, Lady Beetles, Ladybugs

Hippodamia is a of () containing several economically important . The most common North species is H. convergens, which forms numbering in the millions and is widely used in . Another notable species, H. variegata, has a distribution across both hemispheres. Members of this genus are primarily valued in agriculture for pest management.

Hippodamia variegata by (c) Name, some rights reserved (CC BY), uploaded by Name. Used under a CC-BY license.

Hippodamia apicalis by (c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon. Used under a CC-BY license.

Pronunciation

How to pronounce Hippodamia: /ˌhɪpoʊˈdeɪmiə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Oblong body shape distinguishes Hippodamia from more rounded . identification relies on pattern and number of spots on , extent of markings on the , and precise arrangement of convergent facial markings (particularly prominent in H. convergens). H. convergens shows 12 black spots on orange-red elytra with distinctive white convergent on the . H. variegata typically displays a more variable spot pattern with 13-20 spots.

Images

Habitat

H. convergens occurs in grasslands, forests, agricultural fields, gardens, and natural parks. H. undecimnotata forms at sites featuring prominent visual landmarks with low risk, despite unfavorable abiotic conditions for survival. H. variegata occupies diverse across its wide geographic range.

Distribution

H. convergens: throughout North America. H. variegata: , occurring widely across both Northern and Southern Hemispheres. H. undecimnotata: distribution not fully detailed in available sources.

Seasonality

H. convergens migrates from mountains toward the coast in early spring and reverses direction in fall. form in late season. H. undecimnotata exhibits aggregations with post-aggregation and reproductive behaviors following the diapause period.

Diet

constitute the primary . H. convergens also consumes , , and other soft-bodied ; feeds on pollen and nectar when prey is scarce. H. variegata is with documented cannibalistic . Specific prey for H. undecimnotata not detailed in available sources.

Life Cycle

to development duration varies by and . H. convergens: 22.5-34.1 days depending on prey species (longest on , shortest on ). Larval stages are . H. undecimnotata: adults undergo in before .

Behavior

H. convergens forms mass ; wild-collected from these aggregations for commercial distribution. H. undecimnotata exhibits aggregations functioning as hidden for mate-finding, with numerous matings occurring at aggregation sites. These matings are energetically inexpensive for females, conserving energy for post-aggregation behaviors. H. variegata displays cannibalistic .

Ecological Role

Important and other soft-bodied in agricultural and natural . H. convergens serves as a agent for , , and , reducing reliance on chemical . H. undecimnotata contributes to through mate-finding .

Human Relevance

H. convergens is one of the few wild-collected from mass for commercial distribution to the pest control industry. Widely used in programs. Occasionally bites humans, apparently to collect salt rather than defensively. sometimes mistaken for pests and killed by gardeners.

Similar Taxa

CoccinellaBoth are , but Coccinella typically have rounder body shapes and different spot patterns (e.g., C. septempunctata with seven spots).
HarmoniaHarmonia axyridis (multicolored Asian ) is also used for and overlaps in use, but exhibits more variable coloration and pattern, and has become in some regions where Hippodamia are .
CyclonedaC. sanguinea (spotless ) lacks spots entirely, distinguishing it from spotted Hippodamia ; also differs in pronotal markings.

Misconceptions

of Hippodamia are frequently mistaken for pests due to their alligator-like appearance and killed by novice gardeners, despite being voracious . The massive radar-detected 'bloom' near San Diego in June 2019 was attributed to H. convergens by some sources, though questioned this identification due to late season timing and cold temperatures potentially unsuitable for .