Bug FAQMicrorhopala rubrolineata
Microrhopala rubrolineata · Order: Coleoptera · Family: Chrysomelidae
Adult Microrhopala rubrolineata are tiny beetles about 3.7-5.3 mm long. These beetles favor plants with composite flowers such as goldenrods and daisies, and they are found in the southwestern United States and parts of Mexico.
Source: Wikipedia
How to recognize it
Adults are black with a metallic blue or purple shine and may have orange markings on the pronotum or elytra.
Source: Wikipedia
Size
They grow to a length of roughly 3.7-5.3 mm as adults.
Source: Wikipedia
Where it lives
They prefer plants that have composite flowers, especially goldenrods and daisy-sunflower types.
Source: Wikipedia
What it eats
Like other Microrhopala species, they feed on plants with composite flowers, especially goldenrods and daisies.
Source: Wikipedia
Where it comes from
Microrhopala rubrolineata occurs in the United States, specifically Arizona, California, New Mexico, and Texas. It is also recorded from Mexican states such as Baja California, Sonora, and Durango.
Source: Wikipedia
Where it is found in the US
Recorded in 7 of 51 states and DC. Most records: California, Arizona, Oregon, Texas, Washington, Nevada, New Mexico.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How big are Microrhopala rubrolineata?
Adults measure about 3.7 to 5.3 mm in length.
Source: Wikipedia
What plants do they like?
They prefer plants with composite flowers, especially goldenrods and daisies.
Source: Wikipedia
Same family (Chrysomelidae)
Spotted Cucumber BeetleDiabrotica undecimpunctataDamages trees, gardens or crops
Bean WeevilAcanthoscelides obtectusDamages trees, gardens or crops
Cowpea WeevilCallosobruchus maculatusDamages trees, gardens or crops
Swamp Milkweed Leaf BeetleLabidomera clivicollisDamages trees, gardens or crops
Alder Leaf BeetleAgelastica alniDamages trees, gardens or crops
Dogbane Leaf BeetleChrysochus auratusSources
- Wikipedia: https://en.wikipedia.org/wiki/Microrhopala_rubrolineata
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-26 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-26.