Bug FAQLarge Foliage Ground Beetle
Lebia grandis · Order: Coleoptera · Family: Carabidae
The Large Foliage Ground Beetle is about a centimetre long and is the biggest species of its genus in North America. They overwinter in soil near potato fields and hatch after about two weeks, with the first larvae seeking beetle pupae.
Source: Wikipedia
How to recognize it
Its elytra are wide but shorter than the abdomen, which sticks out at the rear.
Source: Wikipedia
Size
At about one centimetre long, it is the largest Lebia species found in North America.
Source: Wikipedia
How to get rid of it
Natural populations rarely reach numbers high enough to fully control Colorado potato beetles. Augmenting fields by releasing adults is considered, but mass-rearing the beetles remains difficult.
Source: Wikipedia
Where it lives
It is a ground beetle of the family Carabidae that lives in North America.
Source: Wikipedia
What it eats
Adults specialize in hunting Colorado potato beetle eggs and larvae, while their own larvae are obligate parasitoids of the beetle’s pupae.
Source: Wikipedia
Life cycle
Adults spend the winter in soil near potato fields.
Source: Wikipedia
When you see it
Adults overwinter in soil close to potato crops. In spring, Colorado potato beetles emerge from hibernation, providing prey for the beetles.
Source: Wikipedia
Where it comes from
The species occurs throughout North America.
Source: Wikipedia
Lookalikes
A related beetle, Leptinotarsa haldemani, occurs in Texas and nearby states but generally does not share the same range except possibly in Texas.
Source: Wikipedia
Where it is found in the US
Recorded in 35 of 51 states and DC. Most records: Texas, Pennsylvania, Kansas, Ohio, Oklahoma, Kentucky, Arizona, Alabama.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How does the Large Foliage Ground Beetle help control Colorado potato beetles?
Adults eat many beetle eggs and larvae each day, and their larvae parasitize beetle pupae.
Source: Wikipedia
Do I need to release more beetles to protect my potato crop?
Because natural numbers are often too low for complete control, growers sometimes consider releasing adults, though rearing them in large numbers is still a challenge.
Source: Wikipedia
When are these beetles active in the field?
Adults emerge from winter soil in spring as Colorado potato beetles become active, providing fresh prey.
Source: Wikipedia
Same family (Carabidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Lebia_grandis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.