Bug FAQGrapevine Hoplia
Hoplia callipyge · Order: Coleoptera · Family: Scarabaeidae
Adult grapevine hoplia are small, oval beetles about 6 to 10 mm long and 3 to 5 mm wide, brown in color. They are active from March through May and are found in the western United States, British Columbia, and Baja California.
Source: Wikipedia
Size
Adults measure roughly 5.8 to 10.5 mm in length and 3.4 to 5 mm in width.
Source: Wikipedia
Where it lives
They occur in the western United States, British Columbia, and Baja California.
Source: Wikipedia
Life cycle
The larvae develop in soil, feeding on roots and decaying plants after hatching from white eggs.
Source: Wikipedia
When you see it
Adults are active from March through May.
Source: Wikipedia
Where it is found in the US
Recorded in 4 of 51 states and DC. Most records: California, Arizona, New Mexico, Oregon.
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
What do the larvae eat?
The larvae feed on roots and decaying plant material in the soil.
Source: Wikipedia
What other beetles might I mistake them for?
They are easily confused with other Hoplia species such as H. hirta and H. laticollis.
Source: Wikipedia
Same family (Scarabaeidae)
Japanese BeetlePopillia japonicaDamages trees, gardens or crops
Common Green June BeetleCotinis nitidaDamages trees, gardens or crops
Phyllophaga crinitaDamages trees, gardens or crops
European Rose ChaferCetonia aurata
Mediterranean Spotted ChaferOxythyrea funestaDamages trees, gardens or crops
Oriental BeetleExomala orientalisDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Hoplia_callipyge
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.