Bug FAQCasey's June Beetle
Dinacoma caseyi · Order: Coleoptera · Family: Scarabaeidae
Casey's June beetle lives only in the alluvial sand of Palm Canyon Walsh and Tahquitz Creek near Palm Springs, California. It is listed as endangered and has about 587 acres (237 ha) of critical habitat in Riverside County. Adults emerge from the ground between late March and early June, with most sightings in April and May.
Source: Wikipedia
How to recognize it
Female Casey's June beetles are rare and have a large abdomen, short legs and antennae, and reduced forewings.
Source: Wikipedia
What it eats
Larvae probably eat any organic material they encounter in the alluvial sand, such as layered debris.
Source: Wikipedia
Life cycle
The larval stage likely lasts about one year. Pupal skins have been found 4 to 6 in (10 to 16 cm) below the surface.
Source: Wikipedia
When you see it
Adults leave their burrows from late March to early June, with peak numbers in April and May. Males fly near dusk during this period.
Source: Wikipedia
Where it comes from
Their native range is limited to those two sites in Palm Springs, California.
Source: Wikipedia
Where it is found in the US
Recorded in 1 of 51 states and DC. Most records: California.
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
When do Casey's June beetles appear?
Adults emerge from the ground between late March and early June, most commonly in April and May.
Source: Wikipedia
Where can I find Casey's June beetles?
They are known only from Palm Canyon Walsh and Tahquitz Creek near Palm Springs, California.
Source: Wikipedia
What do the larvae eat?
Larvae likely consume any organic debris they encounter in the alluvial sand habitat.
Source: Wikipedia
How long does the larval stage last?
The larval cycle is probably about one year long.
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/Casey%27s_June_beetle
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.