Bug FAQAsphondylia ambrosiae
Asphondylia ambrosiae · Order: Diptera · Family: Cecidomyiidae
These midges make fuzzy, round galls on the buds of ragweed plants. The immature insects turn into pupae inside those galls before emerging.
Source: Wikipedia
How to recognize it
The insects create fuzzy, globular galls on ragweed buds.
Source: Wikipedia
Where it lives
They are found on ragweed (Ambrosia species).
Source: Wikipedia
Life cycle
Young stages pupate within the galls they form.
Source: Wikipedia
Where it is found in the US
Recorded in 8 of 51 states and DC. Most records: Florida, Texas, Louisiana, California, Alabama, Oklahoma, Mississippi, Indiana.
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
Where do I see these insects?
Look for them on ragweed where fuzzy bud galls appear.
Source: Wikipedia
Same family (Cecidomyiidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Asphondylia_ambrosiae
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.