Bug FAQHyaline Grass Bug
Liorhyssus hyalinus · Order: Hemiptera · Family: Rhopalidae
Also called: Scentless plant bug
Source: Wikipedia
The hyaline grass bug is a small plant-feeding true bug about 6.5 to 7.5 mm long. It is yellow-brown to red with a dark abdomen, two black spots on the pronotum, and a clear wing membrane that extends past the dark abdomen. Adults are present year-round and it feeds mainly on plants in the Compositae family and on Erodium species.
Source: Wikipedia
How to recognize it
Body colour ranges from yellow-brown to red, with a dark upper abdomen. The clear part of the forewing (hemelytron) reaches beyond the dark abdomen. Two black spots are located at the tip of the pronotum.
Source: Wikipedia
Size
Length is between 6.5 and 7.5 mm (about 0.26 to 0.30 in).
Source: Wikipedia
Where it lives
It belongs to the scentless plant-bug family Rhopalidae, subfamily Rhopalinae.
Source: Wikipedia
What it eats
Feeds on plant material, especially members of the Compositae family and Erodium species.
Source: Wikipedia
Life cycle
Adults can be found throughout the entire year.
Source: Wikipedia
When you see it
Adults are present all year round.
Source: Wikipedia
Where it comes from
It occurs across most of Europe, North America, and many other regions worldwide.
Source: Wikipedia
Lookalikes
Looks similar to bugs in the Rhopalus and Stictopleurus genera.
Source: Wikipedia
Where it is found in the US
Recorded in 40 of 51 states and DC. Most records: California, Texas, Arizona, Mississippi, New Mexico, Colorado, Kansas, Utah.
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 plants does the hyaline grass bug feed on?
It mainly eats plants in the Compositae family and species of Erodium.
Source: Wikipedia
Is the hyaline grass bug a problem for gardens or crops?
Yes, because it feeds on garden plants such as daisies and can damage them.
Source: Wikipedia
How can I recognize a hyaline grass bug?
Look for a 6 to 7 mm bug that is yellow-brown to red, has a dark abdomen, two black spots on the pronotum, and a clear wing membrane extending past the abdomen.
Source: Wikipedia
Same family (Rhopalidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Liorhyssus_hyalinus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.