Based on literature records and recent collections, 513 species of Mir
idae, or plant bugs, are recorded in a checklist for Colorado. If allo
wances are made for misidentifications and unconfirmed records this to
tal drops to 470 species, which is still the largest number of mirid s
pecies reported from any state in the U.S.A. Of these species, 7 are i
ntroductions, and 22 are Holarctic species indigenous to North America
. Annotations are provided in the checklist giving information on coun
ties of occurrence, host plant records, Colorado type localities, and
instances of Holarctic or introduced species. Cases where the listing
of a species in the state may be potentially erroneous due to misident
ification or taxonomic uncertainty are noted.