Cedar Creek
Ecosystem Science Reserve


Insects of Cedar Creek

Order HEMIPTERA

Family LYGAEIDAE

(Seed Bugs)

(Table of Species)

The Seed Bugs (295 NA spp) are a rather large diverse family of seed feeders found in numbers on the ground or vegetation. Some are suspected to be predaceous. Ground dwellers are likely to be undercollected by sweeping. Nearly 40 species have been collected at CCESR. They are discussed below by tribes.

Lygaeus kalmii is fairly common on Asclepias spp in weedy fields. Lygaeospilus tripunctatus has been taken in small numbers in late summer from a few prairie fields (host--Solidago?).  Neacoryphus bicrucis is apparently a rare species on milkweed.  First collected in 2000.  Oncopeltus fasciatus (host--Asclepias), a common southern species, was first observed at Cedar Creek during the summer of 2003.

At least two species of Geocoris occur in CCESR old fields. They are small ground species with large eyes. G. uliginosus is the most common and has an entirely black scutellum. It occurs in fair numbers in a variety of fields. G. bullatus has a yellow and black scutellum and has only been taken in xeric fields. A third species of Geocoris sp has been collected from the bog surrounding Beckman Lake. Phlegyas abbreviatus is a common species of Poa fields.

Nysius niger is a widespread, abundant species found primarily on horseweed (Erigeron canadensis) in weedy fields. Other undifferentiated species of Nysius probably occur here. Xyonysius californicus has only been taken in a few fields Ortholomus scolopax is sometimes common in the flower heads of Monarda fistulosa and also Hedeoma hispida. Blissus leucopterus, the Chinch Bug, has only been taken in a few fields. Crophius disconotus has only been taken in dry weedy LEM. Ischnodemus falicis is abundant in the seed heads of Prairie Slough Grass (Spartina pectinata) in HAS.

Kleidocerys resedae (red) is a shrub-carr inhabitant (host--dogwoods?). K. geminatus (gray) may also have been collected. Three species of Cymus have been collected. C. discors and C. angustatus are quite common in marsh habitats where they occur in the heads of Scirpus cyperinus. C. luridus is found on bulrush heads (Scirpus sp) in Fish Lake.

Slaterobius insignis is a shiny, ground-dwelling species resembling an ant. It is most common in xeric fields. Pseudocnemodus canadensis is a rare species taken on mullein. Ligyrocoris diffusus is a common ground-dweller in a variety of fields. A second species of Ligyrocoris, L. sylvestris, has been taken from the heads of cotton grass (Eriophorum sp) at Beckman Lake. Less common, but strongly resembling Ligyrocoris are Zeridoneus costalis and Perigenes constrictus. They are most likely encountered in weedy fields. Kolenetrus plenus and Carpilis consimilis were collected from CNW and C respectively in 1995.

Probably the most common woodland Lygaeid encountered is the small colorful Scolopostethus thomsoni. Xestocoris nitens (Plinthisus americanus?) is a rare chestnut colored species of woodland as is the still smaller Antillocoris minutus. Both appear to be uncommon. Drymus unus is a rich brown woodland species found on Aralia. Uncommon species of savanna include Trapezonotus arenarius, Atrazonotus umbrosus, Sphragisticus nebulosus and Peritrechus ?saskatchewanensis. A few individuals of Eremocoris ferusand Megalonotus sabudicola have been collected. Oedancala dorsalis is a relatively uncommon species of marshes/grassy swales. Emblethis vicarius is a ground-dweller sometimes common in xeric sandy fields.


webmaster@cedarcreek.umn.edu Last updated May, 2000