Nysius is a genus of false chinch bugs in the family Lygaeidae. At least 100 described species are placed in Nysius.
Nysius
Nysius graminicola
Nysius caledoniae male
Nysius ericae
The Lygaeidae are a family in the Hemiptera, with more than 110 genera in four subfamilies. The family is commonly referred to as seed bugs, and less commonly, milkweed bugs, or ground bugs. However, while many of the species feed on seeds, some feed on sap (mucivory) or seed pods, others are omnivores and a few, such as the wekiu bug, are carnivores that feed exclusively on insects. Insects in this family are distributed across the world. The family was vastly larger, but numerous former subfamilies have been removed and given independent family status, including the Artheneidae, Blissidae, Cryptorhamphidae, Cymidae, Geocoridae, Heterogastridae, Ninidae, Oxycarenidae and Rhyparochromidae, which together constituted well over half of the former family.
Lygaeidae
False milkweed bug, Lygaeus turcicus, on Asteraceae flower
Small milkweed bug, Lygaeus kalmii), nymph (bottom) and mature (top)
Large milkweed bug, Oncopeltus fasciatus, on a butterfly weed