Published online by Cambridge University Press: 31 May 2012
Cardiastethus borealis n. sp. is described from Canada, and Melanocoris longirostris n. sp. from Canada and western United States. Two species described from Europe, Acompocoris pygmaeus (Fallen) and Temnostethus gracilis Horvath, are recorded for the first time from North America. Adults and male genital claspers are illustrated and scanning electron micrographs of their osteolar canals are included.