The genera Agria Robineau-Desvoidy, 1830, Angiometopa Brauer & Bergenstamm, 1889, and Toxonagria Shewell, 1987 are diagnosed and their monophyly discussed. Diagnostic character states for the three genera in their present definitions are: Agria: Phallic tube with a pair of lateral sclerotizations slanting antero-ventrally from the apex; acrophallus strongly tapering. Angiometopa: Gonostylus with membranous lobe at base; phallic tube with a pair of armlike processes encompassing base of acrophallus. Toxonagria: Male hind femur thickened and curved; male cercus straight; acrophallus with broad, membranous phallotreme; male gonocoxal lobe with an extra subapical tooth or hook. The name Omocera Lioy, 1864 (an objective senior synonym of Angiometopa) is preoccupied by Omocera Chevrolat, 1835 (Coleoptera: Chrysomelidae). Angiometopa is proposed as a senior synonym of Sarcofahrtia Parker, 1916, syn.n. Agria hikosana (Kurahashi, 1975), comb.n., Agria shinonagai (Kurahashi, 1975), comb.n., and Agria mihalyii (Rohdendorf & Verves, 1978), comb.n. are transferred from their previous position in Angiometopa. Angiometopa bajkalensis Kolomyietz & Artamonov, 1981 is recorded from the Nearctic Region for the first time (Canada: Alberta, British Columbia, Yukon), and Toxonagria arnaudi sp.n. is described from Canada (British Columbia) and USA (California).