Nabis argentinus Meyer-Duer 1870

Pronotum in macropterous form greatly expanded behind, a third wider than long; posterior lobe markedly arched upward. Pronotum in brachypterous form visibly wider than long, but strongly compressed on the sides between the anterior and posterior lobes. Hemelytra in macropterous forms surpassing apex of abdomen; in brachypterous forms, reaching to the base of sixth abdominal segment. Paramere with the distal area more thickened than in the other species of the complex; the blade wide, with a protuberance on the outer margin. Base of the paramere more constricted than in Nabis paranensis. Female genitalia with the styloid more thickened than in Nabis paranensis.

Buenos Aires: Bahía Blanca, Baradero, Ciudad de Buenos Aires, Flores, José C. Paz, La Colina, La Madrid, La Plata, Monte Hermoso, Pedro Luro, Punta del Indio; Catamarca: Belén; Córdoba: Alta Gracia, Bajo Grande, Cabana, Copina, La Puerta, Mar Chiquita, Marull, San Antonio de Arredondo, San Francisco; Chaco: Nueva Pompeya; Entre Ríos: Gualeguaychú; La Pampa: Eduardo Castex; Mendoza: Luján, Tupungato; Río Negro: San Antonio Oeste; Salta: San Lorenzo; San Luis: Nogolí, Quines, San Francisco. Distribution outside Argentina. Uruguay: Artigas, Canelones, Colonia, Durazno, Maldonado, Montevideo, Paysandú.