Psomophis obtusus (Cope, 1863)

Type locality. Paysandu, Uruguay .

Distribution. Known from Argentina, Brazil, Paraguay, and Uruguay (Plt.346A).In Brazil, widespread in the Pampas Grasslands (Plt. 346A) at low elevations (Plt. 346B). Observed in the field in grassland and disturbed areas (Yanosky et al., 1996).