1 Holotype of Aneuroscelio rufipes Kieffer. The flaring of the posterior margins of the metasomal segments is an artifact. 2–4 Tyrannoscelio cerradensis n.sp., holotype female (OSUC 232307). 2 lateral habitus 3 head and anterior mesosoma, lateral view 4 head and mesosoma, dorsal view. 5–6 T. cerradensis n.sp., male (OSUC 711174) 5 head and mesosoma, lateral view 6 head, dorsal view. Scale bars in millimeters.