Xymmer Santschi 1914

Key to known Xymmer species based on workers adapted from Satria et al., (2016) 1 Head narrow, distinctly longer than wide (CI 73.4) (Figure 5C); in full face view, lateral head margins subparallel (Figure 5C); anterior margin of clypeal lobe convex (Figure 5C). Smaller in size (HW <0.35)........................... X. paniscus - Head subquadrate, just longer than wide (CI 83—86.5) (Figure 1B); lateral margins converging posteriorly (Figure 1B); anterior margin of clypeal lobe straight or concave (Figure 1B). Larger in size (HW> 0.5)................................. 2 2 Clypeal plate three times as broad as long; anterior margin of clypeal lobe straight (Figure 1B)............... X. muticus - Clypeal plate six times as long as broad; anterior margin of clypeal lobe concave............................ X. phungi