Key to six new species of Iulidesmus in Colombia (based on male characters)

1. Tarsal brushes present.................................................................................. 2

- Tarsal brushes absent.................................................................................. 3

2. Femora with adenostyles in anterior legs................................................................... 4

- Femora without adenostyles; sternal cones traceables between coxae 4–7; ozopores partly visible from above (Fig. 10); sph broadened laterally near apical part (Fig. 11)....................................................... I. icni n. sp.

3. Femora with adenostyles in legs 4–7 (Fig. 3B–E); sternal cones traceables between coxae 4–7 (Fig. 3A); ozopores invisible from above (Fig. 1); su2 poorly defined; lo more strongly flattened (Fig. 2)........................... I. garciae n. sp.

- Femora without adenostyles; sternal cones traceable between coxae 3–7; ozopores slightly visible from above (Fig. 4); sph with a spine (k) medially at abour midlength in lateral part (Fig. 5)...................................... I. minerus n. sp.

4. Femora with adenostyles in legs 4–6; ozopores partly visible from above......................................... 5

- Femora with adenostyles in legs 4–7; ozopores invisible from above; very small sternal cones traceable between coxae 4–7 (Fig. 12); lm supporting most of sl, much longer and exceeding the ll (Fig. 13)......................... I. jeekeli n. sp.

5. Sternal cones traceable between coxae 4–7 (Fig. 8); sph with evident overlapping elements in apical region; medial distal element much longer and larger than lateral distal element (Fig. 9)................................. I. sabaneta n. sp.

- Sternal cones traceables between the coxae 3–5 (difficult to see) (Fig. 6); an incomplete distal sulcus on fe, apical part of sph bilobate, with subequal, rounded, end lobes (Fig. 7)............................................... I. florezi n. sp.