Key to species of Clusiidae from Fernando de Noronha Archipelago

1. Scutum entirely black (Figs 4, 13)........................................................................ 2

- Scutum with distinct yellow and black spots (Figs 19, 33, 42, 53, 65, 79) Sobarocephala ............................. 3

2. Five fronto-orbital setae, reclinate with the median inclinate (Fig. 3). Legs yellow, except hind tibia brown medially (Fig. 4). Tergites 1–2 mainly yellow (Fig. 4). Wing with C-shaped distal infuscation; alula brown (Fig. 5).................................................................................................... Czernyola fumialula sp. nov.

- Three fronto-orbital setae, reclinate with the anterior inclinate (Fig. 12). Tibiae and apices of femora dark brown to black. Tergites entirely black (Fig. 12). Wing with two dusky transverse bands; alula clear (Fig. 15).................................................................................................... Heteromeringia czernyi Kertész

3. Postpronotal lobe, scutellum, notopleuron, anepisternum anteriorly, and tergites 1–2 ivory white (Figs 42–43)........................................................................................ Sobarocephala icmbio sp. nov.

- No ivory white sclerites............................................................................... 4.

4. Wing with two transverse dusky spots (Fig. 34)....................................... Sobarocephala finnilaei Frey

- Wing clear, at most slightly infuscated distally (Figs 21, 68, 80)................................................ 5

5. Arista densely plumose (Fig. 77). Mediotergite black (Figs 78–79)................................ Sobarocephala sp.

- Arista sparsely plumose (Fig. 18). Mediotergite yellow (Figs 20, 65)............................................. 6

6. Black notal stripes are not connected. Scutellum yellow medially, light brown laterally (Figs 19–20)............................................................................................... Sobarocephala araujoi sp. nov.

- Notal stripes connected posteriorly. Scutellum is entirely black (Fig. 65)....... Sobarocephala protea Lonsdale & Marshall