Key to species groups (3) of Solariola Flach, 1908

1. Pronotum at base with echinopappolepida. Rostrum slender (FW/MW: ratio 2.20–2.60). Medium to large size species (2.90–4.00 mm). Figs. 1F, 2A, 2D, 44 a–44o. Sicily .................................................. S. doderoi species group

1’. Pronotum at base without echinopappolepida. Rostrum less slender (FW/MW: ratio 2.00–2.15). (Figs. 2B, 2C, 2E, 2F). Small to medium size species (2.15–3.20 mm)..................................................................... 2

2. Body slender. EL/EW: 2.00–2.10. Figs. 46 a– 46n. Sicily, Calabria ........................... S. paganettii species group

2’ Body more robust. EL/EW ratio: 1.75–1.90. Figs. 45 a– 45n. Southern Italy ...................... S. gestroi species group