The Sage Leafhopper is widespread in the UK and feeds on sap of not only of sage (its main host)
but also various herbs such as mint (shown here), rosemary, marjoram, thyme and lavender. They may cause some pale mottling to leaves.
Adults are winged and are some 3-4mm long. Nymphs are off-white, hairy and wingless. The adults look similar
to the Ligurian Leafhopper below. The main visible difference is that the Sage has 3 black spots on its face and the Ligurian has 4.
The Ligurian Leafhopper is similar in size, appearance and host plants to the Sage above.
The key visible difference is the 4 black spots on its face rather than 3. It colonised the London area from continental Europe
only in the early 2000s and is spreading to southern UK. Here it is using the underside of mint as a host.