Psallus proteus Puton in Noualhier, 1889: 305. LT (Kerzhner & Matocq, 1994: 64): male, Madeira; MNHN.
Psallus proteus var. infuscata Reuter, 1904e: 12. HT: male, Madeira; MNHN.
Psallus proteus var. rubropicta Reuter, 1904e: 12. HT: Madeira; not located (Kerzhner & Matocq, 1994: 64).
Psallus proteus var. reducta Reuter, 1904e: 13. HT: the LT of proteus, Madeira; MNHN.
Psallus proteus var. rubicunda Reuter, 1904e: 13. HT: female, Madeira; MNHN.