Apollo
Apollo was worshipped as Actiacus (/aek'taI.@k@s/ ak-TY-@-k@s; Aktiakos, Aktiakos, literally "Actian"), Delphinius (/del'fIni@s/ del-FIN-ee-@s; Delphinios, Delphinios, literally "Delphic"), and Pythius (/'pIthi@s/ PITH-ee-@s; Puthios, Puthios, from Putho, Pytho, the area around Delphi), after Actium (Aktion) and Delphi (Delphoi) respectively, two of his principal places of worship. An etiology in the Homeric hymns associated the epithet "Delphinius" with dolphins. He was worshipped as Acraephius (/@'kri:fi@s/ @-KREE-fee-@s; Akraiphios,[clarification needed] Akraiphios, literally "Acraephian") or Acraephiaeus (/@,kri:fi'i:@s/ @-KREE-fee-EE-@s; Akraiphiaios, Akraiphiaios, literally "Acraephian") in the Boeotian town of Acraephia (Akraiphia), reputedly founded by his son Acraepheus; and as Smintheus (/'smInthju:s/ SMIN-thews; Smintheus, Smintheus, "Sminthian"--that is, "of the town of Sminthos or Sminthe") near the Troad town of Hamaxitus. The epithet "Smintheus" has historically been confused with sminthos, "mouse", in association with Apollo's role as a god of disease. For this he was also known as Parnopius (/pa:r'noUpi@s/ par-NOH-pee-@s; Parnopios, Parnopios, from parnops, "locust") and to the Romans as Culicarius (/,kju:l'kaeri@s/ KEW-li-KARR-ee-@s; from Latin culicarius, "of midges").
What epithet has historically been confused with "mouse?"
Smintheus
The epithet "Smintheus" has historically been confused with sminthos, "mouse", in association with Apollo's role as a god of disease.
mouse