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Comment: These parasitic, wingless flies were reported from the bat Corynorhinus townsendii. 
Bibliography: Suggett (1982). 
Family Muscidae (house flies) 
Undetermined 
Records: Amador Co.: Rippled Cave. San Bernardino Co.: Peggy 5 Cave. Santa Cruz Co.: Bat Cave; Empire Cave. 
Shasta Co.: Ancient Palace Cave; Subway Cave. Siskiyou Co.: Apogee Cave. Tulare Co.: Ursa Minor Cave. 
Bibhography: Graening (2010); Ubick (2001). 
Family Nycteribiidae (bat flies) 
Basilia antrozoi Townsend 
Records: Kern Co.: crevices in sandstone outcrop near Cameros Spring. San Luis Obispo Co.: crevices in sandstone out¬ 
crop, Carizzo Plain; crevices at La Panza Ranch. 
Bibhography: Orr, R.T. (1954). 
Family Phoridae (scuttle flies) 
Undetermined 
Records: Tuolumne Co.: McLean’s Cave; Transplant Mine. 
Comment: Several species were probably transplanted from McLean’s Cave to the Transplant Mine. 
Bibhography: Briggs (1975); Elliott (1978). 
Megaselia (Megaselia ) sp. 
Record: Tulare Co.: Cedar Cave. 
Bibhography: Lee (1985a). 
Family Piophilidae (skipper flies) 
Undetermined 
Records: Santa Cruz Co.: Empire Cave; Stump Cave. 
Bibhography: Ubick (2001). 
Family Sphaeroceridae (small dung flies) 
Undetermined 
Record: Siskiyou Co.: Rollercoaster Cave. 
Bibhography: Taylor and Krejca (2006). 
Leptocera sp. 
Records: Santa Cruz Co.: Empire Cave. Siskiyou Co.: Arch Cave No. 2; Mushpot Cave. 
Bibhography: Taylor and Krejca (2006); Ubick (2001). 
Spelobia (Spelobia ) sp. 
Record: Tulare Co.: Cedar Cave. 
Bibhography: Krejca (2006); Lee, V.F. (1985). 
Xenelimosina sicula Marshall 
Record: Trinity Co.: Forest Glen Cave. 
Bibhography: Marshall (1985). 
Family Streblidae (bat flies) 
Trichobius corynorhini Cockrell (parasite) 
Record: Siskiyou Co.: Planetary Dairy Cave. 
Comment: Three males of this parasitic bat fly were collected, presumarly from or near Corynorhinus townsendii. 
Family Syrphidae (flower flies) 
Undetermined 
Record: Siskiyou Co.: *Catacombs Cave. 
Bibhography: Taylor and Krejca (2006). 
