Cattle biting louse, Bovicola bovis (Mallophaga: trichodectidae), phoretic on the horn fly, Haematobia irritans (Diptera: Muscidae).
D000818:Animals; D002417:Cattle / Q000469:parasitology; D004175:Diptera / Q000469:parasitology*; D008003:Phthiraptera / Q000302:isolation & purification*