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Notes: Abstract: This report investigates the mite Hemisarcoptes coccophagus, an obligate parasite of armoured scale insects (Homoptera: Diaspididae), with respect to its likelihood to change food preferences in response to changes in relative food abundance; models predict that host rejection, but not differential survival, can create frequency-dependent parasitism (FDP); four species of armoured scale insects were sampled: Parlatoria pergandii, P. cinerea, Hemiberlesia lataniae and Aspidiotus nerii.