The head is triangular with the point directed forwards and notched at the apex. Ventrally there is a median longitudinal groove on the head which fits around the hair of host. As an ectoparasite, biting or chewing lice have mouth parts that are designed for chewing, not sucking, and they can feed on hair or skin scales. Adult females lay their egg cases with in the animals hair by cementing the egg case to the hair shaft.
The louse is of minor importance, being found in large numbers only on elderly or sick cats especially if they are long-haired.
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