35a (34b). Head as wide as or wider than prothorax; mouthparts mandibulate; parasites of birds

(with 2 tarsal claws) and mammals (with 1 small tarsal claw) (Figs.A-D)

……………………………………………………………...............……….[chewing lice] Mallophaga

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A B C D

35b. Head usually more narrow than prothorax; mouthparts haustellate (= for sucking);

parasites of mammals with 1 large tarsal claw (Figs.A-B) [sucking lice]……........……..…. Anoplura

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A B