At low magnification, which feature most differentiates sucking from biting lice?

Name: At low magnification, which feature most differentiates sucking from biting lice?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The shape of the mouthpart is the most distinguishing feature between sucking and biting lice, as sucking lice have a long, thin proboscis used for feeding on blood, while biting lice have a flat, broad head with mandibles for biting and cutting the host's skin. This feature can be observed at low magnification.

At Low Magnification, Which Feature Most Differentiates Sucking from Biting