sucking louse

The lice we carry around are sucking lice.

Parasitica: the sucking lice: wingless; without metamorphosis; mouth with piercing lancets; thoracic segments similar; habits epizoötic.

We should examine the parts of the skin covered by the long hair for the sucking lice; and the withers, abdomen and limbs for the biting lice.

Anoplura: wingless species without metamorphosis, habits epizoötic, thoracic segments similarly developed: a composite aggregation which includes both the biting and sucking lice.

Nits: the eggs of sucking lice; specifically when attached to a hair: in general, though rarely, applied in the singular to an egg.