Table of Families — Part 3

Antennae filiform with three or five joints; no labial palpi. . . . . 1

Antennae clubbed or knobbed and with four joints; four-jointed labial palpi. . . . . 2

1-Antennae three-jointed; tarsi with one claw; found on mammals. . . . . Family Trichodectidae

Antennae five-jointed; tarsi with two claws; found on birds. . . . . Family Philopteridae

2-Tarsi with one claw; found on mammals. . . . . Family Gyropidae

Tarsi with two claws; found on birds. . . . . Family Liotheidae

Any detailed consideration of the habits of these families will be unnecessary, as they do not differ in a sufficiently marked manner to necessitate such treatment.