Sheep Tick
a well-known dipterous insect (Melophagus ovinus) belonging to the family Hippoboscidæ or horse flies.
The pupæ produced from the eggs are shining oval bodies which become attached to the wool of the sheep. From these issue the tick, which is horny, bristly, of a rusty ochre color, and wingless. It fixes its head in the skin of the sheep and extracts the blood, leaving a large round tumor. Called also sheep louse.