THE SHEEP-LOUSKE. 105 
2.25mm., and is found upon the goat. This species has not 
been found in Minnesota as goats are not numerous in our 
state. 
THE SHEEP-LOUSE. 
(Hiematopinus ovis n. sp.). 
It seems that no sucking-lice have been found upon the 
sheep, at least none have been described as far as the writer 
has been able to discover. While looking for other parasites 
upon this animal Mr. R. H. Pettit discovered a sheep that 
had the hind-legs badly infested by a louse. Those parts 
covered by hair or short wool were chiefly invaded, though 

Fig 76. — Sheep-louse, 
Fig. 75.—Sheep-louse; female and male. Greatly enlarged. 
gg. Greatlyenlarged. Original. Original. 
some lice were found higher up in the wool. During the 
colder days in December the lice also invaded other parts of 
the sheep, still preferring, however, the legs, quarters and 
shoulders. The work of these parasites had been 
noticed some six months previous to their discov- 
ery, and they had during all this time not extended 
the region invaded, nor had they spread to other sheep. 
This would almost indicate that this louse was out of place 
upon sheep. This species is on that account less to be feared 
than the others already described. Yet they had increased 
in the invaded region in immense numbers, which makes it 
still more remarkable that they did not wander to the other 
