THE SHEEP-LOUSE. 



105 



2.25nitn., 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. 



( Hmmatoj) in us ovis n . s p . ) . 



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. 75.— Sheep-louse; female and 

 gg. Greatly enlarged. Origiual. 



Fig 76. — Sheep-louse, 

 male. Greatly enlarged. 

 Original. 



some lice v^ere found higher up in the avooI. 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 jDarasites 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 



