IGO 



DIPTERA OF MINNESOTA. 



upon and amongst the feathers of which most uncanny flies, about 

 one-third of an inch long, would be observed crawling, slipping in 

 and out amongst the plumage, in an evident attempt to hide, and in 

 creeping over one's hand or through one's hair affording a very 

 unpleasant and louse-atTected-like sensation. Though these crea- 

 tures had wings, they were not, at those times, observed to use them, 

 but they clung with their claw-like feet persistently to the feathers 

 or to any surface uiion which they were placed. 



These belong to the family of Louse Flics, and they are found 

 in the hair of other animals as well as on the feathers of birds. 

 Some of the species are wingless, and still others pass through a 

 winged stage, and then lose these appendages. 



I'ig. 15(). Sheep Tick and enlarged foot, (/ireatly 



Lugger. 



The sheep tick is found here, a wingless form, especially construct- 

 ed for crawling through the wool when on the living animal, and 

 bearing not the slightest resemblance, superficially at least, to a tly. 

 Its scientific name is Mchphai^us oziiiiis. It was described by Lin- 

 naeus in 1761 under the name 0/ Hippobosca ovinus. It occurs 

 the world over. To the best of the writer's knowledge, this sjK^cies 



