DIPTEEA OR TRUE FLIES. 



255 



as a bright, shiny, chestnut-brown body, oval in form, with 

 truncate ends. When the female deposits a puparium she fixes 

 it to the wool by a gluey sub- 

 stance, so that it cannot fall off. 

 Taschenberg says each female 

 may produce eight such puparia ; 

 the author has found that seldom 

 more than four are so produced. 

 The spider -like fly comes from 

 these shiny, glass-like puparia in 

 from three to four weeks. They 

 get on to the sheep either from 

 one sheep coming in contact with 

 another or from the ground, where 

 they may hatch out from the 

 fallen puparia. They get to the 

 sucking lambs from the ewes, 

 and often annoy them immensely, 

 puparium stage. 



Remedies. — This and all sheep external parasites are readily 

 amenable to treatment. Dipping soon destroys all these para- 

 sites, but as a rule two dippings are necessary, the second about 

 a month after the first, so as to kill off those hatched from the 

 puparia. 



-Sheep-tii'k {Mdopliagus 

 oviitas). 



The winter is passed in the 



The Forest ob Hoese Fly (Hippobosca equina). 



The Forest Fly is only of local importance, as it is seldom 

 sufficiently abundant to be obnoxious except in the New Forest, 

 where it is a terrible pest to horses and cattle, and in parts 

 of North Wales, especially in the Snowdon area, where I 

 have seen it in great abundance, notably in the Pen-y-Gwryd 

 and near Quellyn Lake. It was well known to many of the 

 local drivers.^ The fly is the fourth of an inch long and 

 ^ Miss Ormerod also records it from Breconshire. 



