Hydrotaa Meteorica. Meteoric Fly. 65 



oil (i:io) ; naphthalin (1:10) ; chloro-naphtholeum (1:20); cam- 

 phor and asafoetida, etc. Petroleum or kerosene with a little oil 

 of tar may be sprayed over the back twice a week for the horn fly. 

 Myiases of sheep should be guarded against by clearing the 

 bowels of worms, by docking of lambs, by clipping of soiled wool 

 from tail and hips, and by the application to these and other damp 

 places of an antiseptic solution (creolin, oil of tar, naphthalin, 

 chloro-naphtholeum , carbolic acid or other such agent) . The same 

 agents may be used for destroying the maggots that are already 

 present in the wounds, but it is very essential to scrape these out 

 from their deepest recesses, so that the deeper ones may not 

 escape the myiacide. They may also be applied to the larger 

 animals inside elbow or thigh, in the sheath and elsewhere where 

 sweat or sebaceous secretions accumulate. In the case of the 

 screw worm calomel is a common resort, and has the advantage of 

 being somewhat stable and not readily evaporating. It may, 

 however, be taken into the system in undue amount especially in 

 cattle and could be safely replaced by naphthalin, asafoetida or 

 camphor with oil of tar, or even crude tar water. 



HYDROT^A METEORICA. METEORIC FLY. 



This belongs to the flies that have no coverings (elytra) for 

 their balancers or posterior wings. They affect damp grounds, 

 and are especially active on the approach of rain when they ap- 

 pear around the eyes and nose of horses in dense swarms. They 

 have a soft proboscis which cannot pierce the skin, yet by their 

 great numbers, and the itching and rubbing which they cause, 

 they can determine considerable irritation and even abrasion. 



HIPPOBOSCID.^. PUPIPARA. LOUSE FLIES. 



No eggs laid : pupse produced. All parasites on warm blooded. Wing- 

 less or lose wings. H. Equina, H. Taurina, and H. Canina, cling to bare 

 skin. 



This family is distinguished by the fact that they do not lay eggs 

 but produce pupae or nymphae. They are all parasitic on mam- 



5 



