■42 



proper atteution to preventive measures would iu a few years greatly reduce 

 the numbers of the insect and procure comparative freedom. The better care 

 usually accorded liorses malces it possible to deal with it iu some respects 

 more easily than the species infecting cattle. The most vulnerable point of 



(Fig. l.'i.i 

 1. Egjrs. natural sizi'. from spocimons obtained in Wrllington : 2. The same rendered 

 transparent to show younjs maggot, magnified : 'A. I'ortion of stomach of horse 

 with larva:; attached, also showing " pits " from w-hich larv;e have heen removed, 

 natural size (from horse that died at Christehurch i : 4. Larv.-e. further developed: 

 5, chrysalis ; G, Female fly, from specimen obtained at Hutt ; 7. Side view of 

 female, showing the way in which the ahdomeu is turned under; 8. Male fly. 

 1-7, from nature ; S, after iliss Omerod. — New Zealand Hulletin 19. 



attack lies iu the conspicuous position of the eggs. No horseman, probably. 



can overloolv these objects when occurring on the horse he is earing for, and 



colts in pasture sometimes become so covered with them as to give a decided 



change ui colour to the parts most affected. It is evident that removing or 



destroying these eggs previous to hatching is all that is necessary to prevent 



" bots '' in the horse. 



During .July. August and Seiiteinber. or as late as eggs ai>pear (in the 



horses, those kei)t in jiastures should be e.Yamiiied once every two or tliree 



weeks and the eggs destroyed or removed. This can be accomplished In 



