CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 259 



In spring it escapes in the droppings to the ground and Ijores an inch 

 or two below the surface where it pupates (Fig. 164). 



Pupa. — Duration 30-40 days. 



Chin or Nose Flies {G. nasalis Linn. andG. hcemorrhoidalis J^lnn.) . — 

 These flies are a serious annoyance to horses in the West. They have 

 bands of whitish, black and orange-red on the abdomen. 



The eggs of G. nasalis are yellowish; laid on the hairs of the throat. 



Parker (191 6) records the egg-laying of G. hcemorrhoidalis, the red- 

 tailed bot fly. The egg is black, barnacle-like and stalked, and is in- 



FiG. 165. 



-An effective leather fringe device to protect horses from the nose and 

 red-tailed bot flies. {After Dove.) 



serted on the hairs of the lip and nostrils by the stalk. The "striking " 

 of the fly causes a sharp pain and excites a nervous uncontrollable 

 fear in the horse. 



Control. — Administer three or four 4-oz. doses of turpentine, 

 followed finally by an ounce of powdered aloes; stable horses in day 

 time; groom carefully so as to kill or remove the eggs; use fly-nets of 

 loosely dangling cords for G. equi, and wire-screen muzzles, leather 

 nosebands cut into narrow strips or provided with canvas flaps for 

 G. nasalis and hamorrhoidalis (Fig. 165). 



