148 



DIPTERA OF MINNESOTA. 



fly sometimes, particularly in tlie fall, enters the house. It is an 

 unpleasantly evident fact that stable flies can penetrate thin cloth; 

 ing with their sharp beaks. It is found in large numbers about stables, 



Fig. 143. Stable Fly. Enlarged. Lugger. 



hence its name, where it annoys stock. Like the house fly, it lays 

 its eggs in, and the larvse feed upon, fresh horse manure. Disposing 

 of this horse manure promptly lessons the evil. Stock is but little 

 molested in a darkened stable. 



Fig. 144. Mouth parts of Stable Fly, much enlarged. The pointed proboscis projects in 



front of the head. Lugger. 



THE HORN FLY. 



Hacmatobia serrata, R. Desv. 



So called because of its habit of clustering at the base of the 

 horns of cattle (see illustration). It in no way injures the horn, 

 though it at one time was believed to do so. Such a situation ap- 



