640 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



Cleanliness about the house and premises generally will result 

 in much benefit as flies are attracted to dirty places by the sense 

 of smell. 



Other flies are found about the house. Among these, the 



FIG. 553. A "little house fly" (Fannia brevis): Female at left, male at right 

 Much enlarged. After Howard, U. S. Dept. of Agr. 



stable-fly has been mentioned. The blue and green bottle flies 

 are well known and are the usual source of maggots in meat. 

 Some of the flesh-flies also produce maggots in meat when they 



FIG. 554.-The cluster-fly, Polleniarudis FlG - 555. The window-fly, ,Scenopi- 

 Fab. After Howard. nus fenestralis L. After Howard. 



have opportunity. Some flies of other species frequent houses but 

 are harmless. A few of these are illustrated. 



