DROSOPHILA. Apple Fly. 



I. />. ampelophila. }^ in. Pomace or Wine Flv. Yellowish. Found about wine or cider vats, 

 and live on decaying fruit. 



PHORID/C. Hump-hacJced Flies. 



I'Jiora. Minute flies, found sometimes on windows, sometimes flving anil dancing in swarms. 



Family 30. CESTRID/E. Gud or Hot Flies. Large bee-liUe flies with verv small mouths ; jiarasitic on 

 animal^!. 



CESTRUS. Bot Fly. 



1. (/£. oris. Sheep Bot Fly. ^4 in. ; brown, smooth; body checkered. Lays its eggs in the 



nostrils of slieep ; from there the maggots, when hatched, creep up the passages of the 

 nose and fasten themselves in the chambers of the forehead. 



2. (Ji. pliobifcr. '4 in. : blaclc : chest and tall-end reddisii : wing black banded. CX/ 



GASTROPMILUS. Horse Bot Fly. 



1. G. t-i/z/i. 'j in.: pale yellow, spotted witii red : chest banded with black ; wing 



spotted. It lays its eggs on the knees of horses : the iiatched maggots irritate 

 the horse, which licks the infested spot and gets the maggots into his mouth, 

 and from there they crawl into his stomach where they fasten themselves and 

 stay until full grown, passing out with the excreta. 



2. (r. licviiiiirrlioidaUs. y^ in. : red tail. Lavs its eggs on the lips of the horse. 



3. Cf. vctcrinus. The Farrier Bot Flv. 3/8 in. ; brown. Lavs its eggs under the throat of the horse. 



(60) 



