LIFE HISTORY 17 



been reared from cow dung. This dung was in a stable, 

 and it is to be presumed that the conditions were such 

 that the dung did not dry readily and that there was 

 no preferred food in the immediate vicinity. Precon- 

 ceived notions are also somewhat upset by the rearing 

 of 267 flies from carrion found in the street. The list 

 as a whole is of the greatest practical interest and is 



as follows: Number house 



Date Media Hies bred 



Sept. 1-3 Rotten water-melon and muskmelon 14 



Aug, 18 and 



Sept. 8- 1 1 Rotten carrots and cucumbers 23 



Sept. 7 Rotten cabbage stump i 



Sept. 7 Banana peelings i 



Aug. 30 Rotten potato peelings 12 



Sept. 25 Cooked peas i 



Oct. I Ashes mixed with vegetable wastes. i 



Sept. 7-14 Rotten bread or cake 8 



Aug. 22 Kitchen slops and offal 193 



Sept. 10-26 .....Mixed sawdust and rotting vege- 

 tables 41 



Aug. 30-Sept. 4. . Old garbage, city dump 15 



Aug. 14 and 18. . Rotten meat, slaughter houses 40 



Aug. 30-Sept. II . Carrion in street 267 



Sept. 7 Seepage from garbage pile i 



Aug. 17-20 Hogs' hair, slaughter house waste.. 9 



Aug. 23-28 Sawdust sweepings. Stock Yards 



slaughter house no 



Aug. 22, Sawdust sweepings, meat market... 4 



Aug. 16-28 Animal refuse, Stock Yards 39 



Aug. 14 Contents of paunches of slaugh- 

 tered cattle 168 



Sept. 2-11 Rotten chicken feathers 258 



Aug. 16 Chicken manure, stock-car dump. ... 3 



Aug. 31-Sept. 7. . Cow-dung, stable, Urbana 997 



Sept. 7-10 Cow-dung, outdoor yard 22 



Sept. 6 Cow-dung, pasture i 



Aug. 24-Sept. 16. Human excrement 196 



