2 BULLETIN NO. 200, U. S. DEPARTMENT OF AGRICULTURE. 
what isolated by its position on a hill and separated a considerable 
distance from any near-by stables. On the accompanying map 
(fig. 1), which has been adapted from a map of the Geological Suryey, 
is shown the topography of the surrounding section. The location of 
only two of the college buildings is given, viz, the college kitchen 
(K) and the stable (S) . The college kitchen, by reason of odors from 
cooking and the presence of large quantities of garbage kept in iron 
pails just outside the door, attracted extremely large numbers of 
flies. One could not approach these garbage pails without stirring 
up a nois} r swarm which had congregated there. However, no flies 
were breeding out from this garbage, for the reason that it was 
Fig. 1. — Map of vicinity of the Maryland Agricultural College showing the location of the college kitchen 
(K), the stable (S), and the proximity of other breeding places of flies (A, B, C, D, etc.) (Original.) 
entirely removed every two or three days and taken to a near-by 
farm, where it was fed to hogs. 
The breeding ground nearest to the kitchen was the pile of manure 
heaped just outside the college stable. This is nearly 200 yards 
northwest of the kitchen. It is probable that a large majority of 
the flies at the kitchen came from this source. Upon examination at 
various times during June and July the fresher portions of this heap 
were always found heavily infested with larvae. Pup aria were also 
found in great abundance in the loose soil and in the manure at the 
periphery of the pile. Three horses were kept in this stable, and 
two of them were standing in the stalls during the greater part of 
each day. Flies were also very numerous in and about the stable, 
and during the day the horses were continuously tormented by them. 
