V 
OTHER FLIES FREQUENTING HOUSES 
I N a series of experiments carried on during the sum¬ 
mer of 1900, flies were collected in the kitchens and 
dining-rooms of many houses in many different parts 
of the country. These collections were made in the 
States of Massachusetts, New York, Pennsylvania, 
District of Columbia, Virginia, Florida, Georgia, Lou¬ 
isiana, Nebraska, and California. In all, 23,087 flies 
were thus collected. On critical examination in Wash¬ 
ington by Mr. Coquillett, 22,808, that is to say, ninety- 
eight and eight-tenths per cent, of the whole number 
captured, were Musca domestica. The remainder, con¬ 
sisting of one and two-tenths per cent, of the whole, 
comprised various species, none of them of any espe¬ 
cial significance. These and a few others will be con¬ 
sidered in more or less detail in the following para¬ 
graphs. 
Of course there are other flies than these occasionally 
found in houses, and some quite commonly so. Mos¬ 
quitoes are flies, that is to say, they belong to the or¬ 
der Diptera, but they form no part of the present book : 
they are treated in other volumes. Aside from those 
especially mentioned here, other flies of the same group 
are occasionally found, not attracted to a house, but 
trying to escape from it. Occasionally, however, some 
235 
