OTHER FLIES FREQUENTING HOUSES 



IN 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 



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