APPENDIX I . 279 



entered as "abundant," and among the captured two 

 others. With these facts in mind we are prepared to 

 examine the results of the kitchen and dining-room 

 captures. 



The results so far stated have a distinct entomolog- 

 ical interest as regards the exact food habits of a large 

 number of species, many of the observations being 

 novel contributions to previous knowledge of these 

 forms; but the practical bearing of the work is only 

 brought out when we consider which of these forms 

 are likely from their habits actually to convey disease 

 germs from the excrement in which they have bred, or 

 which they have frequented, to substances upon which 

 people feed. Therefore collections of the Dipterous 

 insects occurring in kitchens and pantries were made, 

 with the assistance of correspondents and observers in 

 different parts of the country, all through the summer 

 of 1899 and also in the summer and autumn of 1900. 

 Such collections were made in the States of Massachu- 

 setts, New York, Pennsylvania, District of Columbia, 

 Virginia, Florida, Georgia, Louisiana, Nebraska, and 

 California. Nearly all of the flies thus captured were 

 caught upon sheets of the ordinary sticky fly paper, 

 which, while ruining them as cabinet specimens, did 

 not disfigure them beyond the point of specific recog- 

 nition. The others were captured in the ordinary man- 

 ner. 



In all there were examined 23,087 flies, which had 

 been caught in rooms in which food supplies were or- 

 dinarily exposed ; and they may safely be said to have 



