ECONOMIC 20OLOGY 



manure; this consists of a wooden platform of slats over a shallow 

 concrete tank of water. The manure is piled on this platform and 

 is kept wet; the maggots in their migrations fall through the slats 

 and drown in the water. This very simple arrangement, Fig. 74, is said 

 to destroy 99 per cent, of the fly larvae in the manure. Details of 

 construction and operation may be obtained from the U. S. Depart- 

 ment of Agriculture. 



The trapping and poisoning of the adult fly is understood by most 

 persons and a vigorous campaign along this line undoubtedly helps 



A R 



FIG. 75. Termites. A, male or king of Termes slightly enlarged; B, female 

 or queen of Termes, slightly enlarged. C, worker and D, soldier of Termes, consider- 

 ably enlarged. (From Hegner, College Zoology, after Cambridge Natural History, 

 C and D from Grassi.) 



diminish the numbers of flies, though not so effectively as the methods 

 just mentioned. This subject is also treated in the bulletins issued by 

 the Department of Agriculture. 



Termites or "white ants," Fig. 75. These interesting insects are 

 not true ants; they are variously classified by different writers, but are 

 usually placed in the order Neuroptera. There are a hundred or more 

 described species and many species that have never been named. 

 Their colonial mode of life and their superficial resemblance to ants 

 have doubtless given them the name "white ants." As among the 

 hymenopterous colonies, the termites exhibit several forms of indi- 



