A MAGGOT TRAP IX PRACTICAL USE. 15 
is large. Finally, it is suggested that the same conditions which 
render the trap most effective are the ones which (end to preserve 
the value of the manure. 
REFERENCES TO LITERATURE. 
Beal, W. H. 
1904. Barnyard Manure. (A revision of Farmers' Bulletin No. 21.) U. S. Dept. 
Agr., Farmers' Bui. 192, 32 p., 4 figs. 
Brown, P. E. 
1913. Farm Manures. Agr. Expt. Sta. Iowa State Col. Agr. and Mechanic Arts, 
Circ. 9, 16 p., illus., April. 
Deherain, P. P., and Dupont, C. 
1900. Sur la composition des gaz confines dans le fumier de ferme. In Ann. 
Agron., Paris, t. 26, p. 273-294. 
Hewitt, C. G. 
1914. Further observations on the breeding habits and control of the house 
fly, Musca domestica. In Jour. Econ. Ent, v. 7, no. 3, p. 281-293, 
figs. 20-21, June. 
Howard, L. 0. 
1911. The House Fly — Disease Carrier. New York. 
Hutchison, R. H. 
1914. The migratory habit of house-fly larvae as indicating a favorable 
remedial measure. An account of progress. IT. S. Dept. Agr., Bui. 
14, lip., Feb. 28. 
Levy, E. C, and Tuck, W, T. 
1913. The maggot trap — A new weapon in our warfare against the typhoid 
fly. In Amer. Jour. Pub. Health, v. 3, no. 7, p. 657-660. illus., July. 
RlNGELMANNj MAX. 
1913. Amenagement des Fumiers et des Purins, 187 p., 103 figs. Paris. (Nouv- 
elle Bibliotheque du Cultivateur.) 
Thorne, C. E. 
1913. Farm Manures, 242 p., illus. New York and London. 
WASHINGTON I GOVERNMENT PRINTING OFFICE : 1915 
