43 2 Phylum Arthropoda 



which connects with a milk bottle or other glass container samples of 

 flies from the stock cages for use in experimental work may easily be 

 taken by taking advantage of the positive phototropism of the fly. In 

 some types of experimental work, it might be more suitable to use the 

 method developed by F. L. Campbell and W. N. Sullivan (1934) where 

 all the flies are chilled at 30 F. for 15 minutes. These paralyzed flies 

 are then mixed and the number to be used in the experiment rapidly 

 counted into petri dishes or other enclosed cages which are then brought 

 back to the constant temperature room where the flies all revive to 

 normal activity in about 10 minutes. Such a treatment has not ap- 

 peared to effect the resistance or subsequent activity of the flies. 



Bibliography 



Campbell, F. L., and Sullivan, W. N. 1934. Soap (Sanitary Products Section) 



10, No. 3:81, 82, 83, 85, 87, 103, 107. 

 Glaser, R. W. 1923. The effect of foods on longevity and reproduction in flies. 



J. Exper. Zool. 38:383. 

 1924. Rearing flies for experimental purposes with biological notes. /. 



Econ. Ent. 17:486. 



1927. Note on the continuous breeding of Muse a domestica. Ibid. 20:432. 



Grady, A. G. 1928. Studies in breeding insects throughout the year for insecticide 



tests. I. House flies (Musca domestica) . Ibid. 21:598. 

 Hockenyos, George L. 1931. Rearing house flies for testing contact insecticides. 



Ibid. 24:717. 

 Richardson, H. H. 1932. An efficient medium for rearing house flies throughout 



the year. Science 76:350. 



THE CULTURE OF MUSCINA STABULANS * 



Evelyn George Grieve, Cornell University 



FLIES were reared through numerous generations, the year round, 

 using very simple methods. 



The adult flies need to be kept in a warm room, 76 to 8o° F., and 

 preferably near a window, although direct sunlight should be avoided. 

 A spacious cage is recommended as overcrowding may have a tendency 

 to retard oviposition. A satisfactory size is 18 x 18 x 72 inches and 

 is suitable for about 250 flies. The type of cage used in this rearing 

 work was made of cheesecloth, with top and bottom (18" x 18") of 

 beaverboard, the two fastened together by means of gummed paper. 

 A celluloid window about 16" x 16", in one side near the bottom, is 

 very useful, and may be sewed into the cheesecloth on a sewing machine. 

 The opening to the cage may be provided with a cheesecloth sleeve for 

 convenient closing. 



The flies require a constant supply of water; a convenient arrange- 



*Project carried out for the N. Y. State Conservation Commission, rearing larvae as 

 food for young grouse. 



