36 INJURIOUS INSECTS OF 1904. 



Vinegar and Water: Not desirable. 



Molasses and Vinegar: . Will attract and destroy some moths. 



"Tanglefoot" or Stieky Fly Paper: Something like the sticky 

 mixture used to coat Tanglefoot fly paper can be made without 

 much expense. Hundreds of moths have been caught in a single 

 night on sticky fly paper. The paper should be placed in such 

 places as are frequented by -moths for egg laying, notably on piles 

 of sacks filled with flour, etc. It is evident that if one can catch 

 many female moths before egg laying, the process is well worth 

 the expense incurred, and is a desirable measure. 



Coal Tar: Not desirable. 



Coal Tar and Vaseline: Better than coal tar alone. This and 

 preceding used in the same manner as "Tanglefoot." 



Hand Picking: Not feasible. 



Hay Ropes: A German miller is the authority for the statement 

 that ropes of new mown hay placed about the mill in coils afiford 

 attractive retreats for the moth. These coils were burned with 

 the contained moths each week. 



High Temperature: Exposure to a temperature of 120 to 130 

 degrees Fahr. for two or three hours is claimed to be fatal to the 

 larvae in the flour, and the same temperature for five or six con- 

 secutive hours is said to kill the eggs. This may prove of practical 

 utility. 



Natural Enemies of the Flour Moth. 



Mr. Johnson describes in the American Miller for November, 

 1895, the discovery of one parasite in America, Bracon hebetor, Say. 

 In Europe Bracon brevicornis and Chremylus rnbiginosus are men- 

 tioned as parasites. In 1901 and 1902 'Dr. Fletcher bred two para- 

 sites from the Flour Moth, Idcchthis ephestice, Ash., and one un- 

 named. Poultry, seemingly fond of the "worm," has been kept in 

 warehouses with some good efifect, though the hens appeared to 

 tire of the diet. Mr. Johnson records the eating of a large number 

 of pupae by a mouse, but no millers care to introduce mice into their 

 mills for this purpose. Mice, as all entomologists know, readily 

 eat insects, whether alive, or dead and pinned. 



Triboliiim confusum, a little brown beetle, a common pest in flour 

 mills, and discussed in this connection elsewhere in the report, has 

 been known to devour the pupae of the flour moth. 



