THE CANADIAN ENTOMOLOGIST. 



GO 



hairy grubs, about one-third inch long. They are often found in museunfis, 

 and sometimes overran pantries and rooms containing meat, cheese and 

 other animal products. 



When a room becomes badly infested, it should be cleared of its 

 contents, and thoroughly treated with either benzine spray or the fumes 

 of carbon bisulphide, when there is no fire or light near. Occasional 

 treatment in this way will keep the room practically free from these dis- 

 asrreeable beetles. 



Cheese, Ham and Flour Mites. — There are two common species 

 of mites infesting the pantry, viz.: Tyi'oglyphus longior and Tyroglyphus 

 siro. (Fig. 8.) These pests breed very rapidly, and are .especially fond 

 of cheese. They can remain for months in a dormant condition as hard- 

 shelled creatures, and under favourable conditions return to a state of 



activity. It is believed that it is while they are in 

 this torpid state they are carried to new places 

 and new food supplies. 



Complete extermination of these mites is 

 difiicult, but if the infested room be thoroughly 

 cleaned, and given a careful fumigation with 

 sulphur or carbon bisulphide, little headwa}'^ can 

 be made by these creatures. Infested food 

 products should be destroyed when first observed. 



Flour-beetles, Flour-moths and Meal- 

 worms. — Some Meal-worms are grubs of certain 

 beetles, while others are caterpillars of certain 

 moths. The most common forms are the Con- 

 fused Flour-beetle (Tribolmui confiisicvi), the Yellow Mealworm 

 ( Tenebrio violitor), the Meal Snout-moth ( Fy rails farina/is), the Saw- 

 toothed Grain-beetle (Sih>a?tus surinameiisis), and the Cadelle ( Tene- 

 brioides inauritanicus), the last two species being most destructive in 

 stored grain. 



The most effective treatment of flour and meal pests is fumigation 

 with carbon bisulphide. Half a cupful poured into a saucer placed on the 

 top of the flour will suffice for a barrel, if the whole is covered tightly and 

 left for a day or two. It must be borne in mind, however, that it is 

 dangerous to bring a light near the vapour of carbon bisulphide, and great 

 care should be exercised.  



Fig-. 8. — Cheese-mite.greatly 

 masfnified. 



