INJURIOUS AND BENEFICIAL INSECTS 



37 



ing in eacli about a teaspoonful of carbon bisulfid, then cov- 

 ering the nest with a damp blanket and in a few minutes explod- 

 ing the fumes collected beneath with a light on the end of a short 

 pole. Attract to sponge filled with sweetened water and kill the 

 collected ants by dropping them in hot water. 

 74 Cheese skipper (Piophila casei). Whitish, j amping 



Fig. 66 Cheese skipper: a larva; & puparium; c pupa; d male fly; e female witti wings folded- 

 all enlarged (after Howard, U. S. dep't agr., div. ent., bull. 4, n. s.) 



maggots are sometimes found infesting cheese. The parent insect 

 is a small black fly less than J inch long. 

 This insect will also attack hams, and 

 occasionally causes serious loss. 



Treatment: exclude flies with netting, 

 using 24-to-the-inch mesh. Cleanliness 

 will render cheese factories less inviting 

 to the flies. Hams and cheese stored in 

 darkness are much less liable to infesta- 

 tion. 



75 Bacon beetle (Dermestes lar- 

 darius). A dark brownish beetle 

 about /^ inch long with yellowish band across the base of the 

 wing covers. The larva is brown, hairy, abont f inch long. Both 



Fig. 67 Bacon beetle: a larva, 

 enlarged; h larval bristle, greatly- 

 enlarged; c beetle 



