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, jumping 



Fig. 66 Cheese skipper: a larva; & puparium; c pupa; d male fly; e female with 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 ^ 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- 

 d a r i u s ). A dark brownish beetle 

 abont j\ inch long with yellowish band across the base of the 

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



Fio 67 Racon beetle: a larva, 

 enlarged; b Inrval bristle, greatly 

 enlarged; o beetle 



