INSECTS INJURIOUS TO TOBACCO. 237 



becomes full-grown or transforms to the pupa. Such 

 parasitized worms should never be destroyed, as the para- 

 sites are of more value than the damage the worm might 

 do (Fig. 134). 



Fic4. 134. — Southern Tobacco-worm with Cocoons of Parasite. 



(After Garman.) 



INJURING STORED TOBACCO. 



The Cigarette-beetle {Lasioderma serricorne Fab.). ' 



Even after the crop has been cured and has been packed 

 away, sometimes for years, it is subject to the ravages of 

 the larvae and adults of a small beetle, called the Cigarette- 

 beetle. This pest also infests numerous other stored 

 products, household goods, upholstery, etc. The beetle 

 is but one-sixteenth of an inch long, of a brownish color, 

 with the prothorax bent under in front so that the head is 

 obscured as under a hood. The pupal stage is passed in a 

 delicate cocoon; the whole life of the insect being spent 

 in the infested goods. 



Remedies. — Infested tobacco should be o^oened ujd, if 

 packed tightly, placed in tight boxes, or a tight room, and 

 exposed to the fumes of carbon bisulfide, using it the same 

 as for grain-insects. This liquid is very volatile, giving 

 off a gas heavier than air and fatal to all insect life. The 

 quantity used would depend upon the tightness of the 



