35 



For this purpose sheepskin has been foand to be the best; strips four inches 

 wide. A skin, costing say 30 cents, will make ten. 



It must, however, be remembered that bands must necessarily be placed 

 on trees that are being sprayed, and therefore must not be counted as an 

 expense exclusively attending the gas treatment, being common to both 

 spray and gas process. 



MEALY BUGS. 



Order, Hemvptera; Family, Coccidn. 



Figure No. 23. 



Figure No. 22. I'lg" 



Figure 22, Dactylopius Destructor; Figure 23, Dactylopius Adoniduni ; Figure 24, 

 Dactylopiu.s Longifilis. 



Allied to scale insects, and at times equally destructive, are the mealy 

 bugs, of which the genus Dactylopius is a representative. The figures give 

 a good idea of these insects. They are soft and of a pale pink color, gen- 

 erally covered with a mealy powder, hence the name. The common spe- 

 cies, D. adonidum, is found nearly in every greenhouse in the world, and 

 in Californian climate survives on many kinds of plants and have at vari- 

 ous times proved quite troublesome in Los Angeles Ci)unty on oranges. It 



