THE MONTHLY BULLETIN. 



113 



Distribution — The 

 trilnitod throuo-hont 

 rc'Coi-(.k'd as ooeurrin 

 in Yn])a and Butte 

 infestation to grapev 

 species there is the 

 California is phiinly 

 year 1910. 



citrus mealy hug is probably more widely dis- 

 the State than any other species. It has been 

 g in many of the northern counties, particularly 

 counties. Fresno County, also, reported a severe 

 ines, though no one has definitely decided that the 

 citrus mealy bug. The distribution in southern 

 in Fig. 31 prepared by the author in the 



given 



Fig. 2S. — The citrus mealy bug. Orange leaf 

 covered with immature females and the cocoons 

 of the males. (Original.) 



Economic Importance — Of all the mealy bugs this is of the greatest 

 economic importance and has been known and treated by citrus fruit 

 growers for a number of years, though it has been a common insect in 

 some localities since 1880, where it was first observed in San Diego 

 County. All florists are familiar with the destructiveness of this pest 

 in the greenhouses and know how difficult it is to control without injury 

 to the tender plants infested. During the years 1908 and 1910 the mealy 

 bug was particularly destructive in several counties, so much so that 

 not a little experimental work was done to find some methods of sub- 



