15 



Scale, matured, one twelfth of an inch in diameter (in a few cases it exceeds this); 

 color, center, yellow, margin, light brown; eggs, from twenty to forty under each scale; 

 form, ovoid; color, bright yellow; antennae, six-jointed. Female insect: color, yellow. 

 Male insect (perfect), winged, about one forty-fifth of an inch in length; wings clear, 

 nearly transparent; color of body, amber yellow, with slight dark markings; anal stylet 

 appendage nearly as long as body. 



In some parts of Los Angeles County, also in Sacramento City and about Marysville, a 

 distinct variety of red orange scale is found. According to the best authority, it cannot 

 be considered specifically distinct from the Aspidiotus aurcmtii, yet its appearance and 

 manner of attack are so different that I have thought it worthy of a special plate. The 

 difference of opinion in Los Angeles County as regards the efficacy of certain remedies, 

 and also as regards the more or less dangerous character of the red scale, is doubtless 

 due to the fact of the two varieties being confounded. Of the two the first named or true 

 type must be regarded as the most dangerous. The appearance of trees infested with 

 this pest is very striking, very much resembling those diseased from other causes, such 

 as bad drainage, the leaf representing a mottled appearance, a light blotch around the 

 scale contrasting with the natural green of the leaf. The branches are but little troubled, 

 but the fruit, like the leaf, becomes completely covered with the insects. An orange tree 

 infested with this scale gradually becomes sickly and languishes, though I have never 

 seen any that were actually killed by this scale. 



Figure No. 7. 



The chief difference between these two varieties, if they are not to be 

 called species, is that of color, the latter being of a much paler yellow 

 than the true type. Trees imported from Japan are often infested with 

 this form, and the probability is that it was imported from that country, 

 while the other, or true form, came from Australia. Where this variety 

 is it is very destructive. Plates II and III show the appearance and 

 characteristic work of these two forms. 



