REMEDIES. 



The black scale infests deciduous trees as well as evergreens, and is 

 especially troublesome on the olive. During the winter they may easily 

 be destroyed by the same washes recommended for the pernicious scale, 

 half the strength being sufficient. On the olive it is much harder to kill, 

 and so far I have not succeeded in finding anything that would kill 

 nearly grown insects without damage to the tree. Kerosene emulsions 

 have been made largely with Mr. E. Cooper, but his recent experience 

 warrants great care in the selection of oil. Personally, I favor the sul- 

 phide of soda soap recommended for scale insects generally. 



Parasites often destroy 50 per cent of this scale, especially the Tomacera 

 californica. Drying winds are also a great check on their spread. 



SOFT ORANGE SCALE. (Figure No. 9.) 



Lecanium Hesperidum (Linn). 

 Probably imported from the Mediterranean. 





Figure No. 0. 



Description of Scale and Insect.— Sci\\c, ovoid, a little wider at one end than at the other; 

 length, from one twelfth to one seventh of an inch ; color, dark brown on convex part, and 

 a lighter brown surrounding margin; it has two indentations on each side, and one on 

 posterior end; eggs from seventy-five to one hundred and twenty-five under each scale. 

 Larva, length about one ninetieth part of an inch; color, yellowish, slightly mottled; 

 seven-jointed anteimse; two anal seta3 as long as body. The viscera can be readily.seen 

 through the scales while maturing; color of viscera, yellowish red; male, winged. 



