26 



SCALE INSECTS. 



Fig. 6. — a, female scale, from below, showing eggs; 

 6, same, from above — greatly enlarged; c, female 



scales — enlarged; d, ; c, male scales on 



twig — natural size. (From U. S. Year-book, 

 Dept. Agr.) 



Scale of Female. The .scale of the female is long, nar- 

 row, and grows wider as it extends backward. It is an ash- 

 gray color. The larvae skin is yellow. The length of scale 

 is about .08 of an inch. 



The Male Scale. The scale of the male is much smaller 

 and does not contain the curve shown in female scales; is 

 nearly straight, widening posteriorly. The figures, fully il- 

 lustrating all stages, require no further discussion. 



Descriptions and discussions of other scale pests might 

 be given. Enough has been said to impress those inter- 

 ested in tree culture with the great economic imjiortance of 

 scale insects. Enumeration of various species is, then, of 

 secondary merit in an article of this class. 



Remedies. Application of the soap wash in the fall be- 

 fore death of female, and about the middle of June, when 

 young are all hatched. 



