» 



Explanation op Plate IL 



Fig. 1. — The pine-leaf scale-insect, Chionaspis pinifolii (Fitch): £, the scales on 

 the leaves in natural size: «, leaves not stunted by the presence of 

 the scales; b, scale of female of usual form, enlarged; c, wide form 

 of the same, enlarged; d, a male scale enlarged. (After Comstock.) 



Fig. 2.— The white scale, Aspidiotus nerii Bouche, on an Acacia twig, in natural 

 size: a, the male insect, enlarged; b and c, the male and female scales, 

 enlarged, (After Comstock.) 



