SCALE INSECTS OF IMPORTANCE 363 



PLATE S 



Putnam's scale insect 



Aspidiotus ancylus Putnam 



FIG. 



T Group of young scales on pear, enlarged 



2 Several young scales, greatly enlarged 



3 Portion of currant twig with young scales, natural size 



4 Same much enlarged 



5 Half-grown scales on white birch, enlarged 



6 Badly infested twig of Ilex verticillata, enlarged 



7 Portion of above, greatly enlarged 



8 Male scale, very much enlarged 



9 Female scale, very much enlarged 



10 Female as removed from under a scale, very greatly enlarged 



11 Young scale insect, very greatly enlarged 



PLATE 6 



Cherry scale insect 



Aspidiotus forbesi Johnson 



FIG. 



1 Dorsal view of white scale, very much enlarged 



2 Same from a nearly side view, very much enlarged 



3 Group of young scales, much enlarged 



4 One scale from the above, still more enlarged 



5 Two half- grown scales, very much enlarged 



6 Twig infested with full-grown scales, natural size 



7 A group of scales from the above, more enlarged 



8 Female scale, very much enlarged 



9 Two male scales, very much enlarged 



10 Female as removed from under a scale, very much enlarged 



PLATE 7 



White scale insect of the ivy 



Aspidiotus hederae Vallot 



FIG. 



1 Female as removed from under her scale, very much enlarged 



2 Active young, very much enlarged 



3 Young scale, very much enlarged 



4 Adult female scale, very much enlarged 



5 Shriveled female as found under the scale after all her eggs are laid, 



very much enlarged 



