Explanation of Plate 3. 



Fig. i. Female scale of Chionaspis salicis-nigrae. 



Fig. i A. Male scale of the same species. 



Fig. 2. Female scale of Chionaspis plataiii. 



Fig. 2 A. Male scale of the same species. 



Fig. 3. Female scale of Chionaspis lintneri. 



Fig. 3 A. Male scale of the same species. 



Fig. 4. Female scale of Hemichionaspis minor. 



Fig. 4 A. Male scale of the same species. 



Fig. 5. Female scale of Chionaspis herbae. 



Fig. 5 A. Male scale of the same species. 



Fig. 6. Female scale of Chionaspis dysoxyli. 



Fig. 6 A. Male scale of the same species. 



Fig. 7. Female scale of Chionaspis stanotophri. 



Fig. 7 A. Male scale of the same species. 



Fig. 8. Female scale of CJiionaspis ortJiolobis. 



Fig. 8 A. Male scale of the same species. 



Fig. 9. Female scale of Hemichionaspis rJwdodendri. 



Fig. 9 A. Male scale of the same species. 



