330 Transactions. — Zoology. 



short, whereas in my specimens it is of normal length, but 

 possibly he was examining a larva quite recently hatched, 

 whereas mine had been some time alive. 



Westwood's specific name has priority, although his 

 determination of the insect as Dorthezia is erroneous. 



My specimens were collected by Mr. Koebele on Rosa, sp., 

 and Podocaiyus, sp., in China, at Hongkong, Canton, Amoy, 

 and Formosa. The species is therefore by no means confined 

 to the sugar-cane. 



Section BEACHYSCELIN^. 

 Genus Tachaedia. 



In my paper of 1894 I erroneously attributed this generic 

 name to Signoret. Dr. E. Blanchard, of Paris, informs me 

 that it was he who proposed its substitution for Carteria (pre- 

 engaged) in the first volume of his "Treatise on Medical 

 Zoology," and the genus is therefore Tachardia, Blanchard. 



INDEX TO PLATES XVIII.-XXTI. 

 Plate XVIII. 



Pig. 1. Aspidiotus articulatus, diagram to show thoracic spines. 



Pig. 2. Aspidiotus destructor, diagram to show comparative sizes of 



lobes. 

 Pig. 3. Aspidiotus setiger, abdomen of female. 

 Pig. 4. Parlatoria p>erpusilla, insects ou plant. 

 Pig. 5. „ the same, magnified. 



Pig. 6. „ puparia viewed from above. 



Pig. 7. „ puparia, side view. 



Fig. 8. „ reticulation of puparium. 



Pig. 9. „ pygidium of female. 



Plate XIX. 



Pig. 1. Mytilaspis maideni, puparium of female. 



Pig. 2. „ puparium of male. 



Fig. 3. „ pygidium of female. 



Fig. 4. Mytilaspis dejecta, pygidium of female. 



Pig. 5. Mytilaspis craioii, var. canaliculata, underside of puparium with 



enclosed female. 

 Fig. 6. „ diagram of abdominal margin. 



Fig. 7. Fiorinia casuarincB, insects on twig. 

 Pig. 8. „ female, pellicles and puparium. 



Pig. 9. „ pygidium of female. 



Plate XX. 



Pig. 1. Inglisia fossilis, insects on twig. 



Fig. 2. „ test of female viewed from above. 



Pig. 3. „ „ with double cone. 



Fig. 4. „ „ with single cone. 



Pig. 5. Lecaniiim pater sonicB, pustule of adult. 



Pig. 6. „ pustule of second stage. 



