PLATE II. 

 Fig. 



1. Types of anogenital rings, a, Diaspidinae ; 6, Lecanidinae ; c, Acantho- 



coccidse ; d, Dactylopidse ; e> Monophlebidse. 



2. Types of last abdominal segments of female, a, Diaspidinse ; 6, Lecanidinse ; 



c, Acanthococcicbe ; d, Dactylopidse ; e, Monophlebidse. 



3. Types of last abdominal segments of male, and sheath of the penis, a, Diaspi- 



dinae ; 6, Lecanidinse (CtenochUon) ; c, Acanthococcidse ; d, Lecanidinse 

 (Inglisia) ; e, Dactylopidas ; /, Monophlebidse (leery a). 



4. Respiratory system, a, spiracle of Lecanium (after Targioni) ; &, spiracle of 



Coccus (after Targioni) ; c, diagram of arrangement of the four spiracles 

 and the tracheal tubes (Lecanidinse) (s. spiracles) ; d t spiracle and trachea 

 of Coslostoma. 



5. Types of spines and hairs, a, anal serrated hairs (Aspidiotus nerii) ; 6, 



spiraoular spines (CtenochUon) ; c, marginal spines (Ctenochiton) ; d t 

 lanceolate marginal spines (Inglisia) ; e, spines on anal tubercles (Rhizo- 

 coccus) ; /, marginal spines (Eriococcus) ; #, conical spines (Eriococciis) ; 

 fc, marginal hairs (Dactylopius) ; m, hairs (Icerya) ; n, anal hairs 

 (Ccelostoma). 



