SYSTEMATIC INDEX. 



CLASS ARACHNIDA. 

 Order Acari. 



Sub-order Sarcoptoidea 



Family Sarcoptidae 

 CAXESTRTNIIDAE. 

 Analgesidae . 

 Listrophoridae 

 Tyroglyphidae 



Sub-order Cryptostigmata Fainily ORIBATIDAE. 



Sub -order Vermiforinia 

 Sub- order Prostigmata 



Sub -order Heterostigma 

 Sub -order Mesostigraata 



Sub-order Notostigmata 

 Sub-order Tetrapoda 



Family Demodicidae . 



Family Trombidiidae . 

 ERYTHRAEIDAE. 

 HYDRACHNIDAE. 

 ,, HALACARIDAE. 



' NlCOLETIELLIDAE. 



Family Tarsonemidae . 



[Family Gamasidae 

 ,, Holothyridae . 

 IXODIDAE. 

 ARGASIDAE. 



Family OPILIOACARIDAE. 

 Family ERIOPHYIIDAE. 



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