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THE STATUS OF INTRODUCED COCCIDS IN SOUTH AFRICA IN 1917. 



By Chas. K. Brain and Albert E. Kelly, 

 Division of Entomology, Pretoria, South Africa. 



It will probably be of interest to workers on Coccids in other parts of the world 

 to know which species have been introduced into South Africa and to what extent 

 they have become established. Moreover, since so many of these are constantly 

 found during the inspection of our nurseries, etc., it seems desirable to place on 

 record their known distribution (August, 1917) for future reference. Fifty-five are 

 included in this list, which is considered to be approximately complete. Others, 

 such as Lecanium bituberculalum, Targ., L. corni, Bouche, Pulvinaria betulae (L), 

 Sign., Diaspis rosae (Bouche), Aspidiotus piri, Licht., and A. ostreaeformis, Curt., 

 have been stopped at the ports of entry, but since these species are not established 

 in the country they are not included. 



A large number of the records are compiled from the nursery inspection reports 

 -of the junior writer. Whilst these are complete for localities in which registered 

 nurseries exist, there may be other parts of the Union where the species is present 

 but from whence no report has been obtained. 



Subfamily Monophlebinae. 



1. Icerya purchasi, Mask. 



Generally distributed throughout the Union but satisfactorily controlled by 

 Vedalia (Novius cardinalis). This scale often breeds up abundantly on the 

 Witwatersrand until summer is advanced, when Vedalia again gains the upper hand 

 for a month or two. 



2. Icerya seycliellarum, Westw. 

 Durban (Johannesburg, ex Durban). 



Subfamily Ortheziinae. 



3. Orthezia insignis, Dougl. 



Cape Peninsula, Port Elizabeth, East London and Natal Coast. Sporadic in 

 Natal midlands (2,000-3,000 ft.). 



Subfamily Dactylopiinae. 



4. Pseudococcus adonidum (Linn.), Westw. 



Cape Town, Port Elizabeth, Durban, Pietermaritzburg, Pretoria and Johannes- 

 burg. Chiefly a pot-plant pest. 



5. Pseudococcus aurilanatus (Mask.). 



Cape Town, GraafE Reinet, Durban, Pietermaritzburg, Richmond, Johannesburg 

 and Pretoria. 



<3. Pseudococcus bromeliae (Bouche). 



Eastern Cape Province and Natal Coast. 



