HEMIPTERA 335 



stated that both the blight and the ladybird had completely dis- 

 appeared. 



It is kept in check to some extent by a parasitic fly, and by an 

 undetermined species of fungus. 



Coccus persicce, Geoffroy 



In 1891 Mr Maskell recorded this species, or a variety of it, as 

 occurring on grape-vines at Ashburton, under the name of Lecanium 

 rosarum, Snell. 



Coccus persicce, var. coryli, Linn. (Lecanium ribis, Fitch) 



This species was recorded in 1890 by Mr Maskell, who received 

 specimens from Ashburton, from Mr W. W. Smith. At that date it 

 was common in gardens on gooseberries, black and red currants. In 

 the following year he noted its occurrence from various places in 

 Canterbury, and from Oamaru, and added: "the pest is a new arrival 

 in the colony within the last three or four years, and seems to be 

 spreading rapidly." 



Saissetia nigra, Neitner (Lecanium nigrum, L. depressum) 



This was recorded in 1878 by Mr Maskell, as occurring on green- 

 house plants in Christchurch and Wellington. 



Saissetia olece, Bernard (Lecanium oleee). 

 "Black Scale" of California 



Reported in 1884 by Mr Maskell as becoming very common 

 throughout New Zealand, especially in the North Island. It occurs 

 on many plants in gardens and orchards. He found it abundant on 

 Cassinia leptophylla, a native composite shrub which covers the hills 

 near Wellington ; and it was reported also to be spreading on native 

 trees near Whangarei. A very widespread species. 



Saissetia hemispherica, Targioni-Tozzetti (Lecanium 

 hemisphericum, L. hibernaculorum, Boisd.) 



This European species was stated by Mr Maskell in 1878, to be 

 common in greenhouses in Christchurch. In 1884 he found it on 

 Camellia in the Hutt Valley, Wellington. 



Pulvinaria floccifera, Westwood (P. camellicola, Signoret) 



In 1878 Mr Maskell recorded this species as occurring on Camellia 

 in Christchurch and Wellington, and in greenhouses in the south. 



