Reports to the Board of Agriculture. 23 



attacked by scale, were in some instances perfectly healthy ; in others, 

 scale insects (Coccida^) were causing disease. 



The attention of growers is drawn to the normal appearance of 

 bark and rind of the different fruit trees, as it is not an uncommon 

 thing to have cj^uestions asked regarding the spots present on the 

 twigs of various fruit trees and bushes, which are often, as in the 

 present case, mistaken for scale insects. 



The following specimens sent may ]3e taken as examples of 

 this : — 



A. (Apple ; an exceptionally bad case of Quarrenden apple — 

 fourth year.) 



This specimen was covered with the Apple-bark Louse or Mussel 

 Scale {Mytilaspis pomorum) (Fig. 3, a). 



B. (Pear, presumed to be scale of a different variety, somewhat 

 like bark blisters.) 



This twig was quite clean ; the small grey spots (Fig. 3, h) are 

 normal bark spots, but might easily be mistaken for the San Jose 

 Scale {Aspidiotus perniciosus), or the Japanese Fruit Scale {Diaspis 

 amygdali). 



C. (Gooseberry with scale. This scale in most cases has not 

 been noticed to leave a protruded egg trail. Does it ? See E.) 



This specimen contained two specimens of the Brown Currant 

 Scale {Lccanium ribis) ; no white protruding egg mass, i.e., no white 

 cottony nest is formed so as to protrude from the scale in this species, 

 as in the White Woolly Currant Scale {Pulvinaria rihesii). The 

 young scales of this species are much flatter than the old and paler 

 in colour. 



D. (Currant with remnants of " egg trail.") 



Although no scale is attached to the twig of currant sent it 

 contained a large cottony mass of eggs and wool. This resembles the 

 cottony cushion seen in Pulvinaria rihesii (vide C). 



This scale can easily be told from L. ribis by being raised up off 

 the rind by a pad of white wool. 



E. (Gooseberry with remnant of egg trail, etc.) 



This spray of gooseberry had two mature scales of Lecanium ribis 

 and several smaller ones ; also a mass of white wool with no scale 

 attached. The scales are the same as C. Possibly the white wool is 

 due to the same species as D. 



F. (Apple Branch, grey spots on bark.) 



The grey barnacle-like spots referred to are not scales or any 

 insect, but bark spots. 



G. (Quince, red spots on bark.) 



