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photographs taken by himself from specimens of these 
insects found at Adelaide. Mr. Crawford, having paid 
attention to these insects for some years, favoured me 
at the same time with some notes on habits, &c.; but, 
as my object in publishing this little pamphlet was to 
fulfil my promise to arrange the S. African contributions 
to the best of my power, and likewise since then the 
question of possible identity of species between what 
were considered formerly to be two distinct kinds under 
the names of I. purcliasi and I. sacchari has come 
under consideration, I merely offer Mr. Crawford’s much 
magnified sketches as showing beyond doubt in the 
Adelaide specimen the striated nature of the egg-sac of 
the adult female, and also the long glassy filaments, 
which are characteristic distinctions of I. purcliasi. It 
should be noted that, in the photo, details of structure of 
the legs are not given, and the fore pair, which are 
stretched forward, being seen edgeways, are represented 
narrower than if entomologically displayed. 
Measures of Prevention and Remedy. 
Washes. 
Looking at the impossibility of clearing more than a 
very small proportion of the pest by hand-picking (as 
obviously much of it is out of reach, and likewise 
that most of it which may he in reach, excepting the 
large females, is too small to be hand-picked) ; also, 
looking at the great difficulty in the case of partially 
clearing trees by shaking off the pest of making sure 
that a quantity does not remain on the ground to creep 
up the trees again, it would appear that what is required 
is some mixture to destroy the pest on the infested tree. 
Something is needed—1st, which will not hurt the tree 
or plant; 2nd, which will hurt the “bug,” or render it 
harmless to us whatever stage it may he in; and 3rd, 
this mixture needs to be something that can be applied 
effectually with reasonable ease and at small cost. In 
the early days of attack soft-soap wash is alluded to as 
B 
