394 Report of ike Consulting Entomologist. 
variable, much mischief to foliage might ensue ; and also partly 
because, from chemical changes which would or might arise, the 
aceto-arsenite or Paris Green might become another form of copper, 
and the name of " Paris Green Emulsion " be not accurate. 
What the effects might be I cannot say, but in my own recom- 
mendations I limit myself entirely to the use of Paris Green simply 
mixed with water, or with the addition of a little flour, in the way 
of which we have many years' record as safe and serviceable. 
In the apparatus for distribution of insecticides we are improv- 
ing almost from week to week. Witli regard to large and expensive 
spraying machines, tliese are sufficiently before the public, but for a 
convenient form where there is no room for wheeled apparatus we still 
find the knapsack known as L'Eclair (figured on page 232) answer 
excellently. It throws a good spray to tlie height of about fifteen feet, 
and by a very simple adaptation arranged by a co-operator of our 
Evesham Committee, and which each operator could make for him- 
self, the spray can be given an additional elevation, throwing it up 
to twenty or twenty-five feet. I am now in correspondence as to 
having the sprayers adapted by the manufacturers to give this 
greater height. 
As it is a great object to avoid extra expense, I may mention 
that for greater heights we are finding that an ordinary garden 
engine will answer perfectly well with the outlay of a few shillings. 
A water-barrel on two wheels with sufficient pumping force (some- 
thing of the nature of the kind known as the Farringdon Hop and 
Plant Washer) answers well, with the form of sprayer known as 
" fetott's " nozzle, attached by a piece of hose and a tap union. By 
this apparatus a fine spray can be thrown to a height of forty feet, 
and implements often at hand may be made available without 
special outlay. 
One more point is still greatly needing attention, namely, warble 
extirpation. The great losses by this attack are constantly urged 
on me, and I am doing all I can ; but, unlike the orchard work, the 
carrying out of operations rests not with well-instructed owners, 
but in many cases with those who are wholly ignorant, and very 
careless, so that something to meet this difficulty is greatly needed. 
June 2, 1891. 
Since my report of the 5th of May, applications have been^sent, 
as usual, regarding various kinds of crop and orchard insect attacks, 
but for the most part these do not need special mention now. But 
amongst them, that of the wheat-bulb maggot, the larva of the 
Hylemyia coarctata, has once again been doing sucli serious mischief 
that I liave been endeavouring to collect all the information I could 
about it, and now beg to submit a special report on the subject. 
I have received reports of the infestation being present at various 
localities in Essex and Cambridgeshire, also round Bedford, at 
Hertford, near Alford in Lincolnshire, near Dalton-on-Tees, and in 
the district near Gloucester, and also near Tewkesbury. 
