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Reports to the Foreign Office. 
back ; they are laid on 1 X 4 boards, previously nailed to runners ; the 
height of the pans above the ground varies with the height of the crop 
over which the “ hopper dozer ” will be taken. 
The pan should be partly filled with paraffin and water and taken across 
the infected crops until full, when fresh oil and water must be added. 
These machines can be made of any size. 
B. 3. Mineral Poisons. 
Arsenical poisons can be employed to advantage where animals are not 
likely to touch them. I 11 America poisoned bran is successfully employed. 
Mr. Coquillett (U.S. Dept. Agriculture) has found the following formula 
the best : 1 lb. arsenic, 1 lb. sugar, G lbs. bran. Add water to make an 
ordinary mash. 
This is prepared as follows : Mix the dry bran and arsenic in a tub, 
dissolve the sugar in warm water, and mix with the arsenic and bran. 
Place this mixture about in little heaps ; its action is not rapid, but always 
fatal in about twenty-four hours. 
B. 4. The African Locust Fungus (Empusa grylli). 
(Destruction by Fungoid Disease.) 
A fungus known as Empusa grylli found on grasshoppers and locusts 
has been used as a remedy with more or less success. Its introduction into 
Egypt might probably be very beneficial, and certainly should be tried. 
It has been imported into America from Natal, and has destroyed 
injurious swarms of locusts in Colorado and Mississippi. 
Dr. Lounsbury (Cape of Good Hope Kept., 189G) refers to this disease 
and its employment, and says it causes destruction to the swarms when 
proper conditions of moisture are present. 
It has been introduced into Australia and has met with some success 
there also. 
The method of employment adopted by Mr. Froggatt, Government 
Entomologist to New South Wales, is here appended. 
The fungus must be cultivated in a laboratory on gelatine and sent out 
to operators in test tubes. 
The operator proceeds as follows : — The fungus should be sent out in 
definite quantities, enough of the culture to make a tumbler full of liquid 
being a useful proportion. The operator should boil sufficient water and 
let it cool down to luke-warm. The contents of the tube are then extracted 
and mashed up with two teaspoonfuls of sugar and well stirred up in the 
water with several bits of cork, which have been previously placed in the 
glass as indicators. Cover the tumbler with a sheet of paper and then 
place it in a warm room and leave for twenty-four hours. When examined, 
if fit for use, the cork indicators should show mycelium growing on them. 
This culture is taken to the infested land. Then proceed to catch some 
locusts by means of a net. The culture placed in a tin is spread over the 
locusts and they are released, when they carry infection to others and so 
destroy myriads of the pests. 
Mr. Froggatt, Government Entomologist of New South Wales, states 
that one tumbler full of liquid is sufficient for 1000 locusts. 
