604 
The Diamond-hack Moth. 
Wor/olk.— On July 21, Mr. Edward Atmore wrote from King's 
Lynn, Norfolk, mentioning the ra%'ages of the caterpillars of F. 
cruciferarum in the N. and N.W. parts of Norfolk, near the sea ; 
also that on July 18, when in fields of turnips near King's Lynn, he 
observed these insects present in all stages — that is, egg, caterpillars 
of various growths, chrysalids, and moths, and already the crops had 
suffered so severely that unless something was done they seemed 
doomed to destruction. 
Report of very bad attack was sent by Mr. John Hammond, 
M.R.C.V.S., from Bale, Dereham, on July 24. Cocoons as well as 
caterpillars were now present, and it was mentioned that " some 
hundreds and possibly thousands of aci'es are thus affected in the 
neighbourhood, and almost every turnip in a field more or less 
injured, threatening a serious loss to farmers." 
Some much injured leaves were sent from Horsey, Great Yar- 
mouth, with the small green caterpillars, and the remark that these 
attack the leaves from beneath and take off nearly all the crop, and 
shortly after, on July 21, ]\Ir. Rising wrote further, mentioning that 
the caterpillars appeared only on the underside of the leaves which, 
where they had been present, had the appearance of fine muslin. 
This comparison, or the term " lace-work " applied elsewhere, well 
describes the fine film, formed merely of the remains of the upper 
cuticle of the leaf (supported by the chief veins), to which the leaves 
are reduced in bad attacks of these caterpillars. 
On August 8, Mr. C. C. Rising, writing from Oxnead Hall, Nor- 
wich, mentioned that his turnips were very much injured by the 
diamond-back moth attack. 
Suffolk and XorfoJk. — One of the most important of the first 
notes of attack of the diamond-back infestation which I received 
was sent me on July 18, with specimens accompanying, by Mr. 
Ernest Clarke, Secretary of the Royal Agricultural Society of Eng- 
land, on the part of Mr. Garrett Taylor, Member of Council of 
R.A.S.E., of Trowse House, Norwich. Mr. Clarke wrote me that 
he was informed that the caterpillars were making fearful havoc 
among the swedes — in fact, a field of thirty acres had been com- 
pletely eaten away— and I Avas urgently requested to telegraph to 
Mr. Taylor at the earliest moment, as there was as much harm being 
done as if there was a swarm of locusts. » 
The infestation occurred in the parishes of Whitlingham 
(Norfolk) and Corton in tlie N.E. of Suffolk, and on July 21 Mr. 
Garrett Taylor wrote me : " You are quite right in stating that, when 
the attack does come, it is apt to sweep the whole crop before it, and 
tliis is what it has done at Corton, near Lowestoft. We have given 
a heavy dressing of parafiin witii the ' Strawsonizer ' and some of 
the smaller tenants have ' scuffled ' the swede crops with boughs, and 
having had some very heavy rains we are hoping that the crop will 
now outgrow the attack, where it has not been so overwhelming as 
in some parts of Corton." 
On J uly 30, Mr. Garrett Taylor wrote me further : " I think 
the best remedy that has yet been found is a mixture of three- 
