39 
to hope that we may find a dipterous larva is also aiding us in preveutive 
service. 
I fear these simpie matters may not be worth your attention, but I 
just mention them as a part of the work to which our fruit growers are 
giving careful attention. 
The field crop insect pests have been very prevalent this year, and at 
this time we have just begun a heavy visitation at three places in the 
east of England of the larve of the Plutella cruciferarum Zell (Diamond- 
back Moth as we eall it). But I ought not to venture to intrude on 
your time more than with just two observations more. 
One, that I find the distorted growth of heads of Tares ( Vicia sativa) 
which I drew attention to in my fourteenth report is originated by the 
presence of Cecidomyiid larve. [found them present in large numbers, 
and havecarefully figured the head and caudal extremity and likewise the 
anchor process, which agrees so minutely with that of Cecidomyia lequ- 
minicola Lintner that I am looking forward with impatience to the devel- 
opmentoftheimago. My special colleague in observation of this attack — 
(Mr. A. Hamlin, of Chellowes Park, Lingfield) has planned an arrange- 
ment in the open field by which the imagos when they rise from the 
soil wiil (according to all ordinary habits of insect procedure) be safely 
trapped conveniently for examination. JI am sparing no pains also my- 
self to develop the imagos, though I have not the opportunity to attempt 
to rear the larvee in absolutely natural and undisturbed circumstances. 
My other observation is regarding the Hypoderma bovis, the War- 
ble Fly. We are still fighting ignorance and idleness and downright 
knavery, which are the supports of continuance of this attack; but I 
had the great satisfaction this summer of hearing from Mr. Bailey, the 
head master of the Aldersey Grammar School, Bunbury, Tarporly, Che- 
Shire, that it was not worth while to give mea detailed report again this 
year, as for all practical purposes the attack was now stamped out in the 
district. : 
This gratifies me exceedingly. Some six or eight years ago Warbles 
were described ‘‘as plentiful as blackberries” in the district, and, under 
the teaching of their admirably intelligent master, the boys, who are 
mainly sons of farmers and agricultural laborers, set themselves yearly 
to clear all the cattle they had access to of the maggots. I had yearly 
detailed reports of quantity killed, and now I can point to the district 
and to the satisfaction of the cattle owners as a proof of what can be 
done by the simplest hands where head and heart go to the work. 
But now I ought not to add another word, and if there is anything 
in the foregoing pages which you think worthy of bringing before the 
distinguished Entomological meeting at Washington it will be a great 
gratification to me. I should like much to be present myself, with the 
double pleasure of seeing many whom I know by their letters are 
kind friends to myself, and also learning much that would be of enor- 
mous benefit to me. (Torrington House, St. Albans, England, July 
20, 1891.) 
