438 
Tlie Progress of the Hessian Fly. 
It will be seen that there are twenty English counties in 
which the presence of the Hessian Fly has been demonstrated. 
Of these Hertfordshire has decidedly suffered the most, and 
Cambridgeshire comes next in point of the serious consequences 
of the attack, though the greatest amount of injury caused on 
one farm was in the East Riding of Yorkshire. In several 
instances where the extent of injury is stated as slight, it was 
found that onlv a few pupa-cases were found here and there. 
With respect to the situation of these twenty counties, a 
glance at the map will show that those which are the most 
seriously attacked lie to the east of the country. 
In Table II. the affected counties of Scotland are shown to be 
as follows : — 
Table II. 
J>ame of Conntv. 
Diitrict or Parbh infested. 
Extent of Injoiy. 
Aberdeenshire ,. !(Sprmghill, Invc-rary, and Tery||Somewliat general^ but 
Banffshire . . 
BerwickBhire 
Elgin 
Fileshire 
Forfarshire . . 
Haddingtonshire . 
Kincardineshire . 
Eoss-shire 
rerthshire . . 
' ( general near sea-coast 
In many parishes near sea 
Bilidean, Cockburnspath ., 
injury not very great. 
Xot very serious. 
Xot very terious. 
SUght. 
Slight 
/Arbroath, Brechin, Meigle,"i 
1 Montrose / 
Drem. Dunbar 
Bervie, and other places near sea 
/Cromarty, Nigg, and places near i 
I, sea /, 
Crieff, Errol, Pitfour Serious. 
Serious and extensive. 
Not verv serious. 
Slight. ■ 
Somewhat extensive. 
Reference to the map of .Scotland will show that all the infested 
counties are in the east of the country ; also that all of them 
have an extensive sea-board, except Perthshire, and this county 
is connected closely with the Xorth Sea by the Firth of Tav. 
^liss Ormerod has made special enquiries as to Caithness, and 
it seems that the pupa-cases have not yet been found thM-e, or in 
Sutherlandshire. 
As concerns the life-historv of the Hessian Flv, but little 
more has been verified than has alreadv appeared in the 
Journal.* The perfect insect, that is, the flv, has been bred in 
confinement by Miss Ormerod, bv mvself, and by several other 
persons, and has been proved to be identical with the American 
species, as described by Mr. Fitch, Professor Riley, Dr. Packard, 
and other American entomologists, as well as with the species 
described by Dr. Lindeman as infesting the Russian corn- 
fields.f Its manner of egg-laying has been witnessed bj 
* • Journal,' 2nd Series, vol. xxii. pp.721 et seq., in waich de.-criptions and 
illustratiun!) of the insect are given by JliKS E. Onuerod, and Mr. 'NVhitehead. 
t ' Die Uesscn Fliege in Ii^^slaud.' Von Dr. K. Liudcmun. Moscow, 1887. 
