18 
CORN. 
remainder of these up to the apical joint (with the exception of those 
immediately succeeding the basal joints)* were rather longer than 
wide, apparently cylindrical in form, and slightly con- 
tracted at the middle; the terminal joint was bluntly 
/y /j pointed and about as long again as the preceding bead. 
j//y These joints were at first distinctly stalked, so that, 
\jy excepting towards the end of the antenna, they could be 
III seen to be distinctly separated. From the minuteness of 
No.7. Wing the division, and also as with maturity and death, the 
beads drew so nearly together as almost to appear to 
touch, I had great difiiculty in counting them, but after 
repeated examination they appeared to me to be nineteen in number, 
that is, 2 plus 17. The colour altered with change of condition of 
the specimen, but might throughout be called brown. 
The above account refers to the condition of the specimen whilst 
still not quite dead, about eighteen hours after the first observation. 
Twenty-four hours later the raspberry tints were changing to shades 
of brown or yellowish brown, and the black velvety patches at the 
sides of the abdomen were scarcely distinguishable from the transverse 
bands. The changes in colour continued, till on the third day from 
the first observation the raspberry tints had changed to dark brown 
above, lighter or yellowish brown below, the terminal segments and 
the ovipositor still retaining the original tint of yellowish brown. 
From minute examination of structure and comparison with the 
descriptions and figures in the works cited, the imago appeared to me 
• to be without doubt the Cecidomyia destructor of Say, commonly known 
as the “ Hessian Fly.” 
In an attack of this importance, regarding which it is yet to be 
seen whether it will settle in the land as a national scourge, or be a 
temporary infliction from causes not yet made out, I in no way desired 
to rest solely on my own opinion. I therefore submitted infested 
straw to Professor Westwood, Life-President of the Eoyal Entomo¬ 
logical Society, who is personally acquainted with the insect in the 
“ flax-seed ” as well as in the perfect state, and also forwarded others 
to Prof. W. Saunders, President of the Entomological Society of 
Ontario, Canada, a well-known and most sound anthority in the 
matter, and received from both the above referees the confirmation 
that the specimens sent were without doubt the pupae of the true 
Hessian Fly. On the appearance of the imago I submitted it for 
special examination to Mr. K. H. Meade, of Manningham, Bradford, 
* I unfortunately omitted to make a note of the precise form of these at the 
time; from memory I should say they were like the corresponding Joints of the 
male antennse, as figured by Dr. Packard, but not having figured and noted them at 
the time the observation may not be correct. 
