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The Hessia2z Fly. 197 I
I But when confined, a single female may place all of those laid
- by her on such plants as may be provided. In one instance a
female confined at the Station placed 64 eggs on two young .
z wheat plants growing in a flower pot. These were invariably,
{ as they were in the field, on the upper sides of the blades, in
2 the small longitudinal grooves. In some cases a half dozen  
- were placed together in a single groove, end to end, in others i
but one was noted in a place. They were scattered in this P
instance over much of the lengths of the blades, some being .   _
placed near the tips, others near the bases. In the field they   "
‘ were generally found 2 or 3 together on the lower halves of the  
1 biades. ¤
‘ Quite often the flax seeds (puparia) of the Hessian fly are  
) spoken of by farmers as tl1e "eggs." They do look like the  .-*°
3 I eggs of some insects, but not at all like those of the fiy. They ·
» are the resting stage of the insect, between the grub and adult
Y stages. It must be remembered that the egg of the Hessian
V fly is always found exposed on the upper sides of the blades, i
1 never under the sheaths at the base of the plant, and that it
~· is only to be found on the blades during the fall, and again '
-' for a short period in spring, when the winter brood l1as i
€ emerged as adults and is laying eggs for a second brood to
$1 carry the species through the summer.
·' Eggs obtained October 3 measured just 0.50 millimeter (_ _
b A (0.02 inch) in length, by 0.07 millimeter in diameter. They ";`
Y were cylindrical, smooth, rounded at the tips, sometimes
‘Y curved. a little ; color, light red.  
d The flax seed or puparium, on the Other hand, measures 4  
€ millimeters (0.16 inch) long, and 1.25 millimeter in diameter,  
being 8 times longer than the egg and every way larger. -
k ` The following table gives the data dealt with above in  
lt condensed shape. The figures with reference,-to temper- if
l' . ature were kindly copied for me by Mr. \/V. E. Gary from
" records kept by the local \Veather Station :
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