Calendar —Continued. 
Larva. 
Flaxseeds. 
Imago. 
DuQuoin. 
Villa Ridge. 
DuQuoin.,. 
• • 
Robinson. 
Robinson. 
Robinson. 
/ .... 
Anna. 
Villa Ridge. 
Robinson. 
Marshall. 
Anna. 
West L T nion. 
Robinson. 
Robinson. 
Anna. 
Marshall. 
Robinson. 
Robinson. 
West Union. 
Robinson. 
Marshall. 
Marshall. 
Villa Llidge. 
Anna. 
.. 
Robinson. 
Remarks. 
Young... 
Bred from No. 34. 
Bred from No. 34. 
Bred from No. 2G. 
Bred from No. 35. 
Bred from No. 33. 
Contained liv’g larvae 
Bred from No. 47. 
Bred from No. 33. In¬ 
sects in copulo. 
Living iarvm. 
Living larvae. 
mgh on a subject as difficult and important as that of the 
imer history of the Hessian fly it is probably best to await 
nal data before attempting to establish a final conclusion, it 
e admitted that the facts above stated strongly suggest the 
esis of a normal completion, before harvest, of the transfor- 
s of a considerable part of the destructive spring brood of 
ivse. 
with a sense of disappointment that I make this statement, 
; condition of things greatly diminishes the value of mid- 
I r measures for the protection of our wheat fields, if it does 
ieed render them almost wholly useless. While undoubtedly 
rning of the stubble in the summer and other measures of 
t must destroy a considerable number of larvae and pupae, it 
possible that enough adult flies will have escaped before har- 
continue the species in scarcely diminished numbers. 
ay be objected that the earliest imagos that escape from the 
brood of larvae may immediately lay eggs, and thus give 
to an intercalated brood of larvae which form flaxseeds before 
;,—perhaps in immature and stunted plants; but it was to 
ant above all others that our attention was especially given 
ar; plants of all ages, from infested fields, being examined 
idreds at a time, with almost microscopic thoroughness and 
ith the express purpose (and I may add the lively hope) of 
Ting such young larvae. The results of all this labor were, 
t, absolutely negative. Not a single larva was found which 
ued at all possible to suppose could have descended from 
later origin than those escaping from the flaxseeds which 
ent the winter in the fields. 
