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ye Liftory of Tipula Tritici, and Ichneumon Tipule, with fome Obfer- 
vations upon other Infects that attend the Wheat, in a Leiter to Thomas 
Marfoam, Efy, Sec. L. S. By the Rev. William Kirby, F.L.S. 
Read February 6, 1798. 
MY DEAR FRIEND. . Barham, Sept. 29, 1797. 
HEN you left me in July laft, you defired me to continue 
my obfervations upon thofe infects that infeft the wheat; 
and particularly to endeavour to complete the hiftory of the larva, 
of which you have given an account in the 3d vol. of the Zran/~ 
attions of the Linnean Society*, and which, with great juftice, you 
fuppofe to be the principal enemy of the grain. In compliance with 
this requeft, I have endeavoured to trace it through all its metamor- 
phofes, and to afcertain, in fome meafure, the quantity of mifchief 
which it is capable of domg—with what fuccefs you fhall now hear; 
and I fhall add fuch other circumftances relative to this and other 
infeéts which attend the wheat, as have occurred to my obfervation. 
What I have collected, although far from being a complete hiftory 
of al/ the infeét infefters of that grain, may afford fome few hints 
which may poflibly be of ufe to affift the inveftigations of abler. 
* Tranf. Linn. Soc. vol. iii. p. 242. Tab. xxii. fig. 9. 10. 11. 12. 
Naturalifts, 
