245 Mr. Marsham'j ObfervaiJons on the Infecis 



" of the ears which I examined, noVie at all. And when I did find 

 " them, there were but few, and thefe few had not, that I cbnld 

 " difcover, fed on or injured the grain. Since the harvelt has been 

 " o-ot in, I have found the fame infe£l in the hulks of the wild 

 " bearded oats (avetia fjtua), but have not yet feen it in its fly or 

 " perfecl ftate. Should that happen from the chryfalides in my 

 " poffeflTion, you (liall hear from me again. — Amongfl; the ears of 

 " wheat I found feveral fmall black: flies (as they appeared to me), 

 " and imagined that they were produced from the above-mentioned 

 " fmall yellow cbryfulldei; but on confulting our very accurate 

 " friend Dr. Goodcnough, he convinced me that this fmall black 

 " fly was the Thnps phyfopus of Linnaeus ; and that a fmall yel- 

 " lowilh tranfparent infe<a, with 6 legs and 2 antenna (found 

 " alfo amongft the wheat), was its larva (See tab. 22, fig. 5, 6, 

 " 7, 8)." 



Mr. Kirby's communication to me on this fubjefl was in a 

 letter dated Auguft 27, 1795, wherein he fays — " You aflc me 

 " to make enquiries concerning the infect which has infefted 

 *' the wheat this fummer: what follows is the refult of thofe 

 " enquiries, which I hope will give you fatisfaftion. Before I 

 " had received your letter I had paid fome flight attention to the 

 " fubjeft, being informed of the circumflance by fome intelligent 

 " neighbours ; but your requefl: added a flimulus to my endeavours, 

 " and I flatter myfelf that the refult of my refearches will prove 

 " clear and fatisfadory. I had from the firft fufpe6led the infefts 

 " to be the Thrips pbyfapus, a fpecies very common every fummer, 

 " and, after the clofeft inveftlgation, my fufpicions are turned into 

 " conviction. I examined a great number of ears, and in them 

 " found this infedl in all its ftates, between the interior valve of the 



*' corolla 



