Mr, MaRkwick*s Ohfa'VaiiGn^ on the Clover Weevil, 143 



and, as I at firft imagined, no lc2;s ; but I have fince dlfcovercJ, ou 

 a clofer infpciSlion affifled by glaffes, near the head, three imall white 

 fcales or promhienccs on each fide, which I fuppofe may fupply the 

 place of legs, in this minute in fedi. See Tab. V. fig. a. A. I traced it 

 through its chryfalis to its imago or perfc<5l flate, in the following 

 fnanner, Havmg placed a number of the blighted heads of the 

 clover in a box, which was carefully covered with gauze to prevent 

 any infecl from getting either in or out, I found, on opening the 

 box oil the 19th of the fame month, a great number of fmall black- 

 ilh weevils running about in it, and on infpeclion difcovered many 

 of their chrvfalids, flickins; to the ftem at the bafe of the Individual 

 floret, exactly in the fame fituation as I had before found the larvae; 

 nay, I even faw one or two of thefe weevils crawl out from their 

 chryfalids. 



Under thefe circumftances there can be no doubt that the be- 

 fore-mentioned larva changes to a fmall wdiite chryfalis, which dif- 

 fers but little from it, except in being egg-{hapcd and motionlefs; and 

 this produces a fmall blackilli weevil with a long beak, w^hitilli 

 belly, and yellow legs. 



With regard to the quantity of damage done by this little de- 

 flruclive infecV, I know of no better way of afcertaining it, than by 

 taking a comparative view of two of my crops, which grew in two 

 fields adjoining to each other, and w^hich appeared to be equally good 

 with refpe(5l to the growth of the plau'S, but very different in the 

 produce of feed: this \\\\\ leave but little doubt that the deficiency 

 of this year's crop has been occafioned by the devaftations of thefe 

 infedls, which abounded in an aftoniihing degree. This I {hall do 

 with as much accuracy as I can. 



In the year 1798 I grew on nine acres of ground ^juft double the 

 quantity that was faved fcr feed this year) either thirty-three or 

 thirty-four bufhels and a half of clover feed, of which twenty-eight 



9 builiels 



