88 Mn. Curtis's Ofervations on the 
down the back to the tail, which was terminated by four fmall 
fete, turning a little upwards, the two lowermoft by much the 
 longeft. The larvæ were generally found in confiderable numbers 
together, and on being difturbed ran pretty brifkly. From their fizey 
and other concurring circumftances, I had no doubt but they were 
the larvæ of the S//pba, feeding on the fpoils of the tree's grand 
internal enemy; which being determined to get a fight of, I ordered 
my fervant with a hatchet to chop out a piece of the tree, fuf- 
ficient for the diícovery; when the large maggots reprefented 
tab. 5. f. 1, 2. were found in perpendicularly cylindrical cavities, 
corroding the fubftance of the wood: they were about twice or 
thrice as large as the maggot of the hazel nut, and very much re- 
fembling it in fhape, of a yellowith white colour, grofs body, ap- 
parently without any legs, having a fhining head of a cheftnut 
colour, armed with ftrong jaws. _ | 
I put feveral of thefe, June 27th, into a pan, with fome fragments 
of the wood ; but, the chips oe dry, they relinquifhed their 
abode and pined away. : 
I fhould have taken other fteps t to have reared them, had I not 
been certain that my tree ftill contained great numbers of them: 
in hopes therefore of finding them in their pupa ftate, I waited 
till the 25th of July, when, on cutting out a piece more of the tree» 
my expectations were anfwered; I i a feveral of them, as 
reprefented at fig. 3: at the fame time I found on the bark of the 
tree the Curculio Lapathi, fee fg. 4, 5; and, on cutting farther into 
the tree, I found the fame fpecies juft broke forth from its pupa. 
I was then fatisfied that all the mifchief which had been done 
to the tree was effected by this fpecies of Curculio, and which I had 
fome years before found in great plenty on the leaves of the fame 
fpecies of Salix. Having fucceeded in difcovering the principal cir- 
cumftance of the hiftory of this infect, I was not a little anxious 
to 
