Curculio Lapathi and Silpha grifea. 89 
to find the Silpha in its pupa ftate; and after fearching for it in 
vain, on and under the bark of the tree, I found plenty of them 
under the-furface of the ground, among-the moift earth--and faw- - 
duft, and feveral alfo of the fame infe& in its perfect ftate. 
I had no opportunity of obferving in what manner the female 
Curculio depofited its eggs; moft probably they are laid under the 
bark at firft, or in fome crack or crevice of the tree, arifing from an 
injury: at leaft that isthe mode in which the female Phalena Coffus 
depofits its eggs, and to prevent which we cannot be too much on 
our guard; for, if the larva Have once entered the tree, we fhall in 
vain feek aremedy. If the tree therefore fuftain any injury from 
lopping, or from any other caufe, a piece of canvas, fpread over 
with fome adhefive refinous fubftance, fhould be applied; or the 
nurferyman may find his account in matting over the bodies of his 
young trees, during the months of June and July, when the moth 
comes out of its chryfalis ; ; or perhaps brufhing them over at that 
period with fome of the new tar extraéted from fea coal, might 
anfwer the fame ufeful purpofe. 
EXPLANATION OF TAB. E 
is Fig. 1, 2. Larva of Curculio Lapathi. k EAS 
3. Pupa of ditto. fs. 
4, 5. The fame infe& in its perfe& ftate. 
6. Larvæ of Silpha grifea. 
7. One of the fame larvze magnified, - 
8. Pupa of ditto. 
9. Pupa magnified. 
10. The perfect infect. 
11. Ditto magnified. 
N VII. De- 
