d 
- 
ry t the Greamiys o ones of Linnaeus, 25 5 
T. ina EU pede direttidn; filling the {pace which it leaves. behind 
it with its excrement, refembling faw-duft, and fo topping all i in- 
 grefs to enemies from. without; but when it has arrived at its ut- 
 moft dimenfions, it does not confine. itfelf to one direction, but 
works in a kind of labyrinth, eating backwards and forwards, 
Which gives the wood under the bark a very irregular furface (a); 
by this mean its paths are of confiderable width, Its attacks are ` 
not confined to the folid : timber, but. in its progrefs it.eats away 
an equal portion of the bark. "The bed of thofe paths where it has 
been at work, exhibits, when clofely examined; a curious appearance, 
occafioned -by the erofions of its maxilla, which excavate an infi- 
nity of little ramified channels. When the infe& is about to 
anid = ES down obl ligue à into the folid wood to the 
x 
Thefe hales (2) are. spem feinicylindrical, iur: aps pcd the 
form of the grub. One would wonder how fo fmall and feemingly 
fo, weak an animal could have firength to excavate fo deep a mine: 
but, when, w we: fee its maxilla, our yodi ceafes; thefe are large, 
thick, and. folid fe&ions. of a cone divided lopgitüdinally (6), which 
an the act of maftication: apply to each. other the whole of their 
interior plane furface, fo: that they grind. the food of the infe& like 
a pair of millftones. Early, in March all the /arve, except fome 
- fickly ones, were! obferved to have entered the wood in this manner ; 
_fome began fo foon, as O&ober. . At the place i in the bark eicit. 
to thi hole. the mago gnaws its way. out of its prifon when it makes 
: pearance, which took place firt on the 20th of May, and 
continued till about the 2oth of June; it returns by the {ame paf- 
fage which the larva had excavated, previous to affuming the pupa 
e THE. 12. fig. Mes ©) Fig. 14 ada. Eo Fig. ~ bb. Big. 7. b. 
= Mr. 
