1386

ARBORETUM AND FRUTICETUM.

PART III.

elms planted there, by eating the parenchyma, and leaving the skeleton of theleaves dry and brown, that, at first sight, he supposed they had all beenblighted by some neighbouring manufactory of acid. These larvae are blackish,and exhale, when crushed, a most disagreeable smell. They coil up themoment they are touched, and let themselves fall to the ground. The perfectinsect is extremely sluggish in its movements, counterfeiting death, in cases ofdanger, rather than unfolding .its wings to fly away. (See Diet. Cfassiqued’Hist. Nat., art. Galeruque.) It conceals itself in the interstices of the bark,under stones, and between the bricks of walls ; and will produce, sometimes,three generations in the course of one summer. The third is a species of fos-sils (Cossus Ligniperda Fab.), or Goat Moth (y%. 1233.), which has destroyed

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innumerable trees, particularly in the neighbourhood of Paris . The la rva{Jig. 1233. a) is about 3in. long, with its body sprinkled with slender hairs;it is of a reddish brown on the back, becoming yellow beneath, with eightbreathing-holes on the sides, and a black head. It exhales a most disagreeableodour, which is produced by an oily and very acrid liquor, which it dischargesfrom its mouth ; and the use of which is supposed to be to soften the wood be-fore it devours it. This liquor has a strong scent, like that of a goat, whence theEnglish name of the insect is derived. The pupa (c) is brown, the abdominal