50 PLATE CCCCLXXXVI. 
This fpecies is remarkable only for the peculiar mode of defence 
which it inftinGtively adopts when clofely purfued by carnivorous in« 
feGts, or other enemies: on thefe occafions, it emits a diftinét, and 
rather loud noife, either from the vent, or, as fome fuppofe, from the 
friction of the wing-cafes. This found it has the ability to repeat 
feveral times, and which, it may be imagined, is feldom exerted with- 
out fuccefs; the unexpected explofion tor the moment alarming or 
repulfing its purfuer, and allowing, by that means, a convenient inters 
yal for the infeét purfued to effect its efcape. 
An enlarged figure of this infect is given with its natural fize, 
PLATE 
