406 INSECTS. 
LONGICORN BEETLE (BATOCERA RUBUS), 
(Cuar. XII. 
suitable for their pur- 
pose; although not 
one was visible but 
a moment before. 
Their approach on 
the wing isannounced 
by a loud and joyous 
booming sound, as 
they dash in rapid 
circles in search of 
the desired object, 
led by their sense of 
smell, and evidently 
little assisted by the 
eye in shaping their 
course towardsit. In 
these excursions they 
exhibit a strength of 
wing and sustained 
power of flight, such 
as is possessed by no 
other class of beetles 
with which I am ac- 
quainted, but which 
is obviously indis- 
