LETTERS FROM ALABAMA 
273 
Other species were active on the days that pre- 
ceded and that followed this. 
The insects most worthy of observation at this 
season are those Orthoptera, almost peculiar to 
autumn, the Walking Leaves and the Spectres. 
Of the former, belonging to the genus Mantis, we 
have two or tliree species of large size. They bear 
MANTIS. 
a resemblance to a cockroach, but have the thorax 
greatly elongated, so as to be equal in length to 
the whole body besides ; the wings and their covers 
are, however, more delicate than in the Blatta, and 
T 
