INTRODUCTION. XXXI 
in the first species, more granulated in the 
Jatter species, and in all are formed. of 
one ring more than in the workers and 
females. 
The head is connected to the thorax or 
corslet by. a thin, short, and narrow neck, 
of a fleshy substance, and furnished with 
muscles, by which all its movements are 
regulated. 
The corslet. of the winged individuals 
is very large comparatively to the head; 
that of the workers is much narrower 3; 
that of the former is convex, entire, 
composed of several horny pieces, of 
different forms, retained by proper mem- 
branes: the superior is separated from 
the sternal portion by a furrow, in the 
middle of which the wings are implanted. 
The wings are placed in the back part of 
the corslet, whilst, in other insects of the 
same kind, they are situated more in 
front of the body. Another remarkable 
character respecting their insertion is,— 
that the corslet has none of those instru- 
ments (Cuzllerons) destined to moderate 
a 4 
