iS94. 
[Packard. 
the l)r;iin, and posteriorly it is seen to end in the penultimate 
segment of the body. 
The brain (Fig. 1, hr) or supraoesophageal ganglion forms a 
large rounded mass situated nearly midway bet',s^een the front 
and posterior end of the head. The suboesophageal ganglion 
{soe.g) is but little smaller than the brain and lies directly below. 
5 ? 
and a little behind it. Succeeding this pair of ganglia are 11 or 
12 ganglia, or one to each segment, except the last two abdom- 
inal ones. 
