22 
Siplionophora Rosarum 
meets and fuses in the middle line with its fellow of the opposite side, 
so that each pair of thoracic stigmata are connected by a large trachea 
crossing the thorax transversely. From these tracheae branches are 
given off to the various parts of the thorax. 
abcl. st. 1—7 = stigmata of the 1st—7th abdominal segments. ant. — antenna. 
bk.= beak or proboscis. cor. = cornicle. e. —eye. 
rt. v. conn. — right ventral connecting trachea. 
th. st. 1 and 2 = 1st and 2nd thoracic stigmata. 
The fir'st thoracic stigmata. From the trachea which connects the 
first pair of thoracic stigmata, a branch arises on each side near to the 
stigmata, passes backwards, and enters the second leg of its side. 
This branch extends to the end of the leg. Two other small branches 
pass off in the central region towards the hinder border of the first 
thoracic segment. 
A short distance along the main transverse trachea, five branches 
arise close together on each side, and pass anteriorly. The two outer¬ 
most ones pass to the front of the head ; the next one to the base of the 
proboscis or beak; and the two innermost ones to the central region of 
the head. The anterior one of the last-mentioned tracheae approaches 
