118 J. C. W. KerrsHaw, 
termed “harpes” by Suarr. They probably aid in the placing of 
the egg in its exact position in the ootheca. 
The main nervous system (Fig. 13) is entirely cephalo-thoraeiec, 
there being no abdominal ganglia. There are three large ganglia 
-—— the brain (D), the infraoesophageal (Bi) and the thoracie ganglion 
(Tg). The two former ganglia are connected by very short and 
thick commissures, forming the oesophageal ring, through which the 
oesophagus passes. The thoracie ganglion is connected with the 
infraoesophageal by moderately long commissures. Besides other 
nerves, the thoracic ganglion emits two long commissures (Nc) which 
travel right down the abdomen, one on each side of the median 
line and on the ventral floor; they send out a nerve to each of the 
abdominal segments to the genitalia and other abdominal organs. 
In the newly hatched nymph the brain has a deep median, 
longitudinal constrietion, as if the organ was really formed of two 
lobes (Fig. 19). 
The only features of the musculature calling for special mention 
are the thoracic muscles (Fig. 12 Zm) of the hind legs. These 
muscles are enormously developed, and attach at their lower end to 
a strong, chitinous, mushroom-shaped piece, the thick stalk of which 
descends into the coxa. 
In the median line and on the ventral side of the abdomen, 
held in position by tracheae and Iying between the stomach and 
the genital organs, is a reniform glandular body of a rather bright 
red, connecting on either side with long tubular glands with many 
irregular constrietions, the glands being partly lobed and bilobed. 
These organs are present in both sexes, though much larger in the 
female. The long tubular and lobed glands are usually pinkish in 
colour. I have been unable definitely to make out the function of 
the glands (Fig. 13,14 Ug), or a definite connection with any internal 
organ or with the hypodermis. They are in intimate connection with 
the small tracheae which arise from the basal part of the tracheae, 
which open by the spiracles onto the wax-pockets, and they are also 
in intimate connection with the fat-bodies. There are many points 
about the body!) besides the wax-pockets, where wax collects — on 
the dorsolateral part of the base of the abdomen, whence it rubs 
off into the underside of the wings; on the anal style and tube; on 
1) The white dots on the cephalic prolongation are caused by minute 
dermal wax-glands. 
