254 Mr. J. C. Kershaw on 
eggs are laid they turn ochreous, and just before hatching 
become pink or purplish. Just emerged, the nymphs have 
the middle of the upper-side light green, the rest (including 
legs and antennz) light pink. In the next stage the 
general colour of the upper-side is pink, with blackish 
margins and a broad blackish marking in form of a cross; 
the antennz and legs are also nearly black. Like the 
adults, the nymphs in their youngest stages vibrate the 
antenne if disturbed, but apparently have not the power 
of using the stink-glands, even if they are developed in 
these stages. However, bugs in the third stage, shown at 
Fig. 4, have these dorsal glands quite distinct. This 
figure shows a specimen just after the first moult from the 
condition of Fig. 3. This stage continues the same in 
shape and colouring, though increasing in size and moult- 
ing several times, till the stage shown at Fig. 5 is reached. 
This figure shows a specimen just before the moult to the 
condition of Fig. 6, so that it will be seen that there is a 
great increase in size from the first to the final moult of 
the stage shown at Fig. 4, but no change in shape or 
colouring till the stage shown at Fig. 5 is reached ; in this 
stage also there are several moults and much increase in 
size to that of the specimen figured, but no change of 
shape or colouring till the stage shown at Fig. 6 is attained. 
In all the stages thus far, the head and thorax are practi- 
cally in the same plane with the abdomen, whilst the whole 
insect is very flat and thin in section. 
In the next stage, Fig. 6, the abdomen becomes more 
convex, and after the last moult the head and thorax 
deflect or bend downwards, the elytra come unsoldered 
and the wings appear, emerging in a folded and soft con- 
dition from beneath the elytra. For an hour or more 
after this final moult the insect is chiefly of a pale green 
and pink, and it remains in a soft state for about two 
days (apparently incapable of using the stink-glands), 
though gradually becoming harder. Finally, its colour is 
a beautiful purple-brown, but one or two days’ exposure 
brings the customary ochreous coloration seen in Fig. 8, 
the sexes scarcely differing. The bugs remain stationary 
for several days before each moult. The final moult to 
the adult condition is accomplished in about an hour, the 
whole insect being light green as it works its way gradually 
out of the old skin, but it almost immediately becomes 
variegated with pinkish-ochreous, 
