Anatomy and Life-History of Pyrops candelaria. 119 
the coxae, in fact wherever the junctions of the body-sclerites form 
crevices where the wax can lodge. The spiracles especially are 
usually quite covered with wax-fibres. The blood of this insect, 
judging from its appearance on a slide, seems to be more or less 
charged with wax. 
The wax-pockets (Fig. 13 Wp) are deep invaginations of the 
pleural region of the cuticle between the abdominal segments; the wax- 
rubbers (Fig. 15 Wr) are cushion-like evaginations of the cuticle of 
the pleural region of the abdominal segments. Whilst the insect is 
ovipositing, the wax seems to be squeezed out of the wax-pockets 
onto the rubbers, probably by muscular movements of the pockets 
aided by blood pressure. 
Although the general arrangement or pattern of the nymphal 
sensory organs is very similar on either side of the body, yet it is 
seldom identical. Nor are many nymphs exactly the same as regards 
the number and disposition of these organs. Each of the little 
cuticular craters has, standing up in its interior, a chitinous rod or 
bristle the base of which connects with a nerve, but this I did not 
trace any further (Pl. 10, Fig. 34). 
