352 G. E. BODKIN AND L. D. CLEARE. 



head and thorax appeared to have been first withdrawn. The thorax was very 

 much arched, as if great pressure was being exerted, and the body was expanded 

 and contracted in much the same manner as in a human being when breathing. 

 The abdomen was then gradually withdrawn by arching the thorax and first few 

 segments of the abdomen. At this stage the legs were still encased in the exuviae 

 and apparently took no part in the operation. In fifteen minutes the abdomen 

 was entirely withdrawn and stood out at right angles to the old skin. An effort 

 was then made to free the legs. Resting on its head it exerted great pressure and 

 at the same time raised its abdomen as if to lever the legs out. The insect, however, 

 failed to free itself entirely and consequently was given help. 



Fourth Nymphal Stage. — In appearance this stage closely resembles the third 

 nymphal stage. The wing-pads are somewhat bigger and quite noticeable, and the 

 auditory organs are conspicuous on the first abdominal segment. The antennae 

 are somewhat longer than in the preceding stage. 



Length . . . . . . . . . . 20"0 mm. 



Length of hind femora .. .. .. 12 '0 mm. 



No. of segments of antennae . . . . 22 



Fifth Nymphal Stage. — This stage is easily recognised and differs from the 

 preceding ones in that the wing-pads are now very noticeable. The markings 

 to a large extent are the same as in the third and fourth stages, but the white 

 stripes on the thorax are somewhat broader and broaden as they extend backwards, 



Fig. 6. Fifth stage nymph. 



in this way forming a somewhat triangular area, almost a right-angled triangle, 

 with the hypotenuse dorsal. The abdomen is as in the previous stage, but the 

 wing-pads (black in colour) now break the formerly continuous white stripes from 

 thorax to abdomen. Head, antennae, legs and ventral surface as in previous 

 stage. 



Length 27'Omm. 



Length of hind femora . . . . . . 16 '0 mm. 



No. of segments of antennae . . . . 24 



Sixth Nymphal Stage. — This stage is dark also, the markings being practically 

 the same as in the preceeding stage. There is, however, much more black and 



