UK I I Nl NA'I. HIST., 13: 20(11 



207 



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2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 

 Length of hind-Femora (mm) 

 ► •* ► ■* ► 



Wing-buds lobate 



Wing-buds 



reversed 



(N-1) type 



Wing-buds 

 reversed 

 N type 



Fig. 2. C. brwmeus. Hind-femora lengths of female nymphs. Site A. 1969: a — on capture, b — after 

 1, c — after 2, d — after 3, e — after 4 moults in captivity, f — totals of a-e combined. 



this year could be attributed to individuals known from rearing history alone to be 

 four-stage types. Four were however judged to be so when their antenna] 

 segmentation was taken into account; the blocks representing these are heavily 

 shaded. These aberrant specimens would not have been recognised by hind femora 

 length alone; only two on capture had dimensions that stand clear of the main cluster 

 in the penultimate stage while, in the final stage, no such distinction was observed. In 

 fact the reverse inference might be drawn, that the two individuals with hind femora 

 6.2 mm long in the penultimate stage, and these again plus others with hind femora 

 of 8.9 mm or less in the final nymphal stage, could have been four-stage types. 

 Rearing details alone were insufficient to dispel this view, but. when combined with 

 antennal segmentation, gave clear indication of a five-stage sequence for all these. 



One female taken in the first stage had wing-reversal delayed until the fourth moult 

 and died in the fifth stage. Had it lived it presumably would have had six nymphal 

 stages. Data for this specimen have been omitted from the results included here. 



