BR. J. ENT. NAT. HIST., 13: 2001 



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 Length of hind-femora (mm) 



Wing-buds lobate 



Wing-buds 



reversed 



(N-1) type 



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 reversed 

 N type 



Fig. 1. C. brunneus. Hind-femora lengths of male nymphs, Site A, 1969: a — on capture, b — after 

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



displaying their development are shaded. If the contribution to the histograms of 

 these five individuals is disregarded the clustering of the data for the remainder is 

 much closer. The diagonal relationship already described shows that, of the 16 

 remaining nymphs taken in the first stage, 10 completed development in five nymphal 

 stages, while one more may be accepted as being in this category by having N-1 type 

 wing-buds after the third moult. Counts of the antennal segments recorded for some 

 or all of the known nymphal stages of these 1 1 (Table 1) were compared with those 

 for field specimens with incomplete rearing histories. Five individuals from the 

 second cluster, six from the third and two from the fourth, for which this was 

 possible, had counts that confirmed the numerical agreement between stage upon 

 capture and position of the cluster. The predominance of a five-stage nymphal 

 history implied by the vertical correspondence between the clusters thus received 

 substantial independent support. 



Site A, 1970 



All hind femora measurements combined have been plotted as histograms in Fig. 

 3, where blocks representing new captures are distinguished by light shading. The 

 pattern, as for females in 1969, is strongly suggestive of a predominantly five-stage 

 nymphal history. A few outliers from the main clusters are again present, but none 



