1974] 
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Figs. 10-11. Dorsolateral view of rear of body of Adelium pustulosum, 
showing the abdominal tip in the undeflected (Fig. 10) and deflected 
(Fig. 11) positions that mark the limits of the stridulatory motion. The 
arrow points toward the left serrated ridge (reference bar = 1 mm). 
Figs. 12-13. Scanning electronmicrographs of the left stridulatory ridge. 
The elytral margin against which the ridge is scraped extends across the 
top of Fig. 12 (reference bar Fig. 13 = .05 mm). 
