1974] 
Eisner et al . — - Tenebrionid Beetles 
199 
Fig. 14. Sound oscillograms of Adelium pustulosum. A, chirp sequence 
(2.8 sec. of $ no. 1) ; note bisyllabic composition of chirps (time interval 
= 200 msec). B-C, Expansion of the first ( B ) and second ( C ) syllables of 
chirp shown lettered in A ; the pulsed nature of the sound is clearly resolved 
(time interval = 20 msec). D-E, Individual pulses of first (D) and second 
( E ) syllables. (0.0625 msec/division). 
