288 
Acantliia lectularia 
T/?ff/v5. SEcr/ON 
Rough hEHD. 
Base 0 / 
STYLET 
LhoR/ng 
muscle 
C.H M- 
fpiphar^nx 
Rif’h spmes 
C. H.M. 
} Pump muse/es 
Cavity iT> which 
mandib/e and 
maxilla yvark 
Sativar^ ctucts 
Opening at apex c^ pump 
through which tancets 
thus Joining up their 
tube with cavity pump 
Po!^ pump vrithi 
Yeticuiations ^r 
muscle attachment 
ThtcJ? chih'nous 
watts 
7p oesophayus 
Cno chitinj 
Figs. 14—17. Pharyngeal pump of A. lectularia. 
