OF SUCTION IN LYGUS PABULINUS. G25 
In vertical sections, they show four lobes, arranged in pairs on 
either side of the operculum. The ligament passes through them 
to give attachment to the divaricators (text-figs. 27, 28, G.Or., 
Lig.). There are nerve-fibres running into the pharynx, and 
also from one lobe to the other. There are, moreover, small 
nerves issuing from them and distributing themselves over the 
epipharyngeal region. 
The Cribriform Plate (text- figs. 27, 28, Cri.P].).— The 
chitinous plate upon which these organs are situated is per- 
forated, and through it the nerve-fibres communicate outward 
Text-figure 27. 
G.0r. 
_ Nerve fibres joining 
the lobes. 
Upper wal! of — 
the Pharynx. 
Cribriform Flate- 
Gils | tase 
Lygus pabulinus. 
Vertical section of the gustatory organs with the cribriform plate, showing 
nerves passing to the periphery, etc. Ob. 6 & Oc. 4. 
For explanation of the lettering see p. 693. 
with the lumen of the pharynx. This cribriform plate seems to 
be analogous with that found in the mammals, in which the 
olfactory nerve-fibres pass through its pores to the olfactory 
sense-organ. 
These organs seem to be gustatory. Their function seems to 
be to taste the sap as it comes into the pharyngeal duct. 
