“I 
to 
ble) 
OF SUCTION IN LYGUS PABULINUS. 
Text-figure 29. 
The growwe of 
the Proboscis. 
3° Joint: 
Sensory or 
tactile hairs, 
Tip of the 
Frobosciss 
Lygus pabulinus. 
Mount, showing the labium macerated in potash and stained with saturated 
picricin, 90 per cent. ale. 
(3) Injection of Saliva into the wound. 
When the stylets reach the particular tissues, the maxillo- 
mandibular muscles begin to act. Their function has already 
been dealt with. The mandibles, when they are pulled in by 
these muscles, get fixed into the cellular walls by means of their 
recurved hooks (text-fig. 25). The maxillary stylets are made 
steady in them action by the mandibles because of their 
interlocking arrangement. 
Before the sap is sucked through the suction-canal, 1t seems 
that saliva is injected into the wound made by the stylets. It is 
possible that the saliva, by being mixed with the sap, may trans- 
