MECHANISM OF FEEDING IN HEMIPTERA — QADRI 



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by MacGill in Dysdercus intermedins (Pyrrhocoridae, Heteroptera). 

 In Pyrilla the epipharynx is a well-developed plate whose lateral 

 walls are highly sclerotized and are fused with the lora at their bases. 

 The epipharynx and the hypopharynx jointly form the preoral part 



Figs. 1-6. 



1. Tentorium of Pyrilla. 



2. Mandibular and maxillary stylet and salivary syringe of Pyrilla in relation 

 to the head capsule. 



3. Maxilla and mandible of Pyrilla. 



4. Mandible of Pyrilla with the apex magnified (oil immersion). 



5. Mandibular and maxillary stylets of Idiocerus. 



6. Labium of Pyrilla of which one-half is dissected. 



of the food tube. The rest of the food canal is formed by the ex- 

 tension of the pharynx supported ventrally by the sitophore. 



The salivary canal (salivarium) is formed by the extension of the 

 median salivary duct which is elongated and runs along the ventral 

 surface of the hypopharynx. It opens through a separate pointed 

 spinelike process below the hypopharynx. In this way two perforated 



